AMENDMENT 1 to PNAE G-7-009-89 “Equipment and Piping of ...en.gosnadzor.gov.ru/framework/nuclear/PNAE G-7-009-89.pdfWelding electrodes УОНИИ -13/45 АА , УОНИИ -13/55

Federal Nuclear and Regulatory Authority of Russia (GOSATOMNADZOR OF RUSSIA)

FEDERAL STANDARDS AND RULES IN THE FIELD OF USE OF ATOMIC ENERGY

APPROVED BY Order № 6 of Gosatomnadzor of the USSR of 11 May 1989

EQUIPMENT AND PIPING OF NUCLEAR POWER INSTALLATIONS.

WELDING AND OVERLAYING WELDING. BASIC PROVISIONS

PNAE G-7-009-89

AMENDMENT № 1

to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying Welding. Basic Provisions”

Effective since 1 June 1990

Moscow 2000

UDK 621.039 Equipment and piping of nuclear power installations. Welding and overlaying, basic provisions PNAE G-7-009-89: Regulatory document. - M.: SEC NRS of Gosatomnadzor of Russia, 2000, 172 pages.

These Basic Provisions (BP) cover the welding and overlaying of equipment and pip-ing, which are not subject to the “Rules for Layout and Safe Operation of Equipment and Pip-ing of Nuclear Power Installations (hereinafter referred to as NPI Rules).

These BP establish basic requirements to welding equipment, welding materials, pre-paring and assembling for welding, welding, overlaying, heat treatment of welded joints and overlaid parts (items), safety-at-works, as well as to the main recommended types of welded joints and modes of welding (overlaying).

The repair of structures in use should be conducted in accordance with a process de-veloped pursuant these BP and taking into account the features of the structure to be repaired.

TABLE OF CONTENTS 1. General provisions 2. Welding materials 3. Requirements to welding equipment 4. Requirements to personnel 5. Preparing and assembling of parts for welding (overlaying)

5.1. General requirements 5.2. Preparing for welding (overlaying) 5.3. Assembling

6. Welding 6.1. General requirements 6.2. Heating during welding (overlaying) 6.3. Welding of parts made of steels of different structural classes 6.4. Welding of parts made of two-ply steels 6.5. Electroslag welding 6.6. Argon-arc welding

7. Overlaying of corrosion resistant coatings 7.1. General requirements 7.2. Overlaying procedure

8. Heat treatment 9. Elimination of defects 10. Marking of welded joints and overlaid parts (items) 11. Safety requirements 12. Requirements to structural shapes of welded joints 13. Exemptions from established requirements

Attachment 1. Reference book of regulatory and technical documentation for welding materials permitted for manufacturing, assembling and repair of equipment and piping of nuclear power installations

Attachment 2. Provisional welding and overlaying modes

Attachment 3. Main types of welded joints

1. General Provisions

1.1. These BP include the requirements to: 1.1.1. Welding of parts made of steel grades: ОтЗсп5, 10, 15, 20, 15Л, 20Л, 25Л, 20К,

22К, 15ГС, 16ГС, 20СГЛ, 09Г2С, 10ХСНД, 10ХН1М, 16ГНМА, 15ГНМФА, 12МХ, 12ХМ, 15ХМ, 20ХМ, 20ХМА, 10Х2М, 12Х1МФ, 15Х1М1Ф, 10ГН2МФА, 10ГН2МФАЛ, 12Х2МФА, 15Х2МФА, 15Х2МФА-А, 18Х2МФА, 15Х2НМФА, 15Х2НМФА-А, 15Х3НМФА-А (hereinafter the above listed steel grades are referred to as “perlitic steels”; the steel grades СтЗсп5, 10. 15, 20, 15Л, 20Л, 25Л, 20К, 22К are referred to as “carbon steels”; the steel grades 15ГС, 16ГС, 20ГСЛ, 09Г2С – as “manganese-silicon steels”; and other steel grades – as “alloyed steels”).

1.1.2. Welding of parts made of high-alloyed steel grades 08Х13, 05Х12Н2М, 06Х12НЗД, 06Х12НЗДЛ, 08Х14МФ, 1Х12В2МФ, 07Х16Н4Б (hereinafter the above listed steel grades are referred to as “high-chromium steels”).

1.1.3. Welding of parts made of high-alloyed corrosion resistant steel grades 08Х18Н9, 09Х18Н9, 10Х18Н9, 12Х18Н9, 08Х18Н10, 03Х16Н9М2, 08Х16Н11М3, 10Х18Н12МЗЛ, 10Х18Н9ТЛ, 12Х18Н9Т, 12Х18Н9ТЛ, 06Х18Н10Т, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 10Х17Н13М2Т, 10Х17Н13МЗТ, 10Х18Н12МЗТЛ (hereinafter the above listed steel grades are referred to as “austenitic steels”).

1.1.4. Welding of parts made of iron-nickel alloy grades 03Х21Н32МЗБ, Х15Н35ВЗТ, 10Х16Н36МЗТЮБР among themselves and the parts made of austenitic steels.

1.1.5. Welding of parts made of perlitic steels with parts made of high-chromium steels and austenitic steels; parts made of high-chromium steels with parts made of austenitic steels (hereinafter referred to as “welding of parts made of different structural steel grades”).

1.1.6. Welding of parts made of two-ply steels. 1.1.7. Overlaying of corrosion resistant coating. 1.1.8. Reinforcing overlaying. 1.2. The design documentation for welded joints (overlays) should be agreed upon with

the manufacturing enterprise (assembling organization). 1.3 Welding and overlaying should be conducted in accordance with the process and

engineering documentation (PED) (process instructions or process flowcharts) generated con-sidering the requirements of these BP, regulatory document “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying. Rules for Inspection of Welded Joints and Over-laid Parts” (hereinafter referred to as RFI) and design documentation. PED should be agreed upon in accordance with the procedure established in NPI Rules, Section 4. The same proce-dure is applied for modifications to the above documentation as regards the base and welding materials, heating and heat treatment.

1.4. Welding of materials, which are not indicated in these BP but permitted for use by NPI Rules is allowed as agreed upon with Gosatomenergonadzor of the USSR and in accor-dance with PED developed by the manufacturing enterprise (assembling organization) taking into account the requirements of these BP and concurred with the Industry and Interagency Leading Material Study Organizations. It is allowed to apply PED developed by the Leading Material Study Organization. N o t e . Hereinafter the Leading Material Study Organization should mean the Industry Lead-ing Material Study Organization.

1.5. The use of welding (overlaying) techniques and/or welding materials, which are not indicated in these BP, is allowed pursuant the procedure established in NPI Rules for the use of new materials.

2. Welding Materials

2.1. The welding materials permitted for fabrication of welded joints of Categories I, II and III and overlaying are given in Tables 1-5, and of welding joints of Categories Iн and IIн are given in Tables 6-8. Definitions are given in RFI document.

2.2. The limiting permissible temperature at which the welded joints of Categories I, II or III fabricated in accordance with these BP are to be used is similar to that established by NPI Rules for steel grades the welded parts are made of, and in case of welded joints of Cate-gories Iн and IIн it is given in Tables 6-8.

2.3. The welding materials for welding of parts (assembly units) should be the welding materials intended for fabrication of welded joints of parts made of corresponding steel (alloy) grades.

2.4 During assembling of parts and assembly units made of two-ply steels the tack welds are fabricated in accordance with the requirements of these BP, para. 6.4.

During assembling of parts made of perlitic steels (except for parts made of steel grades 15Х2МФА-А and 15Х2НМФА-А to be joined among themselves) it is allowed to use for tack welds:

• welding electrodes УОНИИ-13/45, УОНИИ-13/45А and УОНИИ-13/55, ЦУ-7, ЦУ-7А, ТМУ-21У for manual coated electrode welding (only first three types of welding elec-trodes are allowed for assembling of the parts to be in contact with liquid metal cool-ant);

• welding wire Св-08ГС and Св-08Г2С for argon-arc tack welding. Welding electrodes УОНИИ-13/45АА, УОНИИ-13/55АА or ЦУ-7А should be used for

tack welding of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А among themselves. 2.5. In case of weld root welding of parts’ joints (assembly units) made of alloyed steels

joined together or with manganese-silicon and carbon steels (except for welded joints of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А among themselves) it is allowed to use:

2.5.1. For manual arc coated electrode welding and argon-arc welding – the same welding electrodes as for the tack welding as per Subsection 2.4.

2.5.2. For automated hidden arc welding – the welding wire Св-08А, Св-08АА and Св-08АА-ВИ in combination with fluxing agents ОСЦ-45, АН-348А, АН-42, АН-42М and НФ-18М; the welding wire Св-06А in combination with fluxing agents АН-42, АН-42М and НФ-18М; as well as the welding wire Св-08ГА in combination with fluxing agent ФЦ-16. N o t e . Weld root should be not more than 30% of the nominal thickness of the parts being welded (design angle weld height) but not more than 20 mm.

2.6. The corresponding welding materials indicated in Table 1 should be used for weld-ing of weld roots of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А among them-selves. Besides the welding materials as per Table 9 are permitted.

2.7. To fabricate welding joints of Category III of parts made of steel grades Ст3сп5, 10, 15, 15Л, 20Л and 25Л it is allowed to use welding electrodes МР-3, 0ЗС-4, 0ЗС-6, and АНО-4, and to fabricate welding joints of the same Category of parts made of steel 12Х1МФ the welding electrodes ТМЛ-1У and ТМЛ-3У are allowed.

2.8. Welding materials should meet the requirements of standards, specifications and charts indicated in Attachment 1 and have a certificate.

2.9. Welding materials should be stored as batches and their use for designated pur-pose should be ensured.

2.10. A definition of the coated welding electrode batch is given: for manual arc welding – as per GOST 9466-75; for welding wire – as per GOST 2246-70; for overlaying tape – as per GOST 4986-79; for fluxing agent – as per GOST 9087-81.

Table 1

Welding materials to fabricate welded joints of parts made of perlitic steels (except for welded joints of Categories Iн and IIн)

Grades of welding materials in use

For automated hidden arc welding For electroslag welding Steel grades of parts being

welded

Coated elec-trodes for

manual arc welding

Wire Fluxing agent

Welding wire for argon-arc welding

(including gas shielded welding)

Wire Fluxing agent

Note

1 2 3 4 5 6 7 8

Св-08А Св-08АА Св-08ГА

ОСЦ-45, АН-42, АН-42М, АН-348А, АН-348АМ, ФЦ-16

Св-06А АН-42, АН-42М, НФ-18М

СтЗсп5,10,15, 15Л, 20, 20Л, 25Л, 20К, among them-selves, with steel 22К, with manganese-silicon and alloyed steels

УОНИИ-13/45 УОНИИ-13/45А УОНИИ-13/55 ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А, ТМУ-21У

Св-08ГСМТ АН-42, АН-42М, КФ-30

Св-08ГС, Св-08Г2С, Св-06А

Св-10Г2, Св-12ГС, Св-08ГСМТ

ОСЦ-45, АН-8

Wire Св-08ГСМТ in com-bination with flux-ing agents АН-42 and АН-42М; and wire Св-08ГС in combi-nation with flux-ing agents ФЦ-11 and ФЦ-16 are used for automated hid-den arc welding of steel grade 22К with nominal

Св-08ГС ФЦ-11, ФЦ-16, ФЦ-22, КФ-19, КФ-30

Св-10Г2, Св-08ГА

ФЦ-11, ФЦ-16, КФ-27

Св-10Г2 ФЦ-22

wall thickness more than 36mm. At this, the weld root layers are made with weld-ing wire Св-08А or Св-08АА

Св-08А, Св-08АА

ОСЦ-45, АН-42, АН-42М, АН-348А, АН-348АМ, ФЦ-16

Св-06А АН-42, АН-42М, НФ-18М

22К with 22К and steel grades 15ГС, 16ГС, 20ГСЛ, 09Г2С, 10ГН2МФА, 10ГН2МФАЛ, 15Х2НМФА 15Х2НМФА-А

УОНИИ-13/45 УОНИИ-13/45А УОНИИ-13/55 ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А, ТМУ-21У

Св-08ГСМТ ОСЦ-45, АН-42, АН-42М, АН-348А, АН-348АМ, КФ-30

Св-08ГС, Св-08Г2С, Св-06А

Св-10Г2, Св-12ГС, Св-08ГСМТ

ОСЦ-45, АН-8

Св-08ГС ФЦ-11, ФЦ-16, КФ-19, КФ-30, ФЦ-22

Св-08ГС, Св-12ГС

ФЦ-11, ФЦ-16, КФ-19

15ГС, 16ГС, 20ГСЛ, 09Г2С with steel grades 15ГС, 16ГС, 20ГСЛ, 09Г2С, 10ХСНД, 16ГНМА, 15ГНМФА, 12ХМ, 15ХМ, 20ХМ, 20ХМА, 10Х2М, 12Х1МФ, 15Х1М1Ф in any combina-tion

УОНИИ-13/55 ЦУ-5, ЦУ-7, ЦУ-7А ТМУ-21У Св-10Г2,

Св-08ГС ФЦ-22

Св-08ГС, Св-08Г2С

Св-10Г2, Св-12ГС

ОСЦ-45, АН-8

Welding elec-trodes ЦУ-5 are used only for welding of weld roots.

10ХСНД with 10ХСНД

УОНИИ-13/45, УОНИИ-13/45А УОНИИ-13/55 ТМУ-21У, ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А

Св-08ГА, Св-10ГА

ОСЦ-45, АН-348А, АН-348АМ


Св-10Г2

ОСЦ-45, АН-8, ОФ-6

Welding elec-trodes ЦУ-5 are used only for welding of weld roots.

Св-08ГСМТ КФ-30, АН-42, АН-42М

Св-10НМА АН-42, АН-42М

Св-08ГА, Св-10ГА

ОСЦ-45, АН-348А, АН-348АМ

10ХН1М with 10ХН1М and with 10ХСНД

УОНИИ-13/45 УОНИИ-13/45А УОНИИ-13/55 Н-20, Н-25

Св-10ГН1МА КФ-27, КФ-30


Св-04Х2МА, Св-08ГСМТ

ОФ-6

16ГНМА with 16ГНМА and with 15ГНМФА, 12ХМ, 15ХМ, 20ХМ, 20ХМА

ЦЛ-21, ЦЛ-48 Св-10НМА ФЦ-11, ФЦ-16

Св-10НМА Св-10НМА ФЦ-11, АН-8, ОФ-6

-

15ГНМФА with 15ГНМФА and with 12ХМ, 15ХМ, 20ХМ, 20ХМА

ЦЛ-52 Св-10ГНМА ФЦ-11, ФЦ-16

Св-10ГНМА - - -

10ГН2МФА, 10ГН2МФАЛ with 10ГН2МФА and 10ГН2МФАЛ and with 15Х2НМФА, 15Х2НМФАА, 15Х3НМФА, 15Х3НМФАА

ПТ-30 ЦЛ-59

Св-10ГНМА Св-10ГН1МА

ФЦ-16 Св-10ГНМА, Св-10ГН1МА

Св-10ГН2МФА ОФ-6, ФЦ-21

For argon-arc welding it is al-lowed to use welding wire when silicon con-tent is not less than 0.22%

12МХ, 12ХМ, 15ХМ, 20ХМ among them-selves and with 20ХМА, 12Х1МФ, 15Х1М1Ф

Н-3, ЦУ-2ХМ, ЦЛ-38

Св-08ХМ ФЦ-11, КФ-16

Св-08ХМ, Св-08ХГСМА

- - For argon-arc welding it is al-lowed to use welding wire Св-08ХМ when sili-con content is not less than 0.22%

10Х2М with 10Х2М and with 12ХМ, 15ХМ, 12Х1МФ, 15Х1М1Ф

Н-10 Св-04Х2МА КФ-16 Св-04Х2МА - - -

20ХМА with 20ХМА

Н-3, ЦУ-2ХМ, ЦЛ-38

Св-08ХМ, Св-08ХМФА

АН-42, АН-42М

- - - -

12Х1МФ, 15Х1М1Ф with 12Х1МФ, 15Х1М1Ф

Н-6, ЦЛ-20, ЦЛ-39, ЦЛ-45

Св-08ХМФА ФЦ-11, ФЦ-16, КФ-16

Св-08ХМФА, Св-08ХГСМФА

- - For argon-arc welding it is al-lowed to use welding wire Св-08ХМФА when silicon con-tent is not less than 0.22%

15Х3НМФА with 15Х3НМФА and 15Х3НМФАА

РТ-45Б, Н-23 Св-09ХГНМТА, Св-09ХГНМТАА-ВИ

НФ-18М, КФ-30

Св-08ГСМА, Св-08ГСМТА

Св-16Х2НМФТА

ОФ-6 -

15Х2НМФА with 15Х2НМФА and with 15Х2НМФАА

РТ-45А, РТ-45АА, РТ-45Б

Св-12Х2Н2МА, Св-12Х2Н2МАА

ФЦ-16 Св-12Х2Н2МА, Св-12Х2Н2МАА

Св-16Х2НМФТА

ОФ-6, ФЦ-21

Св-09ХГНМТА, Св-09ХГНМТАА-ВИ

НФ-18М Св-09ХГНМТА Св-09ХГНМТАА-ВИ

-

15Х2НМФА-А with 15Х2НМФА-А

- Св-09ХГНМТАА-ВИ

НФ-18М КФ-30

- - - -

15Х2НМФА-А with 15Х2НМФА-А

РТ-45АА Св-12Х2Н2МАА, Св-12Х2Н2МАА-ВИ

ФЦ-16А НФ-18М, КФ-30

Св-12Х2Н2МАА Св-09ХГНМТАА-ВИ

- - -

12Х2МФА, 15Х2МФА, 18Х2МФА among them-selves and with15Х2МФАА

Н-3, Н-6, Н-3АА, ЦЛ-20

Св-10ХМФТ, Св-10ХМФТУ

АН-42М, КФ-30

- Св-13Х2МФТ, Св-13Х2МФТА

ОФ-6 -

15Х2МФА-А with 15Х2МФА-А

- Св-10ХМФТУ АН-42М, КФ-30

- Св-13Х2МФТА ОФ-6 -

Table 2.

Welding materials to fabricate welded joints of parts made of high-chromium steels with parts made of high-chromium steels and perlitic steels (except for welded joints of Categories Iн and IIн)


For automated hidden arc welding Steel grades of parts being welded

Coated welding elec-trodes for manual arc

welding wire fluxing agent

Welding wire for argon-arc welding (in-cluding for gas shielded welding)

08Х13 with 08Х13 and with 06Х12Н3Д (06Х12Н3ДЛ), 1Х12В2МФ

УОНИИ/10Х13 ЦЛ-51

Св-06Х14 Св-01Х12Н2-ВИ

АН-22 ОФ-6

Св-06Х14 Св-01Х12Н2-ВИ Св-01Х12Н2МТ-ВИ

06Х12Н3Д (06Х12Н3ДЛ) with 06Х12Н3Д (06Х12Н3ДЛ) and with 10ГН2МФА, 10ГН2МФАЛ

ЦЛ-51 Св-01Х12Н2-ВИ* ОФ-6 ФЦ-19

Св-01Х12Н2-ВИ

1Х12В2МФ with 1Х12В2МФ ЦЛ-32 Св-14Х12НВМФ АН-17М Св-10Х11НВМФ

08Х14МФ with 08Х14МФ ЦЛ-51 ЦТ-45

Св-01Х12Н2-ВИ ОФ-6 ФЦ-19

Св-01Х12Н2-ВИ Св-03Х20Н45Г6М6Б-ВИ

08Х14МФ with steels 20 and 22К

ЦТ-45 ЦЛ-51

Св-01Х12Н2-ВИ* ОФ-6 Св=01Х12Н2-ВИ Св-03Х20Н45Г6М6Б-ВИ

05Х12Н2М with 05Х12Н2М - - - Св-01Х12Н2МТ-ВИ

07Х16Н4Б with 07Х16Н4Б - - - Св-09Х16Н4Б

• With preliminary overlaying except for parts made of steel grades 10ГН2МФА, 10ГН2МФАЛ, 20 and 22К with welding electrodes ЦЛ-51.

Table 3 Welding materials to fabricate welded joints of parts made of austenitic steels (except for welded joints of Categories Iн and IIн)


For automated hidden arc welding For electroslag welding

Steel grades of parts being welded Coated welding

electrodes for manual arc

welding

Wire Fluxing agent


(including gas shielded welding)

Wire Fluxing agent

Св-04Х19Н11М3 ОФ-6 ФЦ-17 Св-04Х19Н11М3 (wire)

ОФ-6

Св-08Х19Н10МЗБ ОФ-6

Св-04Х19Н11М3

Св-06Х19Н9Т (wire)

ОФ-6

10Х18Н9ТЛ 12Х18Н9Т 12Х18Н9ТЛ 06Х18Н1ОТ 08Х18Н1ОТ 12Х18Н1ОТ 08Х18Н12Т 12Х18Н12Т 10Х17Н13М2Т (in any combination)

ЭА-400/10У ЭА-400/10Т ЦТ-15К ЦТ-26 ЦТ-26М ЭА-898/21Б ЭА-902/14

Св-08Х19Н10Г2Б Св-04Х20Н10Г2Б

ОФ-6 Св-08Х19Н10Г2Б Св-04Х20Н10Г2Б

08Х18Н1ОТ (plate)

ОФ-6

03Х21Н32МЗБ with 03Х21Н32МЗБ and with 12Х18Н9 12Х18Н9Т 08Х18Н1ОТ 12Х18Н1ОТ 08Х18Н12Т 10Х17Н13М3Т

ЭА-855/51 Св-03Х15Н3517М6Б

ОФ-6 Св-03Х15Н35Г7М6Б

- -

10Х18Н12МЗТЛ

08Х18Н10Т, 12Х18Н10Т with 10Х16Н36М3ТЮБР

- - - Св-30Х15Н35В3БЗТ

- -

N o t e . In case of hidden arc welding of parts made of steel grade 08Х18Н10Т with the use of welding wire Св-04Х19Н11М3 intended for operation at temperature below 200°С, it is permitted to use fluxing agent АН-26 or АН-26С provided each batch of welding wire is preliminary checked along with each batch of fluxing agent whether the welded joints specially fabricated with the use of these materials have cracks in the root metal; the welded joints are tested using radiographic and metallographic tech-niques.

Table 4 Welding materials to fabricate welded joints of parts made of austenitic steels with parts made of perlitic and high-chromium

steels (except for welded joints of Categories Iн and IIн)

Characteristics of parts be-ing welded

Grades of welding materials for preliminary overlaying of edges of parts made of perlitic and high-chromium steels

Grades of welding materials to fabricate weld

For automated hidden arc overlaying

For automated hidden arc welding

Materials Nominal part thickness in

welding loca-tion, mm

Coated welding

electrodes for manual arc over-

laying

Tape or wire Flux. agent

Welding wire for ar-gon-arc welding

Coated welding

electrodes for manual arc welding

Wire Flux. agent

Welding wire for ar-gon-arc welding

ЭА-395/9 ЦТ-10

СВ-10Х16Н25АМ6 ОФ-6 Св-10Х16Н25АМ6

ЗИО-8 ЦЛ-25/1 ЦЛ-25/2

Св-07Х25Н13 ОФ-6 СВ-07Х25Н13

Up to 10 (in-clusive)

-

-

-

-

ЭА-855/51 Св-ОЗХ15Н35Г7М6Б

ОФ-6 Св-ОЗХ15Н35Г7М6Б

Austenitic steels with carbon steels or manga-nese-silicon steels

Independently of thickness

ЭА-395/9, ЦТ-10

Св-10Х16Н25АМ6 ОФ-10

Св-10Х16Н25АМ6 ЭА-400/10У ЭА-400/10Т ЦТ-26 ЦТ-26М

Св-04Х19Н11МЗ ОФ-6 Св-04Х19Н11МЗ

ЭА-855/51 Св-ОЗХ15Н3517М6Б ОФ-6

СВ-ОЗХ1БН35Г7М6Б

ЭА-855/51 Св-ОЗХ15Н35Г7М6Б

ОФ-6 Св-ОЗХ15Н35Г7М6Б

First layer

ЭА-395/9 ЦТ-10

Св-10Х16Н25АМ6 ОФ-10

Св-10Х16Н25АМ6

ЭА-400/10У ЭА-400/10Т ЦТ-26 ЦТ-26М

Св-04Х19Н11МЗ

ОФ-6 ФЦ-17

Св-04Х19Н11МЗ

Second and subsequent layers ЭА-400/10У, ЭА 400/10Т, ЦТ-26, ЦТ-26М

Св-04Х19Н11М3 ОФ-10 ФЦ-18 (tape) ОФ-10 ФЦ17 (wire)

Св-04Х19Н11МЗ ЭА-898/21Б ЦТ-15К

СВ-04Х20Н10Г2Б Св-08Х19Н10Г2Б

ОФ-6 СВ-04Х20Н10Г2Б Св-08Х19Н10Г2Б

ЭА-395/9*

ЦТ-10*

СВ-11Х16Н25АМ6* ОФ-6 Св-10X16Н25АМ6к Up to 6 (inclu-sive)

- -

-

-

ЭА-855/51 Св-0ЗХ15Н35Г7М6Б

ОФ-6 Св-0ЗХ15Н35Г7М6Б

First layer

Independently of thickness ЭА-395/9*

ЦТ-10* Св-10Х16Н25АМ6* ОФ-

10 Св-10X16Н25АМ6*

ЭА-400/10У ЭА-400/10Т ЦТ-26, ЦТ-26М

Св-04Х19Н11МЗ

ОФ-6 ФЦ-17

Св-04Х19Н11МЗ

Austenitic steels with alloyed steels or high-chromium steels

Second and subsequent layers ЭА-898/21Б ЦТ-15К


ОФ-6


ЭА-400/10У ЭА-400/10Т ЦТ-26 ЦТ-26М

Св-04Х19Н11МЗ ОФ-10 ФЦ-18 (tape) ОФ-6 ФЦ-17

Св-04Х19Н11МЗ

First and subsequent layers

ЭА-855/51 Св-0ЗХ15Н35Г7М6Б ОФ-6 Св-ОЗХ15Н35Г7М6Б

ЭА-855/51

Св-0ЗХ15Н35Г7М6Б

ОФ-6

Св-0ЗХ15Н35Г7М6Б

N o t e s t o T a b l e 4

Notes:

1. The welding materials which are used only for welding and overlay-ing niobium non-containing steels are marked with an asterisk.

2. Heat treatment of welded joints with welds fabricated using niobium non-containing welding materials is not permitted.

3. While making angle and tee- welding joints with the design angle weld height of up to 10 mm inclusive when the parts made of austen-itic steels are welded to these of carbon and manganese-silicon steels of any thickness and up to 6 mm inclusive when the parts made of austenitic steels are welded to these of alloyed and high-chromium steels, the necessity of preliminary edge overlaying is de-termined by the design documentation and PED requirements.

4. Automated hidden arc overlaying and welding using welding wire Св-07Х25Н13 and Св-10Х16Н25АМ6 and automated hidden arc over-laying using welding wire Св-04Х19Н11МЗ are permitted as agreed with the leading material study organization.

5. In case of combined welding techniques the welding materials should be used, which are indicated in the same line of the Table (separated by horizontal lines).

6. In case of manual coated electrode arc welding using welding elec-trodes ЭА-855/51 or argon-arc welding using welding wire Св-ОЗХ15Н35Г7М6Б it is allowed not to preliminary overlay edges of parts made of perlitic and high-chromium steels if the parts with over-laid edges are not subject to heat treatment in accordance with the requirements of these BP.

7. The welding of austenitic steels with parts made of perlitic and high-chromium steels using filler materials non-containing niobium is per-mitted only in cases of forced heat treatment of the welded joint of these steels provided the PED for such welding is agreed upon with the interagency leading material study organization.

Table 5 Welding (overlaying) materials for overlaying of corrosion resistant coating on parts (items) made of perlitic steels

Characteristics of coating being over-

laid

Grades of welding (overlaying) materials

For automated hidden arc overlaying By type By number of overlaid

layers

Overlaid layers

Tape or wire Fluxing agents

Coated welding electrodes for

manual arc over-laying

Welding wire for ar-gon-arc overlaying

Note

1 2 3 4 5 6 7 8 Single-layer

Нп-0ЗХ22Н11Г2Б Св-0ЗХ241113Г2Б

ФЦ-18 (tape), ФЦ-17 (wire)*

ЭА-855/51 СВ-0ЗХ15Н35Г7М6Б Permitted only for over-laying of parts made of steel grades 20, 20К, 22К All Св-07Х25Н13 ОФ-10, ФЦ-18

(tape), ОФ-6 (wire) *

ЦЛ-25/1, ЗИО-8** (first layer) ЗИО-8, ЦЛ-25/2 (sec-ond layer and subsequent lay-

Св-07Х25Н13 -

Uniform

Multi-layer

All СВ-0ЗХ15Н35Г7М6Б

ОФ-10 ЭА-855/51 СВ-0ЗХ15Н35Г7М6Б -

First Св-07Х25Н13 ОФ-10, ФЦ-18 (tape)

ЦЛ-25/1 ЗИО-8**

Св-07Х25Н13 - Double Two-layer

Second Св-04Х20Н10Г2Б ОФ-10, ФЦ-18 (tape) ОФ-6, ФЦ-17 (wire)**

ЭА-898/21Б ЦТ-15К

Св-04Х20Н10Г2Б -

First Св-07Х25Н13 ОФ-10, ФЦ-18 (tape) ОФ-6 (wire)*

ЦЛ-25/1 ЗИО-8**

Св-07Х25Н13 Multi-layer

Secon and sub-sequent


ОФ-10, ФЦ-18 (tape) ОФ-6, ФЦ-17 (wire)**

ЭА-898/21Б ЦТ-15К


There should be not less than two layers made with wire Св-08Х19Н10Г2Б and elec-trodes ЭА-898/21Б, ЦТ-15К

N o t e s : 1. The welding materials, which are permitted for use only upon agreement with the leading material study organiza-tion, are marked with an asterisk. 2. The welding electrodes which batches are permitted for use provided the content of the ferritic phase in the overlaid metal is not less than 4% are marked with two asterisks. 3. Subject to the agreement by the leading material study organization it is permitted to use welding wire Нп-03Х22Н11Г2Б and Св-03Х24Н13Г2Б in combination with fluxing agent ФЦ-18 to fabricate the first layer of coating. 4. Heat treatment of overlaid corrosion resistant coating having the first layer made with niobium non-containing filler materials is not permitted. 5. In case of a single-layer coating it is permitted to use welding electrodes ЭА-855/51 and welding wire СВ-0ЗХ15Н35Г7М6Б only to eliminate defects in the layer.

Table 6 Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of perlitic and high-chromium steels

Grades of welding materials in use For automated hidden arc weld-

ing

Steel grades of parts

being welded Coated welding electrodes for manual arc

welding wire flux. agent

Welding wire for ar-gon-arc welding (in-cluding gas shielded

welding)

Maximum permissible temperature in use,

0С

СтЗсп5, 10, 15, 20, 22К in any combination

УОНИИ-1З/45* УОНИИ-13/45А* УОНИИ-13/55

Св-08А* Св-08АА* Св-10Г2

ОСЦ-45* АН-348А* КФ-27

Св-08ГС Св-08Г2С

350

12Х1МФ, 15Х1МФ in any combination

Н-6 Св-08ХМФА КФ-16 Св-08ХМФА 550

05Х12Н2М с 05Х12Н2М

ЭМ-959/52 Св-01Х12Н2МТ-ВИ

КФ-28 Св-01Х12Н2МТ-ВИ 550

10Х2М с 10Х2М Н-10 Св-04Х2МА КФ-16 Св-04Х2МА 510

N o t e s :

1. The welding materials permitted for use where the nominal thickness of parts being welded is not more than 60 mm are marked with an asterisk.

2. Subject to agreement with the leading material study organization it is permitted to carry out: manual arc welding of parts made of carbon steels using welding electrodes ТМУ-21У; automated hidden arc welding of parts made of steel grade 22К using welding wire Св-08ГС in combination with fluxing agent ФЦ-16.

Table 7 Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of austenitic steels

Grades of welding materials in use For automated hidden arc

welding For electroslag welding

Steel grades of parts be-ing welded Coated

welding electrodes for manual arc weld-

wire flux. agent

Welding wire for ar-gon-arc welding (in-cluding gas shielded

welding) wire fluxing

agent

Maximum per-missible tempera-ture in use, oC

08Х18Н9. 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 10Х18Н12МЗТ in any

А-1, А-1Т А-2, А-2Т

Св-04Х17Н10М2 Св-02Х17Н10М2-ВИ

ОФ-6 ОФ-6


- - 600

10Х18Н9, 12Х18Н9, 08Х16Н11МЗ in any combination

А-1, А-1Т Св-04Х17НЮМ2 ОФ-6 Св-04Х17Н10М2 - -

600 (дfor welding of parts made of steel grade 12Х18Н9-450)

0ЗХ16Н9М2 with 0ЗХ16Н9М2

ЦТ-26 ЦТ-26М

Св-ОЗХ16Н9М2 ОФ-6, ФЦ-17

Св-0ЗХ16Н9М2 - - 600

08Х16Н11МЗ with 08Х16Н11МЗ

- - - - Св-04Х17Н10М2 (wire)

ОФ-6 550

09Х18Н9, 08Х18Н10 in any combination

- - - - Св-04Х19Н11МЗ (wire) 12Х18Н9 (plate)

ОФ-6

550

0ЗХ16Н9М2 with 0ЗХ16Н9М2

- - - - Св-0ЗХ16Н9М2 (wire)

ФЦ-17 550

12Х18Н10Т, 08Х18Н10Т with 10Х15Н36ВЗТ-ВД

ЭА-855/51 ЭА-582/23

- - Св-0ЗХ15Н35Г7М6Б - - 550

Table 8 Welding materials to fabricate welded joints of Categories Iн and IIн of parts made of austenitic steels with parts made of perlitic

and high-chromium steels

Characteristics of parts being welded

Grades of welding materials for preliminary overlaying of edges of parts made of perlitic

and high-chromium steels

Grades of welding materials for fabrication of weld

Steel grade Nominal part thickness in

welding loca-tion, mm

Coated welding electrodes for

manual arc over-laying

Welding wire for argon-arc overlaying

Coated welding elec-trodes for manual arc

welding


Up to 10 (inclusive)

-

-

ЭА-395/9

Св-10Х16Н25АМ6

All layers

08Х16Н11МЗ, 08Х18Н10 or 08Х18Н10Т with ВСт3сп5, 10, 15, 20 or 22К in any com-bination

over 10 ЭА-395/9 Св-10Х16Н25АМ6

ЭА-400/10У ЭА-100/10Т ЭА-З95/9* КТИ-7

Св-04Х19Н11МЗ Св-10Х16Н25АМ6 Св-ЗОХ15Н35ВЗБЗТ

Up to 6 (inclu-sive)

- - ЭА-395/9 Св-10Х16Н25АМ6

First layer

Over 6 КГИ-7 ЭА-395/9*

Св-З0Х15Н35ВЗБЗТ Св-10Х1бН25АМ6*

08Х16Н11М3, 09Х18Н9, 08Х19Н10 or 08Х18Н10Т with 12МХ, 12ХМ, 15ХМ, 10Х2М, 12Х1МФ, 15Х1МФ or 08Х13 Second and subsequent layers

А-1, А-1Т А-2, А-2Т ЭА-400/10У* ЭА-400/10Т**

Св-04Х17Н10М2 Св-02Х17Н10М2-ВИ Св-04ХГ9Н11МЗ**

А-1, А-1Т А-2, А-2Т ЭА-400/10У** ЭА-400/10Т**

Св-04Х19Н10М2 Св-02Х17Н10М2-ВИ Св-04Х19Н11МЗ


- - ЭА-395/9X КТИ-7

Св-10Х16Н25Ам6 Св-З0Х15Н35ВЗБЗТ

First layer

over 6 ЭА-395/9* Св-10X16Н25АМ6к Св-З0Х15Н35ВЗБЗТ

Second and subsequent layers

А-1, А-1Т, А-2, А-2Т


А-1, А-1Т ЭА-400710У** ЭА-400/10Т**

Св-04Х19Н10М2 Св-02Х17Н10М2-ВИ Св-04Х9Н11МЗ**

08Х16Н11МЗ, 09Х18Н9, 08Х18Н10 with 12Х1МФ, 15Х1МФ, 10Х2М

ЭА-400/10У* ЭА-400/10Т*

Св-04Х19Н11МЗ* А-2, А-2Т

08Х18Н10Т with 08Х14МФ


ЦТ-45 СВ-З0Х20Н45Г6М6Б-ВИ

_____________________________ *Only for temperatures not more than 500°С. ** Only for temperatures not more than 450°С.

Table 9

Welding materials used for welding of the weld roots of parts made of steel grades 15Х2МФА-А or 15Х2НМФА-А

Grades of welding materials

For automated hidden arc welding

Steel grades of parts being welded

Wire Flux.agent

Coated welding electrodes for manual arc welding

1БХ2МФА-А with 15Х2МФА-А 15Х2НМФА-А with 15Х2НМФА-А

Св-08АА-ВИ Св-0ЗАА-ВИ

АН-42М ФЦ-16А АН-42М

УОНИИ-13/45АА ЦУ-7А УОНИИ-13/45АА

It is allowed to include in one batch the fluxing agent of one grade from several melts provided all mass of fluxing agent batch is homogeneously mixed-up (as a whole or in proportional amounts)

2.11. It is allowed to consider shielding gas of one name, one kind, one brand (group) supplied according to one and the same standard or under one and the same specifications as a shielding gas batch.

2.12. Welding wire and filler tape should be stored under the condi-tions preventing their soiling, corrosion and damage.

2.13. Coated welding electrodes and fluxing agents after tempering should be stored in closed sacks made of waterproof fabric (polyethylene film) or in closed tare under rubber-sealed lid or in drying boxes at temperature of 80±20°С or in storage rooms at temperature not less than 15°С and relative air humidity not more than 50%.

2.14. In case of storage, after tempering (initial or repeated), in a package or in drying boxes as per Subsection 2.13, the shelf life of coated welding electrodes and fluxing agents and their service life without humidity check and additional tempering are not limited.

2.15. In case of storage, after tempering, in the storage rooms as per Subsection 2.13 the coated welding electrodes and fluxing agents may be used without humidity check and re-tempering within the timelines indicated in PED.

In this case the established timelines should not exceed:

• for welding electrodes with basic coating and designed for weld-ing of perlitic and high-chromium steels – 5 days;

• for other welding electrodes - 15 days.;

• for fluxing agents OФ-6 and OФ-10 - 3 days;

• for other fluxing agents - 15 days. 2.16. In case the welding electrodes and fluxing agents storage condi-

tions under Subsection 2.13 are violated or the timelines indicated in Subsec-tion 2.15 expire the welding electrodes and fluxing agents before use are sub-ject to humidity check and re-tempering.

2.17. In any cases where during the check the humidity value in coated electrodes or in a fluxing agent exceeds values established by stan-dards or specifications for the welding materials being checked, they should be subjected to re-tempering

2.18. Tempering quality of each setting of welding electrodes H-10, fluxing agents KФ-I6 and КФ-27, as well as welding electrodes УОНИИ-13/45А and УОНИИ-13/55 to be used for welding of parts made of steel grade 10X2M among themselves and with parts made of perlitic steels, is de-termined by hydrogen content in the overlaid metal or weld metal in accor-dance with the methodology of the leading interagency material study organi-zation.

At this, the hydrogen content in the overlaid metal (weld metal) in case of manual arc welding should not exceed 2.5 cm3 per 100 g, and in case of automated hidden arc welding it should not exceed 3.0 cm3 per 100 g. Should the results be negative the re-tampering of welding electrodes and fluxing agents is done followed by the determining of hydrogen content.

It is allowed, upon agreement with the leading interagency material study organization, to skip the determining of hydrogen content in the overlaid metal when individual batches of welding materials designated for welding of specific parts are checked.

2.19. If a batch of welding electrodes or fluxing agents was tempered in parts in different time, the requirements of Subsections 2.14-1.17 relate to each individual part.

2.20. Tempering modes of welding electrodes and fluxing agents be-fore use should correspond to the modes established in standards or specifi-cations for the welding materials of specific grades.

If the standards or specifications do not contain instructions regarding tempering temperature and hold-up time, before using the welding electrodes and fluxing agents, one should be guided by the instructions given in Table 10.

2.21. It is allowed to carry out tempering of welding electrodes not more than three times and the fluxing agents ОФ-6 and OФ-10 – not more than five times (not count in the tempering during fabrication). Number of tempering for other fluxing agents is not limited.

2.22. The date and modes of each tempering operation should be en-tered in a special log. It is allowed to indicate such data on labels or under marking on a package.

2.23. The tempered electrodes and fluxing agents should be trans-ported to the welding stations in a closed tare (rubber-sealed tare, waterproof paper bags or polyethylene sacks).

2.24. The welding electrodes should be given to welders in the amount necessary for one-shift assignment unless the PED establishes more rigid requirements. During the issue procedure the welding electrode grade should be checked by tags, welding electrode edge identification color or coating color. Austenitic welding electrodes and wire should be checked by a magnet.

2.25. A procedure for accounting, storage, issue and return of the welding materials is established by an instruction to be developed by the en-terprise carrying out welding (overlaying).

Table 10

Recommended tempering modes for coated welding electrodes and fluxing agents

Name of weld-ing materials

Grade of welding materials

Tempering temperature,

°С

Hold-up time,

h

УОНИИ-13/45А 400±20 3.0+0.5 УОНИИ-13/55 , 465 ±15* 3.0+0.5 Н-3,Н-6,Н-10,Н-23,Н-25,Н-20,РТ-45Б 465 ±15* 3.0+0.5

УОНИИ-13/45, УОНИИ-13/10Х13 400±20 2.5+0.5 ТМЛ1-1У, ТМЛ-3У, ТМУ-21У 400±20 2.0+0.5 ОЗС-6, МР-3, ОЗС-4, АНО-4 200±20 2.0+0.5 ЭА-400/10У, ЭА-400/10Т, ЭА-898/21Б, ЭА-902/14

135±15 2.0+0.5

ЭМ-959/52 465±15 5.0+0.5 А-1, А-2, А-1Т, А-2Т 135±15 2.0+0.5 ЭА-395/9, ЗИО-8 225±25 2.0+0.5 ЭА-855/51 360±20 2.0+0.5 ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А, ЦУ-2ХМ, ПТ-30, ЦЛ-20, ЦЛ-21, ЦЛ-32, ЦЛ-38, ЦЛ-39, ЦЛ-45, ЦЛ-48, ЦЛ-51, ЦЛ-52, ЦЛ-59,РТ-45А, РТ-45АА

360±20 2.0+0.5

Coated welding electrodes

ЦЛ-25/1, ЦЛ-25/2, ЦТ-10, ЦТ-15К, ЦТ-24, ЦТ-26, ЦТ-26М, ЦТ-45

330±120 1.5+0.5

АН-348А, АН-8, АН-348АМ 350±50 4.5+0.5 АН-42, АН-42М, АН-26, АН-26С б50±20 4.0+0.5 КФ-16, КФ-19, КФ-27, КФ-30, НФ-28М

725±25 3.0+0.5

ОФ-6 905±25 5+0.5 ОФ-10 960±10 5+0.5 ОСЦ-45 375±25 2+0.5 ФЦ-11 375±20 4+0.5 ФЦ-16,ФЦ-16А 620±20 4+0.5

ФЦ-17, ФЦ-19, ФЦ-21, -22 650±20 4+0.5

Fluxing agents

ФЦ-18 800±20 3+0.5

______________ *It is permitted to reduce the tempering temperature down to 400+20 0С, as agreed upon with the leading interagency material study organization.

2.26. The tempering of fluxing agents should be done in electric fur-naces on trays made of heat-resistant steels.

2.27. The tempering modes of fluxing agents should be monitored us-ing thermocouples installed directly in the fluxing agent layer. During temper-ing the layer thickness of fluxing agents ОФ-6 and ОФ-10 should not exceed 100 mm, and in case other fluxing agents it should be established in the PED. It is allowed to monitor the tempering mode of fluxing agents using furnace (dome) thermocouples provided their have been properly calibrated against the thermocouples installed in the fluxing agent.

3. Requirements to Welding Equipment

3.1. The welding and overlaying should be done using only workable, complete and adjusted installations, hardware and tools which ensure meet-ing all requirements of these BP, RFI and PED as well as the monitoring of the preset modes.

3.2. The direct current stations should be used for manual welding (overlaying). It is permitted to use alternating current stations for manual arc welding (overlaying) with rutile-coated welding electrodes.

3.3. Each automated argon-arc welding (overlaying) station should be connected to an independent welding current supply source.

3.4. The argon-arc welding (overlaying) equipment should provide for a possibility for smooth arc extinction. In case of manual argon-arc welding it is permitted to extinct arc by switching off welding current or by slow removal of the torch from the product.

3.5. The welding equipment for automated arc and electroslag welding (overlaying) should be furnished with a voltmeter, ammeter and devices which ensure preset welding speed, and the equipment for manual arc welding (overlaying) should be furnished with an ammeter.

It is allowed to use portable ammeters for periodic monitoring of weld-ing current value.

4. Requirements to Personnel

4.1. Welding, overlaying and tacking of parts and assembly units should be done by welders who passed qualification tests for performing welding operations in accordance with the requirements of the Rules for Qualification of Welders of Equipment and Piping of Nuclear Power Installa-tions (PNAE G-7-003-87) of Gosatomenergonadzor (hereinafter referred to as “Rules for Qualification of Welders”) and who have Welder’s Certificates issued according to the established format. At this, the welders are permitted to perform corresponding welding (overlaying) operations which are indicated in their certificates.

Besides, each welder should be given a personal stamp, which is to be registered in the TCU log or in the registration log of other controlling au-thority.

4.2. Welding, heating and heat treatment of welded joints and overlaid parts (items) should be carried out by employees who have done training and

passed qualification tests. The scope of training, test procedures and fre-quency of re-testing are determined by the enterprise conducting correspond-ing operations.

4.3. The engineers, who lead assembling, welding, overlaying, heating and heat treatment operations, should be qualified in accordance with the “Unified Provisions for Testing of Knowledge of Heads and Specialists of Go-satomenergonadzor of the USSR in Regulations, Standards and Instructions of Safe Conduct of Operations in Nuclear Power”.

5. Preparing and Assembling of Parts for Welding (O verlay-

ing)

5.1. General requirements 5.1.1. The parts (assembly units) should be prepared and assembled

for welding (overlaying) in accordance with the PED developed pursuant the requirements and guidelines of these BP and drawings.

5.1.2. The PED for assembling should indicate:

• the tools and equipment used for assembling;

• assembling procedure and sequence;

• way of fixing the parts;

• welding techniques, materials and modes for tack welding and welding of temporary engineered fixtures;

• dimensions, number and locations of tack welds;

• number of temporary engineered fixtures, their locations and sizes of welds where they are welded to the product;

• inspection techniques of the assembling quality;

• other necessary data to list all engineering and control operations.

5.1.3. It is allowed to incorporate the PED for assembling and the rele-vant PED for welding (overlaying).

5.2. Preparation for welding (overlaying). 5.2.1. The edges and surfaces of parts should be prepared for welding

by machining. 5.2.2. It is permitted to prepare edges of parts made of perlitic carbon

and manganese-silicon steels using oxygen, air-arc or plasma-arc cutting fol-lowed by machining (grinding, etc.) to remove traces of cutting.

5.2.3. Oxygen, air-arc and plasma-arc cutting may be permitted for preparing of edges of parts made of perlitic alloyed steels only as a prelimi-nary operation followed by mechanical removal of not less 1 mm thickness metal layer in case of alloyed steels with the guaranteed yield stress of up to 315 MPa at temperature 20°С inclusive; and not less than 2 mm in case parts made of steels with the guaranteed yield stress of more than 315 MPa. In do-ing so, in necessary cases to prevent crack formation the cutting is done with preliminary heating of metal in accordance with the PED guidelines.

5.2.4. It is permitted to prepare the edges of parts made of austenitic steels using plasma-arc or powder-flame cutting followed by removal of not less than 1 mm layer of metal by machining.

5.2.5. The shape and structural elements of part edges prepared for welding should correspond with the requirements of these BP or drawing.

5.2.6. When preparing for butt joining of parts with different nominal thickness a smooth transition (bevel) should be made on the thicker parts as per the requirements of NPI Rules.

5.2.7. When preparing the tubes of the same nominal diameter and nominal wall thickness for butt welded joints having one-side grooving the tube ends should be calibrated (bored or expanded) to achieve the given in-ner diameter (see Subsection 12.11).

5.2.8. The edges (surfaces for overlaying) and adjacent sections of parts prepared for welding should be cleaned from dross, rust, paint, oil and other surface soiling. The width of the above sections should be not less than 20 mm in cases where the parts are prepared for arc welding (overlaying) and not less than 50 mm in cases where parts are prepared for electroslag weld-ing.

5.3. Assembling. 5.3.1. All parts received for assembling and assembly units should be

marked and/or supplied with documentation to confirm that they have been accepted by the Technical Control Service. The type of marking is determined by the PED or the manufacturing enterprise (assembling organization).

5.3.2. The assembling of tubes and other cylindrical or conical parts to make annular butt welds should be done in accordance with the PED re-quirements and using the welding equipment or assembling and welding equipment and tooling which ensure concentricity of the parts (assembly units) being assembled.

5.3.3. It is allowed to use arc coated electrode welding or argon-arc welding to fabricate tack welds and welding of temporary engineered fixtures.

While assembling parts for argon-arc or electron-beam welding (in-cluding argon-arc welding of the weld root) the tack welds should be made by argon-arc welding.

5.3.4. The tack welds should be made by welders who have permits to fabricate joints requiring tacking.

5.3.5. To make tack welds the welding materials indicated in Subsec-tion 2.4 should be used.

5.3.6. Defective tack welds should be removed by machining (grind-ing, etc.). In cases described in the PED regarding joints of parts made of per-litic steels it is allowed to remove the defective tack welds by arc-air gouging.

5.3.7. It is not permitted to tack the locations of crossing or coupling of two or several joints to be welded.

5.3.8. Welding of temporary engineered fixtures is permitted only in cases indicated in the drawings or PED. At this, the following should be speci-fied: the steel grade, shape, dimensions, number and locations of the above fixtures, qualification of welders making welding of the fixtures, welding mate-rials, techniques and modes of welding and heating.

The use of temporary engineered fixtures while assembling parts made of austenitic steels and iron-nickel alloys is permitted where the nominal thickness of parts is not less than 6 mm.

5.3.9. Tack welding and welding of temporary engineered fixtures while assembling parts made of alloyed and high-chromium steels should be done with heating of metal in the welding zone according to the mode estab-lished for a given welded joint except for the cases where the welding is done with the use of austenitic filler materials.

During tacking the heating is not mandatory in case of welded joints, which weld root is made by argon-arc welding without heating.

5.3.10. While assembling parts made of perlitic steels and/or high-chromium steels the temporary engineered fixtures in use should be made of steel of the same grade that the parts being assembled; and in case assem-bling of parts made of austenitic steels, iron-nickel alloys and/or two-ply steels (with a fixture to be welded to the clad layer) the fixtures should be made of steel grade 08Х18Н10Т.

In cases described in the PED it is allowed to use temporary engi-neered fixtures made of steels, which are close in chemical composition and mechanical properties to the “indicated steels” as well as to use fixtures made of carbon steels in case of assembling the parts made of austenitic steels and/or two-ply steels.

5.3.11. The following should be used for welding of temporary engi-neered features to parts (assembly units) made of perlitic steels without cor-rosion resistant coating:

• the same welding materials that are used for tack welds pursuant Subsection 2.4, the base metal heating requirements para. 5.3.9 being met;

• coated welding electrodes ЗИО-8, ЦЛ-25/1, ЭА-395/9 or ЦГ-10 or welding wire Св-10Х16Н25АМ6 or Св-07Х25Н13 without heating of the base metal.

5.3.12. The following should be used for welding of temporary engi-neered fixtures to parts (assembly units) made of high-chromium steels:

• coated welding electrodes or welding wire permitted for fabrica-tion of welded joints of parts made of corresponding steel grade or coated welding electrodes ЦЛ-51 or welding wire Св-01Х12Н2-ВИ (two latter filler materials are used independently of the as-sembled parts’ steel grades) – to weld fixtures made of high-chromium steels, the base metal heating requirements of para. 5.3.9 being met;

• coated welding electrodes ЭА-395/9, ЦТ-10, ЦЛ-25/1, ЦЛ-25/2, ЗИО-8 or welding wire Св-10Х16Н25АМ6 or Св-07Х25Н13 – to weld fixtures made of carbon and high-chromium steels to nio-bium non-containing steels without heating of the base metal;

• coated welding electrodes ЦЛ-25/1, ЦЛ-25/2, ЗИО-8 or welding wire Св-07Х25Н13 – to weld fixtures made of high-chromium steels to niobium-containing steels without heating.

5.3.13. The following should be used for welding of temporary engi-neered fixtures to parts (assembly units) made of austenitic steels:

• coated welding electrodes and welding wire permitted for fabrica-tion of welded joints of parts made of corresponding steel grades - to weld fixtures made of austenitic steel;

• coated welding electrodes ЭА-395/9 and ЦГ-10 or welding wire Св-10Х16Н25М6 – to weld fixtures made of carbon steels.

5.3.14. Coated welding electrodes and welding wire permitted for fab-rication of welded joints of parts made of a corresponding steel grade should be used for welding of temporary engineered fixtures to parts made of iron-nickel alloys.

5.3.15. Coated welding electrodes or welding wire permitted for fabri-cating the upper layer of the corresponding corrosion resistant coating should be used for welding of temporary engineered fixtures to the clad layer (corro-sion resistant coating) of parts made of two-ply steels.

At this, the preliminary two-layer overlay should be fabricated on the edges of fixtures made of carbon steels, the following requirements being met:

• in case there is niobium or titanium in the corrosion resistant coat-ing metal the first layer of the overlay should be made with coated welding electrodes ЦЛ-25/1 or ЗИО-8 or with welding wire Св-07Х25Н13 and the second layer should be made with welding electrodes ЦТ-15К or ЭА-898/21Б or with welding wire Св-04Х20Н10Г2Б or Св-08Х19Н10Г2Б;

• if there is no niobium or titanium in the corrosion resistant coating metal, both layers are fabricated with coated welding electrodes ЦЛ-25/1 or ЗИО-8 or with welding wire Св-07Х25Н13.

5.3.16. The surface of parts in the fixture welding locations should be free preliminary cleaned from dross, rust, paint, oil and other soiling.

5.3.17. The welds of temporary engineered fixtures should be located at a distance of not less than 60 mm from the edges subject to welding. It is allowed to reduce this distance down to 30 mm in case of assembling the parts made of carbon and manganese-silicon steels.

5.3.18. Temporary engineered fixtures are removed by machining. At this, in case of parts made of carbon and manganese-silicon steels it is al-lowed to remove temporary engineered fixtures completely by oxygen or air-arc cutting without deepening into the base metal and followed by grinding of parts’ surfaces to remove traces of cutting.

It is allowed to partially remove temporary engineered fixtures on parts made of austenitic steels; they are removed by oxygen (powder flame), plasma-arc or air-arc cutting. At this, the remaining part of the fixture should be not less than 4 mm high and is subject to subsequent removal by machin-ing.

While removing temporary engineered fixtures it is allowed to partially remove their weld metal. In cases where the temporary engineered fixtures are welded with austenitic filler materials to parts made of perlitic steels and high-chromium steels, as well as in cases where the above materials are used to weld fixtures made of carbon steels to the parts made of austenitic steels, it is allowed to partially remove weld metal on the side which will not be in contact with operating environs, but if the corrosion resistant coating is to be overlaid subsequently, the weld metal is allowed to be partially removed on both sides.

5.3.19. If the gap between would-be welded edges (shoulders) of the assembled parts does not meet the established requirements and the design documentation does not set forth more rigid requirements, it is allowed to per-form the following operations:

• in case of gap exceeding the established guidelines not more than 0.5 mm of nominal base metal thickness of edges to be welded but not more than 10 mm – the overlaying of edges (one or two) with coated welding electrodes or welding wire (for argon-arc overlaying) of grades, which are intended for fabrication of a given welded joint. In case of overlaying only the root sections of the joined parts made of perlitic steels it is allowed to use filler materials used for welding of weld root of the given joint; the over-laying should be done along with heating if such treatment is de-signed for the welded joint being fabricated; after overlaying the edges are subject to machining to achieve the designed geome-try; at this, the parts made of alloyed and high-chromium steels should be preliminary (before machining) heat treated using the inter-tempering mode if the heat treatment of the given welded joint is envisaged by these BP and/or PED;

• in case of gaps, which are less than the established values – ma-chining (grinding, undercutting followed by grinding, etc.) of the edges prepared for welding;

• in cases where the amount of metal the edges of parts made of carbon and manganese-silicon steels are overlaid with, but not more than 20 cm3, - heating during overlaying and heat treatment may not be done irrespectively of the nominal thickness of parts being assembled.

5.3.20. It is not permitted to increase sizes of parts by overlaying. 5.3.21. The assembling on the remaining backing rings is permitted for

tubular joints among themselves or with other cylindrical parts of piping Groups B and C with nominal outer diameter more than 300 mm accessible for welding only on one side in cases where the welding without backing rings is not possible or technically inexpedient due to the design features of the structure.

The use of welded joints with backing rings should be agreed upon with the leading material study organization and specified in the design documentation.

It is not permitted to use the remaining baking rings with unwelded cross-sectional parting.

5.3.22. The remaining backing rings should be made of the following materials:

• for welding of parts made of the same grade of material – the grade of material as the parts being welded;

• for welding of parts made of perlitic steels of different grades, as well as for welding of parts made of high-chromium steels of dif-ferent grades – the less alloyed steel out of the steel grades being combined;

• for welding of parts made of austenitic steels of different grades, as well as for welding of parts made of austenitic steels with parts made of perlitic steels or high-chromium steels with preliminary overlaying of edges with austenitic filler materials – the steel grade 08Х18Н10Т or the same grade of austenitic steel as one of the parts being welded;

• for welding of parts made of perlitic steels with parts made of high-chromium steels – the high-chromium steel of the same grade as one of the parts being welded where the welded joint is fabricated with high-chromium filler materials or the austenitic steels (08Х18Н10Т) where the welded joint is fabricated with aus-tenitic filler materials;

• for welding of parts made of iron-nickel alloys among themselves and with parts made of austenitic steels – the iron-nickel alloys.

N o t e . It is allowed to use the remaining backing rings made of carbon steel to fabricate welded joints of parts made of perlitic steels irrespec-tively of their grade at operating temperature of up to 450°С. 5.3.23. In the butt joints assemble for welding the edge displacement

(misalignment of surfaces of parts being joined together) and dulling, gaps between matched edges (shoulders) of parts, as well as between a backing ring and the pipe should meet the requirements of these BP, RFI and draw-ings.

5.3.24. In the joints assembled for welding the geometric position of parts (bending or perpendicularity of axes, etc.) should correspond to the re-quirements of the design documentation. It is not permitted to assembly pipes using tightening. The latter requirement does not cover the closing welds fab-ricated with cold tightening provided the pipes to be welded are rigidly fixed.

5.3.25. After assembling the edges and adjacent surfaces grinded dur-ing preparing for welding are subjected to secondary mechanical grinding (as necessary). The grinding should be done by an abrasive wheel or steel brush.

The necessity to degrease edges is specified in the PED (with identifi-cation of materials used for degreasing).

5.3.26. After the assembling for manual arc coated electrode welding the surfaces of parts made of austenitic and iron-nickel steels adjacent to the edges should be protected from metal spray. At this, the width of protected zone should be not less than 100 mm both sides of the edges prepared for welding. The same protection is recommended in case of welding of tempo-rary engineered fixtures to the surfaces of parts made of austenitic steels. The protection techniques are to be specified in the PED.

The requirement of this paragraph is not mandatory if the fabricated welded joints are subject to subsequent machining to remove a metal layer of not less than 0.5 mm thick in the specified zone.

5.3.27. In cases where it is necessary to transport the assembled parts (assembly units) to a welding station the conditions should be arranged for to prevent destruction of tack welds or temporary engineered fixtures welds, as well as deformation, damage to and soiling of parts assembled for welding.

6. Welding

6.1. General Requirements. 6.1.1. Welding of parts (assembly units) should be carried out in ac-

cordance with the PED developed pursuant the requirements and guidance of these BP and drawings.

The PED should establish:

• welding (overlaying) techniques;

• qualifications of welders;

• types of welded joints to be fabricated;

• welding current type and polarity;

• welding equipment in use;

• combinations of grades of base and welding (overlaying) materi-als;

• necessity, techniques and modes of preliminary and concurrent heating during welding (overlaying);

• spatial positions of welding (overlaying);

• assortment of filler materials;

• welding (overlaying) modes with regard to specific welded joints (overlays);

• techniques and modes of preliminary and concurrent heating dur-ing welding (overlaying) (if specified);

• sequence of beads and weld and overlay layers (as necessary);

• types of heat treatment of welded joints and overlaid parts (if such is specified);

• keeping conditions of welded joints (overlaid parts) since comple-tion of welding (overlaying) until beginning of heat treatment;

• techniques and scope of in-process inspection of welding (over-laying).

Exemplary welding modes to fabricate certain welded joints are given in Attachment 2.

6.1.2. The following welding (overlaying) techniques may be used to fabricate welded joints:

• automated hidden arc welding (overlaying);

• manual arc coated electrode welding (overlaying);

• automated, semi-automated and manual argon-arc welding (over-laying);

• electroslag welding;

• vacuum electron-beam welding;

• plasma welding (overlaying);

• diffusion welding (only for joining the steel and zirconium fuel channel tubes).

The argon-arc welding should mean as argon-shielded welding as the welding under mixtures of argon and helium (at any ratio), with welding car-

bonic acid gas of up to 25% (except for welding of austenitic steels and iron-nickel alloys), with oxygen of up to 5%.

It is permitted to apply carbonic acid gas machine welding with weld-ing wire Св-08Г2С to fabricate welded joints of Category III of parts made of carbon and manganese-silicon steels.

6.1.3. The welding (overlaying) techniques, which are not listed in para. 6.1.2, are permitted for application after relevant qualification tests pur-suant NPI Rules, Subsection 3.4.

6.1.4. It is permitted to apply two or several welding (overlaying) tech-niques out of the list given in para. 6.1.2 to fabricate one welded joint (com-bined welding).

6.1.5. Welding (overlaying) should be carried out in the conditions, which ensure that the requirements of PED related to protection of welding location from any impacts to welding quality (atmospheric precipitation, etc.) are met.

Welding operations to manufacture equipment and assembly parts of piping are not permitted at the ambient air temperature below 0°С.

It is allowed to carry out welding in assembling conditions at the ambi-ent air temperature not lower than -15°С.

6.1.6. When the ambient air temperature is below 0°С welding (over-laying) of perlitic steels and high-chromium steels should be carried out with additional or increased heating. In case of welded joints fabricated at the am-bient air temperature above 0oC without heating the minimum temperature of preliminary and concurrent heating should be not less than 50°С (additional heating). In case of welded joints fabricated with mandatory heating the mini-mum heating temperature, pursuant to this Document and PED, should be increased by 50°С (increased heating).

It is allowed to weld parts made of austenitic steels and iron-nickel al-loys without heating at the ambient air temperature not lower than 5°С. At the lower ambient air temperature the minimum heating temperature should not be below 0°С.

6.1.7. Before welding (overlaying), if necessary, the secondary grind-ing and degreasing of edges and adjacent surfaces is done. At this, the de-greasing is compulsory for all parts made of austenitic steels assembled for welding. In other cases the degreasing necessity is established by the PED.

6.1.8. The grades of welding and overlaying materials in use should correspond to those indicated in Tables 1 through 9 of these BP.

6.1.9. During fabrication of multi-pass welds and overlays, after each bead, the weld and groove surfaces should be thoroughly cleaned from slag, metal spray and visually inspected by welder whether they have cracks, non-permitted slag (tungsten) inclusions, pores, roughness (undercuts, bulges, pockets between beads) and other defects. The revealed defects should be eliminated before welding is resumed. In case of machine welding the welder’s control over individual beads may be done in the process of welding (without its termination).

6.1.10. All shrink holes (craters) should be thoroughly sealed or brought up into removable envelope of metal or welded cleats.

6.1.11. Welding of angle welds, which are subject to leaktightness re-quirements as established in drawings should be fabricated not less than in two layers.

6.1.12. In case of two-sided welding (including the fabrication of a backing bead it is permitted to remove partially or completely the root section of the weld before welding on the second side.

In case of two-sided welded joint (or single-sided weld with a backing root bead) it is permitted to carry out grooving and welding on one side in se-quence followed by grooving and welding on another side.

In case of two-sided welding of parts made of austenitic steels and iron-nickel alloys it is recommended to make beads facing the operating envi-rons as the final pass. The necessity to follow this recommendation is deter-mined by the PED.

6.1.13. While making multi-pass welds of welded joints of parts made of austenitic steels and iron-nickel alloys the welding process should be ter-minated after each pass until the metal cools down to not higher than 100°С in the welding zone.

When the austenitic filler materials with specified ferritic phase content are used it is permitted to increase the above temperature limit up to 250°С.

The temperature measurement points are established in the PED. 6.1.14. When welding is completed the weld surface and adjacent

base metal zone should be cleaned from slag and metal spray at the width necessary for follow-up inspection.

6.1.15. Manual arc welding (overlaying) carried out with welding elec-trodes which cores are made of austenitic steels should be done in narrow beads with width of not more than three diameters of the welding electrodes in use.

6.1.16. The weld roots of welded joints of parts made of steel grade 08Х18Н12Т, as well as pipes made of carbon steels with nominal wall thick-ness of 12 mm are recommended to fabricate using a filler wire.

6.2. Heating during welding (overlaying). 6.2.1. The necessity and minimum temperature of preliminary and

concurrent heating of parts during welding of parts (assembly units) made of perlitic and high-chromium steels depending of a steel grade and thickness of parts being welded are established according to Table 11.

In specific cases the PED may clarify (correct) the requirements of this Subsection as regards heating temperature and thickness of parts being welded for which the heating is required.

In cases not covered by Table 11 the necessity and minimum heating temperature are established by the PED (as agreed upon with the leading material study organization).

The heating is not done (except for the cases indicated in the PED) during welding and overlaying (including reinforcing overlaying) of parts made of austenitic steels and iron-nickel alloys.

6.2.2. The maximum heating temperature should not exceed the es-tablished minimum one more than 150°С.

6.2.3. When the parts made of different steel grades (out of the listed in Table 11) are welded the minimum heating temperature is assumed with regard to the steel for which the heating at higher temperature is envisaged.

6.2.4. The parts of different nominal thickness are welded the mini-mum heating temperature is established in the PED, and if there are no such guidelines in the PED it is selected as in Table 11 basing on the nominal thickness of the thicker part.

6.2.5. In cases where the parts made of steel grades 12Х2МФА, 15Х2МФА, 15Х2МФА-А and 18Х2МФА are overlaid with perlitic filler materi-als the minimum heating temperature values for overlaying of the first layer should not be less than 200°С and not less than 150°С for subsequent layers.

6.2.6. Upon agreement with the leading material study organization, in case of combined welding of pipes requiring heating the argon arc welding of weld root is permitted to carry out without heating irrespectively of the pipe steel grades and thickness.

6.2.7. In case of preliminary overlaying of part edges made of perlitic and high-chromium steels with austenitic filler materials the heating is done only for overlaying of the first layer. The necessity and minimum heating tem-perature are established pursuant Table 11 (as for the welding of parts being overlaid).

Table 11 Minimum preliminary and concurrent heating temperature during welding

Minimum heating temperature, °С Steel grades of

parts being welded

Nominal thick-ness of parts being welded,

mm

For arc weld-ing

For electroslag welding

For overlaying of edges with austenitic filler

materials Ст3сп5, 10, 15, 15Л, 20, 20Л, 20К

Up to 100 (inclusive) Over 100

-

100

- -

- -

22К, 25Л Up to 60 (inclusive) Over 60

Heating is not required*

100

-

-

10ХСНД


Heating is not required

100

-

-

10ХН1М Up to 40 (inclusive) Over 40


100

-

-

50 15ГС, 16ГС, 09Г2С, 20ГСЛ, 16ГНМА



150

-

-

150 10ГН2МФА. 10ГН2МФА, 15ГНМФА


50

120

-

100**

-

100

12МХ, 12ХМ 15ХМ

Up to 10 (inclusive) Over 10 up to 30 (inclusive) Over 30


150

200

-

50

100

-

100

150

20ХМ, 20ХМЛ, 20ХМА


-

200

-

100

-

150 10Х2М Up to 6

(inclusive) Over 6

-

100

- -

-

100 12Х1МФ Up to 6

(inclusive) Over 6 up to 30 (inclusive) Over 30

-

200

250

-

150

200

-

100

150 15Х1М1Ф. 15Х1М1ФЛ


-

250

300

-

200

250

-

150

200 15Х2НМФА, 15Х2НМФА-А,

Irrespectively of thickness

150 150 150

15ХЗНМФА 15ХЗНМФ-А

The same 150 150 150

12Х2МФА Up to 80 (inclusive) Over 80

200

200

100

150

150

150 15Х2МФА, 15Х2МФА-А, 18Х2МФА


200 150 150

08Х13, 05Х12Н2М


-

100

- -

-

100 06Х12НЗД


-

100

- -

-

100 12Х11В2МФ Up to 30

(inclusive) Over 30

250

300

150

200

250

250

___________________ * The necessity of heating during welding of parts made of steel grade 22K is established upon agreement with the leading material study organization ** The heating is permitted to avoid in case thickness of up to 150 mm inclu-sive.

6.2.8. Welding of parts made of perlitic and high-chromium steels (as among themselves as with parts made of austenitic steels), which edges have been preliminary overlaid with austenitic filler materials, is carried out without heating.

6.2.9. In cases where the part edges made of perlitic steels have been preliminary overlaid with high-chromium filler materials the minimum heating temperature is established with regard to the parts made of perlitic steel but not lower than 100°С.

6.2.10. Welding of parts made of high-chromium steels with parts made of perlitic steels where the edges have been preliminary overlaid with high-chromium filler materials is carried out with heating, which necessity and minimum heating temperature are established with regard to the part made of high-chromium steel.

6.2.11. Overlaying of corrosion resistant coating on parts (items) made of carbon and manganese-silicon steels is done without heating.

6.2.12. In case of overlaying of corrosion resistant coating on parts (items) made of alloyed steels the necessity and minimum heating tempera-ture are established depending on steel grade and thickness of parts being welded are established pursuant Table 12, and if it does not contain the nec-essary guidance – pursuant the PED.

Table 12

Minimum heating temperature for overlaying of the first layer of corrosion re-

sistant coating

Steel grade of the part being

overlaid

Type of filler material Nominal thickness of part being overlaid, mm

Minimum heat-ing tempera-

ture, oC 20ХМА Welding tape

Coated welding elec-trodes, wire

Irrespectively of thickness Up to 100 (inclusive) Over 100

- -

100 10ХН1М 10ГН2МФА 10ГН2МФЛ

Welding tape Coated welding elec-trodes, wire

Up to 100 (inclusive) Over 100 Up to 50 (inclusive) Over 50

- 50

- 50

15Х2НМФА 15Х2НМФА-А 15ХЗНМФА

Welding tape Coated welding elec-trodes, wire

Up to 100 (inclusive) Over 100 Up to 100 (inclusive) Over 100

- 50

50 100

12Х2МФА 15Х2МФА 15Х2МФА-А 18Х2МФА

Welding tape, coated welding electrodes, wire

Irrespectively of thickness 150

In case of overlaying of two-layer and multi-layer corrosion resistant coating the heating is carried out only for overlaying of the first layer.

6.2.13. When the parts made of two-ply steel with the basic layer of carbon and manganese-silicon steels or steels 10ГН2МФА and 10ГН2МФАЛ the separating and protective overlays are fabricated without heating.

6.2.14. The preliminary and concurrent heating of the parts (items) be-ing welded should be done using electric, gas or other heaters, which provide for the required heating of metal over whole length (perimeter) of the joint or all area of overlay (the area sizes are established in the PED).

In case of local heating of branches less than 100 mm in length the width of the heating zone L should be equal to the branch length, and in case local heating of bottoms, flanges and plugs it should be established by the PED.

6.2.15. In case of local heating of cylindrical parts (barrels, pipes, branches, etc.) with annular welded joints the width of the heating zone L within which temperature should not be less than the minimum heating tem-perature indicated in Table 12 and not higher that the maximum temperature

indicated in para. 6.2.2 both sides of the weld axis should be L DS≥ , where D and S are the nominal outer diameter and wall thickness of the parts being welded. The permissible deviations from the above requirement, as well as minimum sizes of zone L, where the process is carried out with local heating of other welded joints and overlay is established in the PED but in any case the width of zone L should not be less than 100 mm.

6.3. Welding of parts made of different structural steel classes. 6.3.1. For fabrication of welded joints of parts made of different struc-

tural steel classes, including the preliminary overlaying of edges, the welding materials pursuant Tables 2, 4, 6 and 8 should be used.

6.3.2. When parts made of austenitic steels are welded with parts made of carbon and manganese-silicon steels of nominal thickness more than 10 mm the edges of parts made of carbon and manganese-silicon steels should be preliminary overlaid (except for the cases pursuant the Note 5 to Table 4); after machining the overlay thickness should be 6 ± 2 mm for man-ual arc coated electrode welding and argon-arc welding and 9 ±2 mm for automated hidden arc welding. It is allowed to fabricate joints by manual arc coated electrode welding and argon-arc welding with the edges as overlaid for automated hidden arc welding.

6.3.3. In case welding of parts made of austenitic steels with parts made of alloyed and high-chromium steels with nominal thickness of more than 6 mm the edges of parts made of alloyed and high-chromium steels should be preliminary overlaid (except for the cases described in Note 5 to Table 4); tafter machining he overall thickness of the overlay should be 9+2 mm, the first layer thickness being 3+1 mm.

6.3.4. While making angle, tee-joints and lap welded joints of parts made of carbon and manganese-silicon steels the necessity of preliminary overlaying of edges pursuant para. 6.3.2 is determined by the design height of the angle weld (instead of nominal thickness). For other steel classes the de-sign height of the angle weld at which it is necessary to preliminary overlay edges is established by the PED.

6.З.5. In case of automated hidden arc welding of parts made of per-litic steels with parts made of high-chromium steels the edges of parts made of perlitic steels should be preliminary overlaid with coated welding electrodes intended for welding of parts made of high-chromium steel. The above overlay should be made not less than in three layers and have the overall thickness not less than 7 mm after machining.

6.3.6. In case of welding in the assembling conditions of pipes made of different steel structural classes where there is no preliminary overlay on edges made at the manufacturing enterprise the special adapting pipes manufactured in factory conditions should be used. The use of said adapting pipes should be provided for in the design documentation.

An adapting pipe represents an assembly unit made of two pipe sec-tions welded together, each section being in correspondence, in terms of steel grades, with the respective pipes to be joined together.

The adapting pipe length is determined by the permissible distance between welds in accordance with NPI Rules.

6.3.7. When the welds made by austenitic and perlitic filler materials are crossing the weld to be made with perlitic filler materials should be fabri-cated first.

6.3.8. The width of weld metal or preliminary overlay surface, made with welding electrodes ЭА 395/9, ЦТ-10 or welding wire Св-10Х16Н25АМ6, to be facing water, steam-water and steam coolant environs should not ex-ceed 7 mm.

6.4. Welding of parts made of two-ply steel. 6.4.1. While preparing the parts made of two-ply steel for welding the

clad layer should be removed from the sections adjacent to the edges subject to welding (on their opening side), as well as from the angle weld locations except for the cases described in this Subsection.

The width of clad layer zone to be removed should not be less than 5 mm for manual arc coated electrode welding and argon-arc welding, and not less than 10 mm for automated hidden arc welding. In case of angle and tee-joints the clad layer zone to be removed should go beyond the angle weld boundary not less than the indicated width values.

In case of welded joints which basic layer is made of perlitic steel and is subject to ultrasonic and/or radiographic inspection before the clad layer is applied, the width of clad zone to be removed should be such to provide for a possibility of the above inspection.

6.4.2. While making welded joints with removal of clad layer, first weld-ing of the base layer made of perlitic steel is done and then the clad layer is welded (overlaid).

6.4.3. Welding of base layer should be done with welding materials designed for welding of parts made of the base layer steel.

6.4.4. Welding (overlaying) of the clad layer includes fabrication of separating and protective overlays (Fig. 1).

Fig. 1. Grooving and welded joints of parts made of two-ply steels: 1 - weld; 2 – separating overlay; 3 – protective overlay

6.4.5. The separating overlay should be made with coated welding electrodes ЦЛ-25/1 or ЗИО-8, welding wire Св-07X25Н13 (for argon-arc overlaying), welding tape Св-07Х25Н13 in combination with fluxing agent ОФ-10 or with welding tape СВ-04Х20Н10Г2Б in combination with fluxing agent ФЦ-18 (for automated hidden arc overlaying). At this, the sizes of the welded joint elements should correspond to those indicated on Fig. 1.

In case the weld reinforcement is to be removed the weld reinforce-ment sizes indicated on Fig. 1 are established by the design organization upon agreement with the leading material study organization.

6.4.6. The protective overlay should be made in not less than two lay-ers with the following welding (overlaying) materials:

• in case the welded joint is not subject to heat treatment – with the welding materials as per para 6.4.5 or coated welding electrodes ЭА-400/10У, ЭА-400/10Т, ЦТ-26, ЦТ-26М, ЭА-898/21Б, ЦТ-15К, ЦЛ-25/2, or welding wire Cв-04XI9H11M3, Св-04Х20Н10Г2Б, Св-08Х19Н10Г2Б (for argon-arc overlaying) or welding tape Cв-04XI9H11M3, Св-04Х20Н10Г2Б, Св-08Х19Н10Г2Б in combina-tion with fluxing agents ОФ-10 or ФЦ-18 (for automated hidden arc overlaying) ;

• in case the welded joint is subject to heat treatment – with coated welding electrodes ЭА-898/21Б or ЦТ-15К, or welding wire Св-04Х20Н10Г2Б or Св-08Х19Н10Г2Б (for argon-arc overlaying) or welding tape Св-04Х20Н10Г2Б or Св-08Х19Н10Г2Б in combina-tion with fluxing agents ОФ-10 or ФЦ-18 (for automated hidden arc overlaying).

For cases specified in the PED it is permitted to fabricate the protec-tive overlay with welding tape Св-04Х20Н10Г2Б in one layer.

6.4.7. The protective and separating overlays to be made by manual arc coated electrode welding should be fabricated in individual beads of width, which is not more than three diameters of the welding electrode core in use. In cases specified in the PED it is permitted to increase the width of the sepa-rating overlay beads up to four diameters of the welding electrode core.

6.4.8. The welding of parts with nominal base layer thickness (for an-gle and tee-joints – with design angle weld height) of up to 10 mm inclusive for carbon and manganese-silicon steels and up to 6 mm inclusive for alloyed steels is permitted to do with coated welding electrodes ЭА-855/51 or ЦТ-45, or with welding wire Св-0ЗХ15Н35Г7М6Б or Св-0ЗХ20Н45М6Г6Б-ВИ (for argon-arc welding) over all thickness on any side without removal of the clad layer.

If the clad layer metal does not contain niobium and the welded joint is not subject to heat treatment, it is permitted to fabricate the base layer with coated welding electrodes ЭА-395/9 or ЦТ-10, or welding wire Св-10Х16Н25АМ6 (for argon-arc welding) up to the level overlapping the clad layer not less than by 1 mm, and to fabricate the separating and protective overlays with coated welding electrodes ЭА-400/10У, ЭА-400/10Т, ЦТ-26, ЦТ-26М or welding wire Cв-04X19H11M3 (for argon-arc overlaying) in not less than two layers.

6.4.9. It is allowed to fabricate the one-sided welded joints, which are not accessible for welding on the clad layer side, without removing the clad layer with preliminary overlaying of edges pursuant Figs. 2 and 3.

Fig.2. Preliminary overlaying of part edges made of two-ply steels with clad layer which does not contain niobium: 1 – carbon or manganese-silicon steel; 2 – clad layer; 3 – homogeneous overlay made with welding materials as per Table 4; 4 – alloyed steel; 5 – double overlay made with welding materials as per Table 4.

Рис.3. Preliminary overlaying of part edges made of two-ply steels with clad layer which contains niobium: 1 - carbon or manganese-silicon steel; 2 - clad layer; 3 - homogeneous overlay made with welding materials as per Table 4; 4 – separating bead; 5 - alloyed steel; 6 - double overlay made with welding materials as per Table 4.

At this, if the clad layer metal contains niobium a separating bead (see

Fig. 3) should be made to avoid a direct contact of the clad layer with the pre-liminary overlay metal on edges. The separating bead should be fabricated with coated welding electrodes ЦЛ-25/1 or ЗИО-8, or with welding wire Св-07Х25Н13 (for argon-arc overlaying).

Thickness of the first layer and/or total thickness of the preliminary overlay should meet the requirements of para. 6.3.2, 6.3.3.

6.4.10. After the preliminary overlay as per para. 6.4.10 is complete the heat treat of parts in the overlay zone is done (if the heat treatment is en-visaged by Section 8 and/or the PED) followed by machining.

6.4.11. The welding of parts with overlaid edges should be done with welding materials in accordance with Table 4

6.4.12. In case of welding of parts made of two-ply steel with the parts made of perlitic steel the clad layer is removed in accordance with para 6.4.1, then the welded joint is fabricated with the welding materials designed for welding of parts made of the corresponding steel grades followed by the re-storing of the clad layer or without it.

6.4.13. When the parts made of two-ply steel are welded with those made of high-chromium steel the clad layer is removed as per para. 6.4.1, then the welded joint is fabricated with the welding materials designed for welding of parts made of the corresponding steel grades (with the preliminary edge overlaying pursuant Table 2 or PED) followed by the restoring of the clad layer as per para. 6.4.4-6.4.6.

6.4.14. When the parts made of two-ply steel are welded with the parts made of austenitic steel, the preliminary overlaying is done on their edges as per para. 6.4.10, and then the welded joint is fabricated with the welding ma-terials in accordance with Table 4.

6.4.15. It is permitted to weld the protective shells as well as non-pressurized parts to the clad layer of the two-ply steel parts without removal of the clad layer in the angle welds’ locations if the design height of the angle weld does not exceed 8 mm. In doing so the welding materials indicated in Tables 3 and 4, designed for the relevant cases, should be used (the clad layer is considered as austenitic steel).

6.5. Electroslag welding. 6.5.1. Parts made of manganese-silicon and alloyed steels, as well as

of high-chromium steel, should be sent for electroslag welding after complete heat treatment (normalization or hardening followed by tempering) and parts made of two-ply steel should be sent for welding having a clad layer made at a distance sufficient for installation of water-cooled slide blocks and cleats, as well as for subsequent ultrasonic testing.

6.5.2. The electroslag welding should not be interrupted until the welded joint is fabricated.

In case of forced termination of the process it is allowed to resume welding after the section with a shrink hole is removed. In case of welding of parts made of alloyed steel such section is removed after a preliminary tem-pering of the completed welded joint section.

In case of welding of parts made of austenitic steel, where the weld section having a shrink hole has been removed, it is mandatory to carry out austenization after the completion of the welded joint.

6.5.3. While fabricating annular welded joints of parts made of perlitic steel, after welding of 20-40% of the perimeter the initial weld section is re-moved by oxyacetylene, machine or plasma cutting or air-arc gouging. In case of parts made of alloyed steel the metal temperature in the oxyacetylene or plasma cutting or air-arc gouging zone should not be less than 200°С. The cut edges and adjacent weld and base metal surfaces should be cleaned from spits and dross.

For annular welded joints of parts made of austenitic and high-chromium steels the technique and conditions of cutting-out of the initial sec-tion are established in the PED.

6.6. Argon-arc welding. 6.6.1. For argon-arc welding the non-consumable tungsten welding

electrodes made of tungsten grades ЭВЛ, ЭВИ-1, ЭВИ-2, ЭВИ-3, ЭВТ-15, lanthanized tungsten ВЛ or yttrated tungsten СВИ-1 are used as non-consumable welding electrodes.

6.6.2. In case of welding of backing rings (or “whiskers”) of pipes and other cylindrical parts made of austenitic steel, high-chromium steel and iron-nickel steel the argon (shielding gas mixture) shielding should be arranged for on the back side of the joint when the first two layers are fabricated (including in case of combined welding); the shielding is done by gas feed towards the back side of the weld or inside the product being welded. For parts made of perlitic steels the gas feed necessity is determined in the PED.

To reduce the gas flow rate it is recommended to install removable plugs into the items being welded to create a chamber of required volume. The necessary protection of the weld root before the welding is achieved by the gas blowing through the chamber in the amount equal 4 to 5 times cham-ber volume, and during fabrication of the first two weld layers - by gas feed.

7. Overlaying of Corrosion Resistant Coatings

7.1. General requirements. 7.1.1. Overlaying of corrosion resistant coatings should be done in ac-

cordance with the PED developed pursuant the requirements of these BP and drawings.

The PED for overlaying of corrosion resistant coatings should estab-lish:

• steel grades of items (parts) being overlaid;

• characteristics of coatings as regards their types and number of over-laid layers;

• overlaying technique;

• qualification of welders;

• welding (overlaying) equipment in use;

• grades (combinations of grades) of welding (overlaying) materials;

• assortment of filler materials;

• requirements to preparation of base metal surfaces for overlaying;

• type and polarity of welding current;

• overlaying spatial positions and modes; • magnitude and direction of the welding electrode displacement regard-

ing the vertical line to the surface of a product being overlaid (for bod-ies of revolution);

• necessity, techniques and modes of preliminary and concurrent heat-ing;

• sequence of beads and layers fabrication; • grinding of overlaid layer surface and removal or welding of craters

(for welding tape overlaying); • keeping conditions for the overlaid items since overlaying completion

until the heat treatment; • necessity, types and procedures for machining of overlaid coatings; • techniques and scope of overlaid coating inspection; • other necessary data along with all process and control operations.

Exemplary overlaying modes for certain corrosion resistant coatings are given in the Reference Attachment 2.

7.1.2. Corrosion resistant coatings are divided into homogeneous and double ones.

A homogeneous coating is the coating fabricated with welding (over-laying) materials of one grade (one combination of grades of filler materials and fluxing agents or shielding gases) over all thickness irrespectively of number of layers being overlaid.

A double corrosion resistant coating is the coating which first layer is overlaid with welding (overlaying) materials of the same grade (of one combi-nation of grades) and second and subsequent layers are made with the weld-ing (overlaying) materials of another grade (another combination of grades).

N o t e . A layer of the overlaid corrosion resistant coating is a part of the coat-ing formed by a row of beads located at the same level with regard to the base metal.

7.1.3. Homogeneous corrosion resistant coatings are divided into sin-gle-layer and multi-layer ones.

A homogeneous single-layer coating is overlaid in one layer. A homogeneous multi-layer coating is overlaid in not less than two

layers. 7.1.4. Double corrosion resistant coatings are divided into two-layer

and multi-layer ones. A double two-layer coating is overlaid in two layers. A double multi-layer coating is overlaid in more than two layers.

7.1.5. Homogeneous multi-layer coatings made with filler materials, which are not alloyed with niobium, are overlaid only on parts (items), which are not subject to heat treatment.

7.1.6. Thickness of a homogeneous single-layer coating should be

4 12

−+

mm, and of a homogeneous multi-layer coating – not less than 5 mm (after final machining).

N o t e . Thickness of a corrosion resistant coating (or its first layer) should mean a distance from the outer surface of the coating (from the first layer sur-face) up to its fusion zone with the base metal.

7.1.7. Thickness of the first layer of a double coating before the over-

laying of the second layer should be 3 12

−+

mm. The total thickness of a double two-layer coating should not be less than 5 mm, and that of a multi-layer should not be less than 7 mm (after the final machining). At this, the total (cumulative) thickness should exceed the maximum measured thickness of the first layer not less than by 2 mm (after the final machining).

7.1.8. The maximum cumulative thickness of a coating should not ex-ceed values established in the product drawings (provided the drawing con-tain corresponding requirements).

7.1.9. A layer thickness measurement procedure is established in the PED.

7.2. Overlaying process. 7.2.1. All parts (items) prepared for overlaying of a corrosion resistant

coating should be marked and/or supplied with the documentation confirming that they have been accepted by the Technical Control Service. The marking technique is determined by the PED issued by the manufacturing enterprise (assembling organization).

7.2.2. Before overlaying the surfaces ground during the overlaying preparation process are subject to re-grinding and/or degreasing, as required by the PED.

7.2.3. The assembly units with welded joints made by electroslag welding should be subjected to the complete heat treatment before overlay-ing.

7.2.4. The corrosion resistant coatings should be fabricated using automated hidden arc tape overlaying with one or two tape welding electrodes (the recommended basic technique), manual arc coated electrode overlaying or argon-arc overlaying.

Automated hidden arc wire overlaying is permitted in the cases below pursuant the instructions of Table 5:

• for horizontal overlaying of inner surfaces of nozzles where the nozzle axis is vertical and the first (lower) annular bead of each layer is made by arc coated electrode overlaying followed by automated overlaying, the wire electrode angle of inclination is not more than 45o regarding the vertical;

• where the additional filler wire of the same grade that the basic weld-ing wire is introduced into the arc.

7.2.5 Corrosion resistant coatings should be fabricated with the weld-ing (overlaying) materials indicated in Table 5.

7.2.6. While fabricating corrosion resistant coatings the necessity and temperature of preliminary and concurrent heating are set in accordance with the guidance of Subsection 6.2.

7.2.7. Manual arc coated electrode overlaying should be done with beads of the width which is not more than three diameters of the welding elec-trodes in use. It is allowed to increase the width of individual beads up to four diameters of the welding electrode core provided only one bead will be fabri-cated or the number of such beads will not exceed 5% of the total number of beads fabricated on the overlaid product.

7.2.8. In case of automated hidden arc tape overlaying each subse-quent bead of the layer being fabricated should overlap the preceding one not less than 5 mm (in width). In case of manual hidden arc tape overlaying each subsequent bead should overlap the preceding one not less than 1/3 of its width.

7.2.9. During overlaying process, after completion of each subsequent bead its surface and adjacent surfaces of base and/or overlaid metal should be thoroughly cleaned from slag, metal spay and other soiling and visually inspected (by the welder) to find out whether defects are present. In case where defects (cracks, scabbing, undercuts, bulging) are present they should be eliminated before the next bead is made.

In case of overlaying using a welding tape all craters (shrink holes) formed when the overlaying process is interrupted should be also eliminated (grinding using an abrasive tool to provide for a smooth transition to the previ-ously overlaid metal). The overlaid layer surface should be free of falls and shelves between beads more than 2 mm deep (high). Falls and shelves in excess of the above depth (height) should be ground to achieve the indicated value and provide a smooth transition (not more than 1:10 inclination) to the adjacent overlay surface or they should be welded by coated welding elec-trodes or argon-arc overlaying. At this, after the above operations are com-pleted the requirements of paras.7.6.1 and 7.1.7 should be met.

7.2.10. After each layer is completed its surface should be additionally ground (if necessary) and visually inspected over the whole area.

7.2.11. Each subsequent layer should be made only after the above operations are completed (over the whole area) except for large-size items which overlaid surfaces are located in different spatial position.

7.2.12. It is recommended to overlay the first layer without interrup-tions.

The overlaying procedures for the second and subsequent layers should provide for decrease in temperature of the previously made layer down 100oC (by the arc approach) in the area where the next bead is to be fabri-cated.

In case of automated overlaying of the second and subsequent layers with welding tape Св-04Х20Н10Г2Б it is allowed to increase the indicated temperature up to 250°С provided it is monitored periodically at a distance of 150-200 mm from the arc moving forward (ahead of the arc along the axis of bead being overlaid). The monitoring frequency is established by the PED depending on the size of items being overlaid.

7.2.13. If there is an non-permissible roughness (pockets between beads, etc.) the surface of fabricated corrosion resistant coating is machined with an abrasive wheel or by cutting. Depending on the number and locations of the rough areas the surface is machined locally or totally. The coating thickness after machining should satisfy the requirements of paras. 7.1.6 и 7.1.7.

N o t e . It is allowed to eliminate non-permissible falls by welding with the welding materials used for the upper layer of the corresponding coating pro-vided the machining is done within this layer.

7.2.14. In cases specified in the design documentation it is allowed to overlay a corrosion resistant coating on items made of austenitic steels to pro-tect them from corrosion damage. The above coating is fabricated with coated welding electrodes ЭА-855/51 or welding tape Св-0ЗХ15НЗ5Г7М6Б in com-bination with fluxing agent ОФ-10 (for automated hidden arc overlaying) or welding wire Св-0ЗХ15НЗ5Г7М6Б (for argon-arc overlaying). In this regard the number and dimensions of layers are established in the PED.

8. Heat Treatment

8.1. The necessity and type of heat treatment of welded joints and overlaid items are established in accordance with this BP and indicated in drawings.

8.2. Heat treatment of welded joints and overlaid items should be done in accordance with the PED developed pursuant the requirements and guid-ance this BP and drawings.

The PED for heat treatment should indicate:

• name and codes of welded (overlaid) items;

• grades of base materials of welded or overlaid items;

• characteristics of overlays (preliminary on edges, overlaid corrosion resistant coating along with its type, etc.);

• minimum nominal thickness of welded (overlaid) parts (assembly units) which determines the necessity of heat treatment of welded joints or overlaid parts (depending on the base metal grade);

• keeping condition for welded joints and overlaid items from the end of welding (overlaying) till the beginning of heat treatment (whether cool-ing is permitted without a “thermal rest” or after it, permissible cooling temperature and duration, retaining of a given heating temperature, immediate placement into the hot furnace, etc.);

• types of heat treatment along with a description of the sequence of its individual stages (including preliminary, intermediate and final temper-ing);

• heat treatment techniques along with a description of the heat treat-ment equipment to be used;

• heat treatment modes on its each stage (furnace temperature during loading; heating rate; temperature as well as their duration depending

on nominal thickness ranges within the welded joint or overlay zone; conditions, environs or cooling rate, etc.);

• techniques and procedures for monitoring of temperature modes (in-cluding the thermocouple thermometer number, location and fixing methods;

• permissible number and total duration of intermediate and final tem-pering of welded joints and overlaid items (parts);

• other necessary data along with descriptions of all process and control operations.

8.3. Welded joints should be kept in conditions as per Table 13 be-tween the end of welding and the beginning of heat treatment in cases where the “thermal rest” is not required.

8.4. In case of “thermal rest” the welded joints should be cooled down to not less than 5°С. Time is not limited from the “thermal rest” till heat treat-ment.

8.5. Table 14 shows the minimum temperature and duration of the “thermal rest”.

The maximum temperature of the “thermal rest” should not exceed the minimum one more than 100°С.

In case of local “thermal rest” the heating zone width should be the same as the one for the preliminary and concurrent heating pursuant para. 6.2.13.

8.6. For welded joints made of different steel grades the minimum “thermal rest” temperature is assumed with regard to the steel grade for which a higher temperature value is set.

8.7. In cases not covered by Table 13 the keeping conditions within the period of time between the end of welding and the beginning of heat treatment are established in the PED.

8.8. The time interval between the end of the prelimnary edge overlay-ing of parts made of steel grades 12Х2МФА, 15Х2МФА, 15Х2МФА-А, 18Х2МФА and the beginning of the heat treatment should not exceed 20 days, and in other cases it should not exceed the time limits set in the PED.

Before the heat treatment the metal temperature of parts with overlaid edges in all cases should be not less than 5°С.

8.9. The time interval between the end of the overlaying of a corrosion resistant coating on items made of steel grades 12Х2МФА, 15Х2МФА, 15Х2МФА-А, 15ХЗНМФА, 15ХЗНМФА-А, 10XH1M and the beginning of the heat treatment should not exceed 30 days, and in other cases it should not exceed the time limit set in the PED. Within the indicated time interval the metal temperature of parts with overlaid edges in all cases should be not less than 5°С.

8.10. The following heat treatment techniques are applied during manufacturing (assembling) of welded joints:

• tempering;

• complete heat treatment (normalizing or hardening followed by tem-pering);

• austenization.

Table 13 Keeping conditions for welded joints between the end of welding and the be-

ginning of heat treatment

Steel grades of welded parts

Nominal wall thickness of

welded parts, mm

Minimum per-missible tem-perature of metal in the

weld area, °С

Maximum permis-sible time interval,

h

10ГН2МФА, 10ГН2МФЛ, 15ГНМФА

Over 50 70 Not regulated

20ХМ, 20ХМЛ, 20ХМА Independently of thickness

Not regulated 72

10X2M Over 30 100 Not regulated

12Х1МФ, 15Х1МФ Over 6 Not regulated 72

05X12H2M Over 30 80 Not regulated

15Х2НМФА, 15Х2НМФА-А, 15ХЗНМФА,

15ХЗНМФА-А


150 The same

12Х11В2МФ Over 3 Not regulated 72

06Х12НЗД Over 10 100 Not regulated

12А2МФА

15Х2МФА, 15Х2МФА-А


The same

175

200

The same "

18Х2МФА "

300 "

Table 14

“Thermal rest” modes for butt welded joints fabricated by arc or electron- beam welding

“Thermal rest” mode Steel grades of welded parts

Nominal wall thick-ness of welded

parts, mm Minimum tem-perature,

°С

Minimum dura-tion, h

10ГН2МФА, 10ГН2МФЛ

Over 50 up to 110 (inclusive)

150 8

15ГНМФА Over 110 150 18

10X2M, 05XI2H2M Over 30 100 8

12Х1МФ Over 6 130 8

15Х1МФ Over 6 150 10

06Х12НЗД, 15ХЗНМФА,

15ХЗНМФА-А


150 12

08Х13 Over 10 100 8

The welded joints of parts made of perlitic or high-chromium steels

fabricated by arc or electron-beam welding are subjected to tempering. The welded joints of parts made of perlitic or high-chromium steels

fabricated by electroslag welding are subjected to complete heat treatment. The welded joints of parts made of austenitic steel are subjected to

austenization. 8.11. Tempering may be intermediate and final. The intermediate tempering is carried out after fabrication of individual

welded joints (reinforcement overlays) if such joints (overlays) are eventually to be subjected to re-tempering (once or more times).

The final tempering is done after all intended welding (overlaying) and heat treatment operations have been completed for the given welded or over-laid item as well as after the defects in welded joints (overlays) have been eliminated by welding (overlaying).

Besides, the preliminary tempering is carried out after the preliminary overlaying of edges, as well as after complete heat treatment of welded joints made by electroslag welding.

8.12. The nominal temperature of intermediate tempering should be not less than 15°С lower than the nominal temperature of the final tempering.

8.13. In all cases the nominal temperature of final tempering of welded joints and overlaid parts should not exceed the nominal tempering tempera-ture of the base metal when it is subjected to complete heat treatment under modes established by a standard or specification for semi-finished products made of the corresponding steel grade.

8.14. The necessity and temperature of tempering for welded joints of parts made perlitic or high-chromium steels fabricated using arc or electron-beam welding are established in accordance with Table 15 depending on a steel grade and nominal thickness of parts being welded. If Table 15 does not provide for the corresponding guidance the necessity and tempering tempera-ture are set pursuant the PED.

In cases specified in the PED it is permitted to temper welded joints for which Table 15 does not indicate the necessity of tempering due to the nomi-nal thickness of the welded parts.

8.15. It is mandatory to temper he welded joints of parts made of dif-ferent steel grades and/or of different nominal thickness in the following cases:

• if, pursuant the guidance of Table 15, the steel grade and nominal thickness of each of the welded parts condition the necessity to tem-per the welded joint;

• if, pursuant the guidance of Table 15 the steel grade of at least one of the welded parts conditions the necessity to temper the welded joint irrespectively of the nominal thickness of the parts.

In other cases the necessity to temper the indicated welded joints is established in accordance with the PED.

8.16. Tempering temperature for the parts made of different steel grades for which Table 15 provides different tempering temperatures is estab-lished by the PED. At this the nominal tempering temperatures should be within the range of the nominal temperatures, which are determined pursuant Table 15 guidance for tempering of welded joints made of corresponding steel grades and should not satisfy the requirements of Subsections 8.12 и 8.13.

Таблица 15 Tempering temperature of welded joints fabricated using arc or electron-beam

welding

Tempering temperature, °С

intermediate final

Steel grades of parts being

welded

Nominal thick-ness of welded

parts, mm nominal limiting

deviations nominal limiting

deviations

Ст3сп5, 10, 15, 15Л, 20, 20Л


Over 36

-

610

-

± 20

-

630

-

±20

20К, 22К, 25Л


Over 36

-

620

-

±20

-

640

-

+20 -10

06Х12НЗД


Over 10

-

620

-

±10

-

640

-

+10 -15

15ГС, 16ГС, 20ГСЛ, 09Г2С,

10ХСНД, 10XH1М


Over 30

-

630

-

±15

-

650

-

±15

10ГН2МФА. 10ГН2МФАЛ


Over 10

-

620

-

±10

-

650

-

±10

15Х2НМФА, 15Х2НМФА-А, 15ХЗНМФА,

15ХЗНМФА-А


620

±10

650

±10

07Х16Н4Б The same - - 650 ±10 16ГНМА, 15ГНМФА

Up to 25

Over 25

-

640

-

±15

-

660

-

±15

12Х2МФА, 15Х2МФА,

15Х2МФА-А, 18Х2МФА


655

±10

670

±10

05Х12Н2М The same - - 670 ±20 20ХМА, 20ХМ,

20ХМЛ " 670 .115 700 ±15

12MX, I2XM, I5XM


Over 10

-

690

-

±20

-

710

-

±20 10X2M,

12Х2М1Л, 08Х13, 12Х13


Over 6

-

690

-

±20

-

710

-

±20 12ХМФ, 20ХМФЛ Up to 6 (inclu-

sive)

Over 6

-

715

-

±15

-

730

-

±120

15Х1М1Ф, 15Х1М1ФЛ


Over 6

-

725

-

±15

-

740

-

±15 12Х11В2МФ


Over 3

-

730

-

±15

-

750

-

±15

N o t e s : 1. For butt welded joints the nominal thickness of welded parts should mean

their nominal thickness in the zone adjacent to the weld. 2. In case of the local heat treatment (tempering) of welded joints of parts

made of steel grades СтЗсп5, 10, 15, 15Л, 20, 20Л. 20К, 22К. 25Л, 15ГС, 16ГС, 20ГСА, 09Г2С. 10ХСНД, 10XH1M, 10ГН2МФА. 10ГН2МФЛ, 16ГНМА, 15ГНМФА, 12MX, 12Х, 15Х, 20ХМЛ, 12Х1МФ, 20ХМФЛ, 15Х1М1Ф and 15Х1М1ФЛ, upon agreement with the leading material study organization, it is permitted to increase the total limiting deviations by up to 40°С with regard to the nominal tempering temperatures indi-cated in the Table.

3. Upon agreement with the leading material study organization it is permit-ted not to carry out high-temperature tempering of welded joints of steel grades 10ХСНД and 10XH1M having the nominal wall thickness of up to 40 mm inclusive.

4. Where it is provided for by the PED it is allowed to increase the upper limit of the final tempering temperature up to 660°С for welded joints of parts made of steel grades Ст3сп5 and 20.

5. Where it is provided for by the PED it is allowed to carry out the interme-diate tempering of welded joints of parts made of steel grades 12X2MФА and 15Х2МФА at temperature 650±10°С.

8.17. The necessity to temper parts after the preliminary overlaying of

edges is determined using Table 15 the same way as for the welded joints of these parts without overlaid edges. At this, the parts which edges have been overlaid with austenitic filler materials are subjected to the preliminary temper-ing and the parts which edges have been overlaid with high-chromium filler materials are subjected to the intermediate tempering.

8.18. Parts with an overlaid corrosion resistant coating are subjected to tempering in cases specified in the PED. In doing so, the tempering tem-

perature is established as per Table 15 the same way as for the welded joints of parts made of the same steel grade that the overlaid items are.

It is recommended to combine tempering of items with corrosion resis-tant coating and tempering of welded joints.

8.19. The necessity and tempering temperature of welded joints made of two-ply steels where the base layer is welded using perlitic filler materials are determined by Table 15 without considering the plating layer thickness.

8.20. The welded joints of parts made of perlitic or high-chromium steels with parts made of austenitic steel, as well as those made of two-ply steel, fabricated with austenitic filler materials should not be subjected to heat treatment except for the cases specified in the drawings and/or PED.

8.21. For welded joints of parts made of austenitic steel with parts made of perlitic or high-chromium steels (except joints of Iн and IIн Catego-ries), parts made of two-ply steel and parts (items) having overlaid corrosion resistant coating the number of final tempering times should not exceed five.

8.22. The arc or electron-beam welded joints of parts made of austen-itic steel intended for operation at the temperature of up to 360°С (irrespec-tively of thickness of welded parts), and with nominal thickness of the welded parts of up to 10 mm inclusive and also intended for operation at tempera-tures above 360°С should not be subjected to heat treatment except for the cases specified in the drawings and/or PED.

8.23. The arc or electron-beam welded joints of parts made of austen-itic steel with nominal thickness of more than 10 mm intended for operation at temperatures above 450°С (steel grades 08X18H10T, 12X18H9T, 12X18H10T), above 500°С (steel grades 08X18H10, 09Х18Н9, 10X18H9, 12Х18Н9), above 560°С (steel grade 08X16H11M3) are subject to austeniza-tion at temperature 1000±(20÷30)°С except for the cases specified upon agreement with the leading material study organization and indicated in the drawings and PED.

When it is impossible to austenize the above welded joints the follow-ing technology is allowed subject to agreement with the leading material study organization:

• Preliminary overlaying of edges of parts with coated welding elec-trodes A-1 (A-1T) or А-2 (А-2Т) (overlay thickness should meet the requirements of para. 6.3.2);

• Austenization of parts with overlaid edges at 1000 ± (20÷30)°С;

• Machining of overlaid edges;

• Fabrication of a welded joint with welding materials as per Table 7 without subsequent heat treatment. The above technology should be specified in the drawings and incor-

porated into the PED. Necessity, type and modes of heat treatment of welded joints of Iн and

IIн Categories of another steel grades as well as the above steels at lower temperatures are determined as agreed with the interagency leading material study organization and specified in the drawings and PED.

8.24. After electroslag welding, carried out with heating, of parts made of perlitic steel the welded joint should be preliminary tempered without cool-ing down the weld metal and weld region of the base metal below the mini-

mum heating temperature applied during welding (except for cases specified in the PED). At this, the preliminary tempering temperature should not be lower than the final tempering temperature as determined in Table 15 de-pending on a steel grade being welded.

8.25. All electroslag welded joints of parts made of perlitic or high-chromium steels, irrespectively of whether the preliminary tempering was done or not, should be subjected to complete heat treatment under modes established for the base metal.

It is allowed to carry out the complete heat treatment of welded joints made of steel grades 10ГН2МФА and 10ГН2МФАЛ fabricated with coated welding electrodes ЦЛ-59.

8.26. All electroslag welded joints of parts made of austenitic steel should be subjected to austenization under the modes established for the base metal.

8.27. In case of the complete heat treatment of any welded joints, as well as in case of tempering or austenization of longitudinal, meridian, chord and annular welded joints and all overlaid parts, the welded (overlaid) items should be placed in the furnace in one piece.

In case of tempering and austenization of annular welded joints of pipes and other cylindrical parts the local heat treatment is permitted provided it is specified in the drawings and/or PED.

8.28. In case of the local heat treatment of welded joints the total area of the controlled heating of metal consists of the basic and adjacent zones and should include the weld and adjacent sections of base metal at a distance L, which minimum values are given in Table 16 depending on the nominal di-ameters and thickness of the welded parts.

Table 16

Width of the controlled heating zone of the base metal L1, mm

Nominal sizes of welded parts in the weld adjacent sections

Outer diameter, mm Thickness, mm

Minimum dis-tance, mm

Up to 20 (inclusive) 40 Up to 200 (inclusive)

Over 20 50

Up to 25 (inclusive) 60 Over 200 up to 300 (in-clusive) Over 25 70

Up to 30 (inclusive) 90 Over 300 up to 500 (in-clusive) Over 30 120

Up to 50 (inclusive) 180

Over 50 до 100 (inclusive) 250


Over 100 300

N o t e . When the outer diameter of welded parts is more than 1000 mm the value of L1 is established by the PED.

The major controlled heating zone includes the weld and adjacent base metal sections at distances equal to the nominal thickness of the welded parts where the part thickness is up to 50 mm (inclusive), and where the part thickness is greater at the distance of 50 mm. During hold-up period the metal temperature within the major zone should correspond to the preset tempering (austenization) temperature considering the established allowances.

The additional controlled heating zone includes base metal sections of the general area, which are not included into the major zone. During the hold-up period it is permitted to reduce the metal temperature comparing with the preset tempering (austenization) temperature, but not more than by 50°С re-garding the minimum permissible temperature (considering the negative al-lowance), within the additional zone.

8.29. After welding of sheets or other semi-finished products (including those with overlaid corrosion resistant coating) to fabricate shaped parts by deformation techniques (expansion, punching, bending, etc.) the welded joints to be heat treated should be subjected to such operation before the deforma-tion process. For hot deformation it is permitted not to carry out the heat treatment in cases specified in the PED.

8.30. In case of heat treatment of reference welded joints it is permit-ted not to carry out all process heating up to the temperature of 550°С for carbon and manganese-silicon steels and up to the temperature of 450°С for other steel grades (including heating in the course of welding and the “thermal rest”), which are conducted during manufacturing (assembling) of industrial welded items before heat treatment (tempering, hardening, normalizing) as well as all types of tempering (including preliminary tempering) carried out be-

fore normalizing or hardening. Irrespectively of whether the above process heating and tempering, carried out before normalizing or hardening, were done or not the reference specimens’ testing results are true for the similar industrial welded joints as those subject to heating and tempering as those that are not.

8.31. The furnace temperature at the moment of a welded item loading for heat treatment should differ from the temperature of metal of the item sub-ject to heat treatment but not more than 300°С.

9. Elimination of Defects

9.1. All defects (non-permissible deviations from the standards estab-lished by the RFI) revealed in welded joints and overlaid items in the course of non-destructive testing (including defects in the preliminary overlay of edges) are subject to elimination.

9.2. The defective sections should be eliminated in accordance with the PED for elimination of type defects, which was developed pursuant the requirements of this BP and RFI.

9.3. The surface defects should be removed by machining to provide smooth transitions in the locations of falls (using abrasive tools, cutting or punching followed by grinding).

9.4. Elimination of defects without subsequent welding of their fall lo-cations is permitted for:

• welded joints – when in location of the maximum fall the remaining weld and base metal thickness is not less than the design part (as-sembly unit) thickness in the weld zone but not less than 75% of its nominal thickness;

• for overlaid surfaces – when the remaining thickness of the overlay is not less than the minimum permissible pursuant para. 7.1.6 and 7.1.7, and in cases which are not specified in Section 7 it is not less then the minimum permissible one pursuant the drawing. 9.5. The defects with welding of falls in welded joints made by arc and

electron-beam welding and subject to heat treatment should be eliminated after tempering of the welded joint (preliminary, intermediate or final).

It is permitted to eliminate defects before tempering of welded joints if their cooling down to the temperature of 5°С after welding is permitted by Ta-ble 14 and the PED.

9.6. The internal defects (defective regions) should be eliminated by machining (an abrasive tool, by cutting or punching followed by grinding).

It is allowed to eliminate defects by air-arc or plasma-arc gouging fol-lowed by machining of the fall surface:

• until the gouging traces are completely removed – on fall surfaces of welding joints of parts made of carbon or manganese-silicon steels;

• with removal of not less 1 mm layer of metal - on fall surfaces of weld-ing joints of parts made of alloyed steel with the guaranteed yield stress of not more than 315 MPa at 20°С or of austenitic steel;

• with removal of not less 2 mm layer of metal - on fall surfaces of weld-ing joints of parts made of alloyed steel with the guaranteed yield stress of more than 315 MPa at 20°С or of high-chromium steel.

9.7. Shape and sizes of prepared falls should provide for their welding over the whole volume.

The sizes of falls subject to welding are not limited. At this, the falls made in the weld metal (overlaid metal) may intrude into the base metal.

9.8. The falls should be eliminated by one of the welding (overlaying) techniques allowed by para 6.1.2 for fabrication of the welded joints (overlaid layers) to be corrected using the corresponding welding (overlaying) materi-als.

9.9. While eliminating the defects all regulations of this BP, which re-late to fabrication of the welded joints (overlaid items) to be corrected includ-ing preliminary and concurrent (in the course of welding (overlaying) heating and subsequent heat treatment.

In individual cases, upon agreement with the leading material study organization) it is permitted to weld falls without heating or subsequent heat treatment (for welded joints and overlaid items subject to heat treatment).

9.10. The defects in welded joints fabricated by electroslag welding should be eliminated by arc welding only after the complete heat treatment (for welded joints of parts made of perlitic or high-chromium steels) or after austenization (for welded joints of parts made of austenitic steel).

It is permitted to apply the following technology while eliminating de-fects in the welded joints of parts made of alloyed steel subject to shaping:

• normalizing (hardening) and subsequent tempering of an assembly unit with the welded joint made by electroslag welding;

• cutting-out of defects;

• welding of falls with carbon filler materials;

• shaping of the assembly unit along with heating up to the given tem-perature;

• normalization (hardening) and subsequent tempering of the item;

• complete removal of metal overlaid with carbon filler materials;

• welding of falls with corresponding alloyed filler materials;

• tempering of the corrected welded joint.

The set of above operations is considered as one corrective measure. 9.11. Correction of assembly units (items) with defective tubular butt

welded joints is permitted to carry out by cutting-out of the defective welded joint followed by welding of an insert (pipe section). The insert sizes are de-termined by the requirements to the distance between neighboring annular welds as per NFI Rules, Subsection 2.4. In this case both welded joints fabri-cated are considered uncorrected.

9.12. In cases specified in the PED the correction of defective welded joints is permitted by the complete removal of the weld followed by prepara-tion of edges using machining and fabricating the welded joint anew. In this case the new welded joint is considered uncorrected.

9.13. Elimination of defects on one and the same section of a welded joint or overlaid part is permitted only for three times. At this, the corrected section should mean a rectangle of a lest area, which fits the fall subject to welding, and the adjacent surfaces at a distance equal to three-time width of the said rectangle (Fig. 4).

Fig. 4. The determining of sizes of the section to be corrected (aвcd is the rectangle of the least area, which fits the fall; n is the rectangle width; ABCD is the section to be corrected)

The issue concerning the correction of defects on one and the same section of the welded joints (overlaid part) in excess of three times should be resolved subject to an agreement with the leading material study organization and Regional Office of Gosatomenergonadzor of the USSR.

9.14. The following provisions should be followed when the defects are eliminated in the course of fabricating of welded joints (overlaying parts):

• if crack ar detected the welding (overlaying) should be terminated and resumed only after the cracks are eliminated and crack re-currence prevention measures are taken;

• if the backing ring burn-through is detected the tubular welded joints inaccessible for welding on their inner side should be completely re-moved and fabricated anew (provided it is impossible to eliminate the defect without cutting);

• the number of corrections of the weld root on one and the same sec-tion should not exceed three;

• the number of corrections (except for those in the weld root) is not lim-ited and considered in case of fall depth within the nominal thickness of two weld layers;

• the number of corrections on one and the same section of the weld should not exceed three if the fall depths exceeds the nominal thick-ness of two weld layers. 9.15. The number of recorded corrections of defects during welded

joint fabrication and in the completed welded joint is not summed up (ac-counted for separately).

10. Marking of Welded Joints and Overlaid Parts (It ems)

10.1. The welded joints and overlaid parts (items) should bear stamps identifying the name of welder (welders) who did the welding or overlaying. The stamping depth and size are established in the PED basing of the design documentation requirements.

It is allowed to use other marking techniques instead of stamping pro-vided they ensure marking durability during operation and do not reduce qual-ity and reliability of welded (overlaid) items.

10.2. Stamps (marking) should be applied on the outer side of the welded joints at a distance of 30 to 50 mm from the edge of the weld rein-forcement. At this, in case longitudinal and other open welded joints the stamps should be applied at a distance of 100 to 200 mm from the weld end.

10.3. Each welded joint should bear all stamps of welders participated in its fabrication. At this, before the stamp of the welder who preliminary over-laid the edges should be the additional stamp “H” and the additional stamp “K” should be placed before the stamp of the welder who fabricated the weld root (root layer). If the welded joint over its cross-section is fabricated by one welder the above stamps are not applied.

If a welder fabricated only an individual section of the welded joint his/her stamp should be applied in the middle of the section he/she did con-sidering the guidance of Subsection 10.2.

10.4. If all welded joints of the item have been made by one welder it is permitted not to stamp (mark) each welded joint. In this case the welder’s stamp is applied near the manufacturer’s label or on another free area of the item (or welded unit) and the stamp location is embodied into a visible frame, which is made with unwashable paint (the latter does not cover the surfaces of items to be in contact with the coolant).

10.5. In case of parts (items) with an overlaid corrosion resistant coat-ing the welders’ stamps (marks) should be applied on a free section of the item on the part opposite to the overlaid one.

10.6. In case the stamps (marks) are to be eventually removed by ma-chining they should be restored in the same locations.

10.7. In individual cases, as specified in the design documentation, where the stamping (marking) can degrade quality and reliability of the welded items, as well as where it is impossible to preserve stamps (marks) during operation, the equipment or pipeline certificate should be supple-mented with rough drawings (schematic views) of the item to indicate the lo-cations of unmarked welded joints and stamps of welders who did the welding (overlaying).

11. Safety Requirements

11.1. The sanitary and hygienic conditions at the welding and overlay-ing stations, as regards to the industrial premises, equipment, processes, tooling, district heating, ventilation and lighting, should satisfy the Sanitary Rules for Welding, Overlaying and Cutting of Metal approved by the Ministry of Public Health of the USSR.

11.2. While conducting welding operations it is required to follow the Unified Fire Safety Rules for Industrial Enterprises approved by the Ministry of Inferior of the USSR and the Rules for Technical Operation of Consumers’ Power Installations and Safety Rules for Operation of Consumers’ Power In-stallations approved by the Ministry for Energy of the USSR.

11.3. While conducting the heating and heat treatment the require-ments of rules indicated in Subsection 11.2 should be followed along with the Rules for Safety-at-Work and Industrial Hygiene for Heat Treatment of Metal approved by the Central Committee of Trade Unions of the Machine Building Workers.

11.4. While conducting operations related to welding and overlaying of the equipment and pipelines the requirements of the Hygienic Standards and Rules for Limitation of Vibration at Work Places and Hygienic Standards for Sound Levels at Work Places, approved by the Ministry of Public Health of the USSR, should be met.

11.5. Vibration parameters at the work places should be within the lim-its established by the Hygienic Standards and Rules for Operations with Tools, Mechanisms and Equipment Producing Vibration Transmitted Hands of Workers approved by the Ministry of Public Health of the USSR.

11.6. Welding operations where degreasing liquids are used should be conducted upon a special permit issued by a representative of the fire safety unit and a person responsible for welding operations at a given working bay.

11.7. In case of welding of parts with preliminary and concurrent heat-ing the following safety precaution measures should be taken: the heated parts should be covered by a heat isolating material, the welded sections be-ing left open only.

11.8. The administration of enterprise conducting welding operations should arrange for development of the corresponding safety procedures and for control over how they are followed.

The procedures should be located at the relevant work places. 11.9. The administration of enterprise conducting welding (overlaying)

operations should arrange for a periodic briefings and testing of safety-at-work knowledge of workers an engineering and technical personnel at least once in the quarter of a year.

An unscheduled briefing is conducted if a worker has violated safety-at-work requirements.

11.10. The work permit for newly employed or transferred to another job welders (operators) is issued only after they are briefed and their knowl-edge in work safety is tested, the results being recorded in a special log.

12. Requirements to Structural Shapes of Welded Joi nts

12.1. The major recommended types of welded joints with the indica-tion of the welding techniques applied, nominal thickness of parts being welded and the structural elements of prepared edges and fabricated welds are given in the recommended Attachment 3.

Upon agreement with the leading material study organization it is per-mitted to apply the welded joints not specified in Attachment 3 provided they meet the RFI requirements.

12.2. The major recommended types of welded joints of parts made of perlitic and high chromium steels are given in Tables ПЗ.1 - ПЗ.19, П3.21-ПЗ-24, ПЗ.ЗО-ПЗ.32, П3.34, ПЗ.36, ПЗ.38-ПЗ.41, ПЗ.51-П3.54 – for butt recti-linear and annular welded joints with inner diameter of joined parts over 750 mm; in Tables ПЗ.17, П3.20-П3.23, П3.25-П3.28, П3.30, П3.32, ПЗ.34, ПЗ.36, П3.38-П3.40, П3.42-П3.46, ПЗ.48, П3.49 – for butt welded joints with inner diameter of joined parts of up to 750 mm; in Tables П3.55-П3.65 – for angle, tee-joint and edge welding joints.

12.3. The major recommended types of welded joints of parts made of austenitic and iron-nickel steels are given in:

Tables П3.1-П3.7, ПЗ.11-ПЗ.19, ПЗ.22, ПЗ.29-П13.33, ПЗ.З5, ПЗ.37, ПЗ.47, ПЗ.48 - for butt rectilinear and annular welded joints with inner diame-ter of joined parts over 750 mm; in Tables П3.20-П3.22, П3.25-П3.28, ПЗ.30, ПЗ.32, ПЗ.33, ПЗ.З5, ПЗ.37, П3.42-П3.44, ПЗ.46, ПЗ.49, ПЗ.5О - for butt welded joints with inner diameter of joined parts of up to 750 mm; in Tables П3.55-П3.65 - for angle, tee-joint and edge welding joints.

12.4. Welded joints of parts made of steels belonging with different structural classes and of two-ply steel should correspond, in terms of geome-try, to the welded joints of steels belonging with the same structural classes provided the requirements for preliminary overlaying of edges, grooving, clad-ding and separating and protective overlays, as specified in Subsections 6.3 and 6.4 are met.

Structural elements of welding-prepared edges of parts made of dif-ferent structural steels and/or two-ply steel after preliminary edge overlaying as per the requirements of Subsections 6.3 and 6.4 and machining should correspond to the requirements established for the accepted type of the welded joint without overlaying of edges, the cladding removal requirements of para. 6.4.1 being met.

Structural elements of fabricated welded joints of parts made of differ-ent structural steel classes and/or two-ply steel should correspond to the re-quirements established for the accepted type of the welded joint of parts made of a homogeneous metal, the requirements of Subsections 6.3 and 6.4 being met.

12.5. In case of welding of parts which nominal thickness differs from the values given in Attachment 3 the sizes of structural elements of prepared edges and fabricated welds are taken in accordance with the ones estab-lished for parts having the most close thickness value.

12.6. While fabricating welded joints of types 1-21 and 1-25 (as modi-fied) it is permitted to use argon-arc non-consumable electrode welding as with a filler material as without it.

12.7. The sizes of structural elements established for angle welded joints of types 2-03 and 2-04 relate only to the cross-section given in the drawing. The sizes of structural elements of other cross-sections are estab-lished in the drawings.

12.8. The welded joint of type 1-01 is permitted with the melt backing. In this case, when the nominal thickness of the parts being welded is up to 10 mm inclusive, it is permitted to weld on one side with one pass.

12.9. Roughness of the edges prepared for welding should not be

more than R z 80

.

12.10. The shape and sizes of the remaining cylindrical backing rings and melted inserts, as well as the permissible values of gaps between a ring and welded parts, should correspond to those shown in Fig. 5. It is permitted to round the ring inner edges within radius of up to 3 mm instead of removing bevels on them.

Fig. 5. The remaining cylindrical backing rings (а) and melted inserts (б). Dк = Dp (with regard to nominal size). For diameter Dк only negative limiting devia-tion is established (in drawings and/or PED). The limiting deviations of sizes Dк AND Dp should ensure the permissible gap value S . Diameter Dвc is es-tablished in drawings and/or the PED depending on the boring diameter Dp and the welded joint type.

S, mm Sк , mm В, mm в, mm, not more than

Nominal value Limiting devia-tion

Up to 75 (inclusive) Over 75 up to 150 (inclu-sive) Over 150 up to 300 Over 300

2.0 2.5

3.0 4.0

±0.2

16-20 20-24

20-24 24-30

0.2 0.3

0.4 0.5

It is permitted to use melted inserts of other shape pursuant the guid-

ance in drawings and or PED. 12.11. To ensure the minimum displacement of edges on the inner

side of the joint it is recommended to do the cylindrical sizing (boring, expan-sion) of the pipe ends as it is shown in Fig. 6.

In cases specified in the design documentation, to fabricate welded joints of pipes made of austenitic steel it is permitted to do a conical expan-sion (boring) of the pipe ends as per Fig. 7 using conical backing rings as it is shown in Fig. 8 provided the above structural features are considered in strength calculations.

Fig. 6. The cylindrical boring (а) and sizing (expansion) (б) of pipe (nozzle) ends for butt one-sided welded joints. Diameters Dр are established by draw-ings and/or PED. At this for Dр only the positive limiting deviation is estab-lished. The length L of the cylindrical part of boring and sizing (expansion) of pipe (nozzle) ends for welded joints which are not subject to ultrasonic testing is as follows:

S, mm L, mm, not less than

From 1 up to 4 (inclusive) 10

Over 4 up to 8 (inclusive) 15






Over 80 50

When the pipes (nozzles) are prepared for the welding joints subject to ultrasonic testing, the length L is established in the drawings and/or PED in accordance with the guidance of the regulatory and technical documentation for ultrasonic testing.

Fig. 7. Conical boring for joints on a conical backing ring for S over 5 mm (а) and sizing (expansion) of pipe (nozzle) ends for S up to 5 mm (inclusive) (б)

Fig. 8. A conical backing ring (Dр is the diameter of boring, expansion or siz-ing to fit the ring; Dк is the backing ring outer diameter)

D, mm Sк, mm


2.0±0.2 2.5±0.2 3.0±0.2

12.12. In cases specified in the design documentation it is permitted

not fabricate or remove the weld reinforcement.

13. Deviations from Established Requirements

Where it is technically or economically unreasonable to follow individ-ual requirements of this document it is permitted to deviate from them pro-vided there are justifications formalized in joint technical solutions made by the design organization and manufacturing enterprise (assembling organiza-tion) as agreed upon with the leading material study organization and Gosa-tomenergonadzor of the USSR.

ATTACHMENT 1 (reference)

REFERENCE BOOK

of regulatory and technical documentation for welding materials permitted for

manufacturing, assembling and repair of equipment and piping of nuclear power installations

Welding materials

Name Grade

Code of document

Св-08А, Св-08АА, Св-08ГА, СВ-10ГА, Св-10Г2, Св-08ГС, Св-12ГС, Св-08Г2С, Св-08ГСМТ, Св-10НМА. Св-08ХМ, Св-08ХМФА Св-10ХМФТ, Св-08ХГСМА, Св-08ХГСМФА, Св-04Х2МА, Св-13Х2МФТ, Св-10Х11НВМФ, Св-06Х14, Св-06Х19Н9Т, Св-08Х19Н10Г2Б, Св-08Х19Н10МЗБ, Св-04Х19Н11МЗ, Св-07Х25Н13, Св-10Х16Н25АМ6, Св-З0Х15Н35В3Б3Т

ГОСТ 2246-70

Св-06А ТУ 14-1-1569-75 Св-10ГНМА, СВ-10ГН1МА, Св-10ГН2МФА

ТУ 14-1-2860-79

Св-10ХМФТУ ТУ 14-1-3034-80 СВ-12Х2Н2МА, Св-12Х2Н2МАА ТУ-14-1-2502-78 Св-09ХГНМТА, Св-09ХГНМТАА-ВИ ТУ-14-1-3675-83 Св-16Х2НМФТА ТУ 14-1-3633-83 Св-01Х12Н2-ВИ ТУ 14-1-1212-74 Св-01Х12Н2МТ-ВИ ТУ 14-1-3595-83 Св-09Х16Н4Б ТУ 14-1-1692-76 Св-0ЗХ16Н9М2 ТУ 14-1-2208-77 Св-021Х17Н10М2-ВИ ТУ 14-1-1005-74 Св-04Х17Н10М2 ТУ 14-1-1959-74 СВ-04Х20Н10Г2Б ТУ 14-1-3252-81 Св-0ЗХ24Н13Г2Б ТУ 14-1-2205-77 Св-0ЗХ15Н35Г7М6Б ТУ 14-1-2143-77 Св-08АА-ВИ ТУ 14-1-4355-87 Св-0ЗХ20Н45Г6М6Б-ВИ ТУ 14-1-2206-77 Св-06ХГСМТА, Св-14Х12НВМФ ТУ 14-1-2808-79

Welding wire

Св-13Х2МФТА ТУ 14-1-4370-87 Welding tape Св-08Х19Н10Г2Б, Cв-04X19H11M3, Cв-

07X25H13, Св-10Х16Н25АМ6 ТУ 14-1-3146-81

Св-04Х20Н10Г2Б ТУ 14-1-2270-77 Нп-0ЗХ22Н11Г2Б ТУ 14-1-2750-79 Св-0ЗХ24Н13Г2Б ТУ 14-112207-77 Св-0ЗХ15НЗ5Г7М6Б ТУ 14-1-2162-77 ЦУ-5, ЦУ-6, ЦУ-7, ЦУ-7А, ЦУ-2ХM, ЦЛ-20, ЦЛ-21, ЦЛ-25/1, ЦЛ-25/2, ЦЛ-32, ЦЛ-38, ЦЛ-39, ЦЛ-45, ЦЛ-48, ЦЛ-51, ЦЛ-59, ПТ-30, РТ-45А, РТ-45АА, ЦТ-10, ЦТ-15К, ЦТ-26, ЦТ-26М, ЦТ-45, ЦТ-48

ОСТ 108.948.01-86

ЦЛ-52 Certificate № 223-73

ЗИО-8 *

ОЗС-4 Certificate № ОC31-10-76(A)

ОЗС-6 Certificate № OC31-11-76(A)

УОНИИ-13/45, УОНИИ-13/45А, УОНИИ-13/55, УОНИИ-13/45АА, УОНИИ-13/55АА, УОНИИ-13/10Х13, Н-3, Н-6, H-10, Н-20, Н-23, Н-25, РТ-45Б, ЭА-395/9, ЭА-400/10У, ЭA-400/10T, ЭА-582/23, ЭА-855/51, ЭА-898/21Б, ЭА-902/14, ЭМ-959/52, A-1, A-1T, A-2, A-2Т, КТЧ-7, АНО-4, МР-3

*

Coated welding electrodes

ТМУ-21, ТМЛ-1У, ТМЛ-3У ГОСТ 9466-75 ГОСТ 9467-75

ОСЦ-45, АН-348А, АН-348АМ, АН-8, АН-22, АН-17M, АН-26, AH-26C

ГОСТ 9087-81

КФ-27 ТУ 5.966-11087-78 КФ-30 ТУ 5.965-11090-78

Welding fluxing agents

АН-42, АН-42М, ОФ-6, ОФ-10, НФ-18М, KФ-16 КФ-19, КФ-28, ФЦ-11, ФЦl-16, ФЦ-16A, ФЦ-17, ФЦ-18, ФЦ-19, ФЦ-21, ФЦ-22

*

Lanthanized tung-sten bars

ВЛ ТУ 48-19-27-77

Yttrated tungsten bars

СВИ-1 ТУ 48-19-221-76

Tungsten bars ЭВЛ, ЭВИ-1, ЭВИ-2, ЭВИ-3, ЭВТ-15 ГОСТ 23949-80

Gaseous and liquid argon

Highest and first grade ГОСТ 10157-79

Helium - ТУ 51-940-75 Gaseous oxygen for process applica-tions

First and second grade ГОСТ 5583-78

Gaseous and liquid carbon dioxide

Highest and first grade ГОСТ 8050-85

N o t e s : 1. The documents marked with a asterisk are listed in the additional Refer-

ence Book of Gosatomenergonadzor of the USSR. 2. It is permitted to use the welding materials in accordance with other (not

indicated in this Attachment) regulatory and technical documentation pro-vided its requirements as stringent as those of the documentation indicated herein.

3. As new regulatory and technical documents to substitute those indicated

herein come into force, the welding materials should be used as per new regulations, specifications and certificates. In doing so, it is permitted for two years after the replacement of a regulatory and technical document to use the corresponding welding materials in accordance with new regula-tions, which were supplied under the document (previously effective) indi-cated in this Attachment.

ATTACHMENT 2 (reference)

EXEMPLARY WELDING AND OVERLAYING MODES

Table П2.1. Automated hidden arc welding

Welding mode parameters Steel grade Type of welded joint

Nominal part thickness in weld region,

mm

Welding wire diame-

ter, mm

Name and numbers of beads Amperage, А Arc voltage, V Welding

speed, mm/sec

Root beads on the side of welding beginning

1 2 3

450-500 480-530 550-600

34-40 34-40 34-40

10-12 8-10

the same Back side root beads

1 2 3

650-700

34-40

5-7

1-06 1-07 1-08

Over 50 5

Grooving filling beads 550-700 34-40 5-10

Perlitic

1-12 1-13

Over 30 5 Grooving filling beads 550-700 34-40 5-8

Root beads on the side of welding beginning

1,2 3

500-550 600-650

34-40 34-40

10-11 8-9

Back side backing bead

950-900

42-45

5-7

1-05


5

Grooving filling beads 550-700 34-40 5-8

1-09 1-10

Over 30 5 Grooving filling beads 550-700 34-40 5-8

1-04


4 5

Any type "

400-500 500-550

28-30 32-34

3-5 6-8

Austenitic

1-01 Up to 10 (inclusive) Over 10

4 4

" 1 2

400-500

600-650 700-800

28-30

32-36 32-36

3-5

6-7 8-9

Table П2.2. Automated argon-arc welding

Welding mode parameters

Argon flow rate, l/min

Steel grade

Type of welded joint

Nominal part

thickness in weld-ing re-

gion, mm

Tungsten welding elec-trode diame-

ter, mm

Bead number

Welding speed,

mm/sec

Filler wire di-ameter,

mm

Welding wire ad-

vancement speed,

mm/sec

Welding wire to part distance (pre-

set), mm Amper-

age, А

Arc voltage, V

For burner For feed

1 2-4 - - 1-1.5 110-120 10-12 8-10 1-6 3.0 Over 1.6 up to 4 (inclu-sive) 2-3 2-4 1.6 6-7.5 2-3 110-120 10-12 8-10 1-6

1 2-4 - - 1.15 120-130 10-12 8-10 1-6

Austen-itic

1-23

3.5 Over 1.6 up to 4 (inclu-sive)

2-3 2-4 1.6 6-7.5 2-3 120-130 12-14 8-10 1-6

Table П2.3. Manual argon-arc non-consumable electrode welding

Amperage, A Argon flow rate, l/min

Steel grade

Type of welded joint

Nominal thickness of parts in welding region, mm

Tungsten welding electrode diameter,

mm

Filler wire di-ameter, mm

Root bead Groove filling To burner For feed

1-23 Over 3 up to 4 (inclusive) Over 4 up to 6 (inclusive)

1.6-4.0

1.6-4.0

1.6-2.0

1.6-3.0

45-90 50-70

90-100

8-10

8-10

4-5

4-5

Austenitic and perlitic

2-03

2-04

Over 4 up to 6 (inclusive) Over 6

1.6-4.0

1.6-4.0

- -

70-100

80-110

100-140

120-160

8-10

8-10

4-5

4-5 1-23 Over 3 up to 4

(inclusive) Over 4 up to 6 (inclusive)

1.6-4.0

1.6-4.0

1.6-2.0

1.6-2.0

40-70

65-80

40-70

65-80

8-10

8-10

4-5

4-5

Iron-nickel alloys

2-03

2-04

Over 4 up to 6 (inclusive) Over 6

1.6-4.0

1.6-4.0

1.6-2.0

1.6-2.0

55-80

60-90

55-80

60-90

8-10

8-10

4-5

4-5

Table П2.4. Manual argon-arc non-consumable electrode pulse welding of piping made of austenitic steel

Welding current, A Argon flow rate, l/min Nominal thickness of parts in welding re-

gion, mm

Bead number Tungsten welding electrode diameter,

mm


Pulse dura-tion, sec

Pause dura-tion, sec

pulse pause To burner For feed 1.0-1.5 1

2 2,0 2.0

- 1.2

0.1-0.15 -

0.15-0.25 -

40-50 40-50

6-8 -

6-8 6-8

2-5 2-5

2.0-2.5 1 2

2.0 2.0

- 1.6

0.4-0.6 -

0.3-0.5 -

50-70 50-70

6-8 -

6-8 6-8

2-5 2-5

Over 2.0 up to 4.0 (inclusive)

1 2 and subse-

quent

2.0-3.0 2.0-3.0

- 2.0-2.5

1.5-2.0 -

0.3-0.5 -

105-125 105-125

6-8 -

7-10 7-10

2-5 2-5


1 2and subse-

quent

3.0 3.0

- 2.5-3.0

1.5-2.5 -

0.3-0.5 -

140-180 140-180

6-8 -

10-12 10-12

2-5 2-5


1 2 and subse-

quent

3.0-4.0 3.0-4.0

- 3.0-4.0

2.5-3.0 -

0.3-0.5 -

150-200 150-200

6-8 -

12-15 12-15

2-5 2-5

N o t e . The second and subsequent passes are made by non-pulse welding.

Table П2.5. Semi-automated gas shielded (argon and carbon acid gas) consumable electrode welding of tubular parts made of austenitic steel;

i-shaped grooving

Gas flow rate to burner, l/min

Welding wire diame-

ter, mm

Arc volt-age, V

Amperage, A

Pass number

argon carbon acid gas

1.0; 1.2; 1.6 15-17 120-160 Second and sub-sequent

12-14 2-4

N o t e . The first pass should be made by argon-arc non-consumable elec-trode welding using the modes given in Table П2.4.

Table П2.6. Electroslag welding

Steel grade of welded parts

Perlitic Austenitic

Characteristics

Unit of measure

Electrode wire Consumable nozzle

Electrode wire Consumable nozzle

Nominal thickness of parts in welding region

mm

30-500 Over 100 30-500 Over 100

Gap between edges of welded parts

mm

As per Attach-ment 3

35±5

As per Attach-ment 3

35±5

Electrode wire di-ameter

mm 3-5 3-5 3-5 3-5

Number of elec-trode wires (noz-zles)

1-3 1 for 50-70 mm of thick-

ness

1-3 1 for 50-70 mm of thickness

Welding electrode transverse vibration peed

Mm/sec 9-10 - 9-10 -

Welding electrode extreme position hold-up time

sec 4-5 -

4-5 -

Dry stick-out dis-tance

mm 50-70 - 40-50 -

Consumable elec-trode plate thick-ness

mm - 8-15 - 8-15

Amperage for one electrode wire

A Up to 700 Up to 700 Up to 450 Up to 400

Slag bath voltage V 42-46 36-42 34-36 30-32

Welding speed for metal of thickness S, not more than

mm/sec 98/(300+S) 98/(300+S) 98/(300+S) 98/(300+S)

Slag bath depth mm 50-70 40-60 40-50 30-40

Cooling water tem-perature, not more than

°С 60 60 60 60

Table П2.7. Automated hidden arc narrow grooving welding of perlitic

steel (welded joint types 1-33, 1-34, 1-35, 1-36)

Welding wire di-ameter, mm

Amperage, A Arc voltage, V Welding speed, m/h

3

4

400-500

450-550

32-36

34-38

22-28

22-28

N o t e . It is preferable to use the electrode wire of 3 mm in diameter.

Table П2.8. Automated argon-arc non-consumable electrode pulse welding for making the root bead of unturning butt welded joints of types 1-21, 1-25-1, 1-25-6 on pipes made of austenitic steel using welding machines ОДА, ГСМ and AT

Nominal diame-ter of welded

pipes, mm

Nominal pipe wall thickness

or dulling thick-ness, mm

Arc burning time before welding

electrode moves, sec

Distance between welding electrode and item (pre-set),

mm

Pulse am-perage, A

Pause amper-age, A

Pulse dura-tion, sec

Pause dura-tion, sec

Welding elec-trode step

length, mm

Welding speed,

mm/sec

1 0.5 80-85 0.10-0.15 0.15-0.25 4.4-5.0

1.5 1.5 90-95 0.10-0.15 0.15-0.25 3.1-3.3

14-38 2 1.8 0.8-1.2 105-110 6-8 0.20-0.25 0.25-0.30 2.8-3.3

2.5 2.0 120-125 0.50-0.60 0.40-0.50 2.2-2.5

3 2.5 140-145 0.60-0.70 0.70-0.80 1.9-2.2

3.5 3.0 155-165 0.75-0.90 0.70-0.80

Welding elec-trode movement is uninterrupted

1.4-1.9

3 3.0-4.0 100-120 0.60-0.65 0.50-0.60

57-159 3.5 3.0 1.0-1.5 120-130 25 0.60-0.65 0.50-0.60 2-2.4

4 3.0 140-155 0.75-0.90 0.55-0.65

4.5 4.0 150-165 0.75-0.90 0.55-0.65

Step-by-step elec-trode movement

Table П2.9. Automated argon-arc non-consumable electrode welding of unturning butt welded joints of types 1-25-1 on pipes made of austenitic steel using welding machines АДГ-201УХЛ4 and "Комета"

Nominal di-ameter of welded

pipes, mm

Nominal pipe wall thickness,

mm

Bead number


mm


Amperage, A

Arc voltage, V

Welding speed,

mm/sec

Wire feeding speed, mm/sec

Welding elec-trode vibration

frequency, 1/min

1 1-1.2 - 100-115 9-11 1.7-2.1 - - 57-76

4-4.5 2 1.8-2.5 1.2 110-120 11-13 1.9-2.2 5.0-6.1 60-70

1 1-1.5 - 110-120 9-11 1.8-2.1 - - 5-6 2-3 1.8-2.5 1.2-1.6 120-130 11-13 1.7-1.9 4.2-5.6 60-70

1 1-1.5 - 115-125 9-11 1.8-2.1 - -

57-108

7-9 2-4 2-3 1.6 130-145 11-14 1.7-1.9 5.0-6.1 50-60

1 1-1.5 - 115-125 9-11 1.5-1.8 - - 6-7 2-4 1.8-2.5 1.2-1.6 125-140 11-13 1.5-1.9 4.2-4.7 60-70

1 1-1.5 - 120-130 9-11 1.7-1.9 - - 8-10 2-6 1.8-3.0 1.6 145-160 11-14 1.7-1.9 4.4-5.6 50-60

1 1-1.5 - 140-160 9-11 1.7-1.9 - -

133-159

14-17 2-9 2-3 1.6 170-186 11-14 1.9-2.2 5.6-6.9 40-50

Table П2.10. Automated argon-arc non-consumable electrode welding using the automatic pressure technique to fabricate unturning butt welded joints of type 1-21 on pipes made of austenitic steel without filler wire (except for root

bead made in accordance with the modes given in Table 9)


pipes, mm


mm


mm

Amper-age, A

Arc voltage, V Welding speed,

mm/sec

Number of arc passes

14-25 2 2.5 3

1.2-2

60-70 60-70 70-80

10-12 2.5-2.8 2.5-2.8 2.5-2.8

3-6

32-38 2.5 3

3.5 3

1.5-2.5

60-75 75-90 85-100 75-90

9.5-11 2.5-2.8 2.8-3.1 2.8-3.1

3-6

57-108 3.5 4

4.5

1.5-2.5

80-95 80-95 80-100

9-10.5 2.8-3.1 2-6

Table П2.11. Automated argon-arc non-consumable electrode welding using the subsequent melting technique to fabricate unturning butt welded joints of types 1-21 on pipes made of austenitic steel without filler wire using welding

machines ОДА, AT, ГСМ


pipes, mm


mm

Distance between electrode and item (pre-set),

mm

Amper-age, A

Arc volt-age, V

Welding speed,

mm/sec

Number of unin-terrupted arc

passes

14 2 85-95 15.3-17.0 3 18 2.5 90-105 13.9-15.3 4 25 2 90-100 12.5-13.9 3 32 3 105-115 8-10 6.9-8.3 3 32 3.5 0.8-1.2 105-115 5.6-6.9 3 38 3 115-120 6.9-8.3 3 38 3.5 110-120 5.6-6.9 4

Table П2.12. Automated argon-arc non-consumable electrode welding to fabricate unturning butt welded joints of types 1-25-1, 1-25-6 on pipes made of austenitic steel with nominal diameter of 219 up to 560 mm and wall thickness

of 10 up to 40 mm using welding machines АДГ-301УХЛ4

Amperage, A Weld bead (layer) number

Filler wire diame-ter, mm base in pulse at

edge


mm/sec

Wire feeding speed, mm/sec

Electrode vibra-tion speed,

mm/sec

Electrode lag time at edge, sec

1 - 145-160 145-160 8-9 1.7-1.8 - - -

2 1.2 125-145 150-160 9-10 0.8-1.0 3.6-4.2 2.5-3 1-1.4

3 1.6-2.0 155-170 180-190 9-10 0.8-0.9 5.6-6.9 2.5-2.8 0.8-1.1

4 and subsequent (except for two last

layers)

1.6-2.0 170-220 200-240 9.5-11 0.7-0.8 6.1-8.9 2.5-2.8 0.8-1.1

Last but one layer 1.6-2.0 160-200 190-220 9-10 0.6-0.7 4.2-6.9 2.5-2.8 0.7-1

Last layer 1.6-2.0 160-200 160-200 9-10 0.6-0.7 3.3-4.7 3.0-3.5 0.2-0.5

Table П2.13 Automated argon-arc non-consumable electrode welding to fabricate unturning butt welded joints of types 1-25-2 on pipes made of perlitic steel with nominal outer diameter of 219 up to 990 mm and wall thickness of 10

up to 65 mm using welding machine АДГ-301УХЛ4

Amperage, A Weld bead (layer) number

Filler wire diame-ter, mm

base in pulse at edge


mm/sec

Wire feeding speed,

mm/sec

Electrode vibra-tion speed,

mm/sec

Electrode lag time at edge,

sec

1 - 150-160 150-160 9-10 0.7-0.8 - - -

2 1.2 I80-I90 200-210 9-10 0.7-0.8 5.0-6.9 2.5 0.7-0.9

3 1.6-2.0 200-220 220-240 10-11 0.6-0.7 4.2-5.6 2.5 0.9-1.1

4 and subsequent (except for two last

layers)

1.6-2.0 210-230 240-260 10-11 0.6-0.7 5.0-8.3 2.5 0.9-1.1

Last but one layer 1.6-2.0 200-210 220-240 10-11 0.6-0.7 5.0-6.4 3.0 0.8-1.0

Last layer 1.6-2.0 190-210 I90-210 9-10.5 0.6-0.7 4.2-5.6 3.0 0.7-0.9

Table П2.14. Tape electrode overlaying of corrosion resistant coating

Overlaying mode parameters

Arc voltage, V

Tape grade

Tape section, mm Amperage, A Flux.agent ОФ-10 Flux.agent ФЦ-18

Overlaying speed, mm/sec

Cв-07X25HI3 0.7х50

0.5х50

2(0.7х50)*

2(0.5х50)*

600-650

550-600

1100-1200

900-1000

32-36

32-36

38-40

38-40

32-36

32-36

32-36

32-36

2.2-2.8

2.0-2.5

5.0-6.0

4.2-4.5

Св-04Х20Н10Г2Б

(Св-08Х19Н10Г2Б)

0.7х50

0.5х50

2(0.7х50)*

650-700

600-650

1100-1200

32-36

32-36

38-40

32-36

32-36

32-36

2.2-2.8

2.0-2.5

5.0-6.0

Нп-0ЗХ22Н11Г2Б 2(0.7х50)* 2(0.5х50)*

1150-1250

950-1050

38-40

38-40

32-36

32-36

4.2-5.0

3.6-4.2

Св-0ЗХ15Н35Г7М6Б 0.7х50 650-750 32-36 - 4.2-5.5

* Overlaying using two tape welding electrodes set 10-14 mm apart from each other.

Attachment 3 (recommended)

MAIN TYPES OF WELDED JOINTS

The following legend is used in the text of Attachment 3.

For types of welded joints: 1 - butt, 2 - angle, 3 – tee-joint, 4 - edge.

For welding techniques: 10 – automated hidden arc welding;

11 – automated hidden arc welding with preliminary root pass by manual arc coated electrode welding; 12 – automated hidden arc welding on steel backing; 20 – electroslag welding; 30 – manual arc coated electrode welding; 31 – manual arc coated electrode welding with root pass; 32 – manual arc coated electrode welding on steel backing; 40 – combined welding (weld root is made by argon-arc welding); 42 – combined welding on steel backing (weld root is made by argon-arc welding); 51 – argon-arc non-consumable electrode welding without filler metal; 52 – argon-arc non-consumable electrode welding with filler metal; 53 – argon-arc consumable electrode welding.

Tables П3.1-ПЗ.65 give two legends for a welded joint: the main one and bracketed one. The main legend should be used in the design documentation in-tended for application in the COMECON countries (including the USSR). It is per-mitted to use the bracketed legend only in the design documentation intended for application in the USSR.

Table ПЗ.1

Structural elements в, mm е =е1, mm g =g1, mm Welded joint legend

of prepared edges of the

welded parts of weld

Welding tech-nique

S =S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

3 4

8 10

53

5

0 ±0.5 ±0.8

12

±3.

1.5

±1.5

6 7 8 9

16

10 12 14

20

±4

1-01 (C-1)

10

16

0

±1.0

22 ±5

2.0

±1.5

Table ПЗ.2

Structural elements е =е1, mm g =g1, mm Welded joint legend



Welding tech-nique

S =S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting deviation

3 6

4 7

1.0

5 8

6

1-01-1 (C-1-1)

51

52

40 8 10

±1

1.5

±0.5

Table ПЗ.3

Structural elements е, mm g, mm Welded joint legend

of prepared edges of the welded parts

of weld

Welding tech-nique

S =S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting deviation

3 10 1.5

4

5

14

16

±2

1-01-2

(C-1-2)

10

6

8

18

20 ±3

2.0

±1

Table ПЗ.4

Structural elements e, mm g, mm Welded joint legend

of prepared edges of the welded

parts of weld

Welding tech-nique

S=S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting deviation

14 15

16 17

18 20

±4

2.0

±1.5

20 22

22 25

25 29

±5

2.5

+2.0 -1.5

28 32

1-02 (C-2)

10

30 35

±6

2.5

+2.0 -1.5

Table ПЗ.5



parts of weld

Welding tech-nique

S =S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting devia-tion

14 17

16 20 ±4 2.0 ±1.5

18 22

20 25

22 28

25 30

±5

2.5

+2,0 -1.5

28 35

1-02-1 (C-2-1)

10

30 37 ±6 2.5

+2,5 -1.5

Table ПЗ.6



parts of weld

Welding tech-nique

S =S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting deviation

14 25

16 27 18 30

±5

2.5 +2.0 -1.5

20 33

22 35

25 40

±6

2.5

+2.5 -1.5

28 45

30 47

32 50

36 54

1-03 (C-3)

11 30 40 52

40 60

±8

3.0

+2.5 -2.0

Table ПЗ.7

Structural elements e =e1,mm g =g1, mm Welded joint legend


parts of weld

Welding tech-nique

S=S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting deviation

20 22 25

15 17 19

±4

2.0

±1.5

28 32 36 40

21 23 26 28

±5

2.5

+2.0 -1.5

45 50 55

32 35 38

±6

2.5 +2.0

-1.5

1-03 (C-3)

10

60 43 ±8 3 +2.5 -2.0

Table ПЗ.8



of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting deviation

30 32 34 36 38 40

34 35 36 37 38 39

±6

2.5

+2.5 -1.5

42 45 50 55 60 65 70

42 44 47 50 53 56 59

±8

3.0

+2.5 -2.0

1-05 (C-5)

10

75

80

63

66

±10

3.5

±2.5

Table ПЗ.9



of weld

Welding tech-nique

S =S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting deviation

30 32 34 36 38

35 36 37 38 39

±6

2.5

+2.5 -1.5

40 42 45 50 55 60 65 70

42 44 47 49 52 54 58 61

±8

3.0

+2.5 -2.0

1-05-1 (C-5-1)

For welded joints of parts made of austenitic steel

30

75 80

65 68

±10 3.5 ±2.5

Table ПЗ.10

Structural elements e=e1, mm g=g1, mm Welded joint legend


parts of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting deviation

50 55 60 65 70

34 35 37 38 40

±6

2.5

+2.5 -1.5

75 80 90 100 110 120 130

43 44 47 50 53 56 59

±8

3.0

+2.5 -2.0

1-06 (C-6)

10

140 150

64 67

±10 3.5 ±2.5

Table ПЗ.11

Structural elements e =e1, mm g =g1, mm Welded

joint legend


of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting deviation

50 55 60 65 70

35 37 38 40 43

±6

2.5

+2.5 -1.5

75 80 90 100 110 120 130

44 47 50 53 56 59 64

±8

3.0

+2.5 -2.0

1-06-1 (C-6-1)

For welded joints of parts made of austenitic steel

10

140 150

67 70

±10 3.5 ±2.5

Table ПЗ.12

Structural elements e =e1, mm g =g1, mm Welded joint legend


parts of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limiting deviation

50 55 60 65 70

35 37 38 40 43

±6

2.5

+2.5 -1.5

75 80 90 100 110 120 130

44 47 50 53 56 59 64

±8

3.0

+2.5 -2.0

1-06-2 (C-6-2)

30

140 150

67 70

±10 3.5 ±2.5

Table ПЗ.13

Structural elements h, mm e, mm e1, mm g1, mm Welded joint legend


of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

100 15 85 30 ±5

2.5

+2.0 -1.5

120 20 90

34

140 25 96 36

160 30 102 39

±6

2.5 +2.5 -1.5

180 35 108 44

1-07 (C-7)

10

200 40

±0.1h

114

±12

47

±8

3.0

+2.5 -2.0

Table ПЗ.14

Structural elements h, mm e, mm e1, mm Welded joint legend



Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

180 40 82 48

200 45 88

50

220 50 92 52

240 55 97 54

260 60 102 56

280 65 107 58

300 70 112 60

1-07 (C-7)

10

350 80

±0.1h

120

±12

64

±8

Table ПЗ.15

Structural elements e, мм g, мм Welded joint legend

of prepared edges of the welded parts of weld

Welding tech-nique

S=S1, мм Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

30

48

35 53

40 58

±8

3.0

+2.5 -2.0

45 64

50 69

Gap between the “nib” and the welded part should exceed 2 mm. The option with backing ring or the plate.

55 74

60 78

±10

3.5

±2.5

65 85

70 89

75 93

1-09 (С-9)

10 30

80 97

±12

4.0

±3.0

1.“Nib”; 2. Root section to be removed by machining 3. Backing ring (plate)

Table ПЗ.16

Structural elements е =е1, mm g =g1, mm Welded joint legend


parts of weld

Welding tech-nique

S =S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

60 64

70 68 ±10

3.5

+2.5 -2.0

80 74

90 78

100 82

Backing ring or plank option

120 89

140 97

±12

4.0

±3.0

160 105

180 113

1-10 (C-10)

10

30

200 120

1.“Nib”; 2. Root section to be removed by machining 3. Backing ring (plate)

Table ПЗ.17

Structural elements e=e1, mm g=g1, mm Welded

joint legend


of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

14 15 16 16

18 17

20 18

22 20

±4

2.0

±1.5

25 22 28 24 30 25 32 27

36 29

±5

2.5

+2.0 -1.5

40 32

45 35

50 38

±6

2.5

+2.5 -1.5

1-11 (C-11)

11 30 40

52

55 43

±8

3.0

+2.5 -2.0

Table ПЗ.18

Structural elements R, mm e, mm g, mm Welded joint legend


of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

30 32

35 35

40 38

±6

2.5

+2.5 -1.5

45 43

50 46

55 53

1-12 (C-12)

11 30

40

60

6 8

±1

56

±8

3.0

+2.5 -2.0

Table ПЗ.19

Structural elements e, mm g1, mm Welded joint legend



Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

60 48

65 50

70 52

75 54

80 56

90 60

±8

3.0

+2.5 -2.0

100 66

110 70

120 74

130 78

1-13 (C-13)

11 30 40

140 82

10

±12

3.5

4.0

±2.5

±3.0

Table ПЗ.20

Structural elements e, mm g, mm Welded

joint legend of prepared edges of the


Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

2 7

3 8

1-14 (C-14)

30

53

4 9

±2

±3

1.5 ±1.0

3 10

4 11

5 12

1-15 (C-15)

31

40 52 53 6 15

±3

±4

2.0

2.0

+1.0 -1.5

±1.5

Table ПЗ.21

Structural elements b, mm e, mm g, mm Welded joint legend


of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

5 12 ±3

+1.0 -1.5

7 15

10

2

19

±4

2.0 ±1.5

15 27 ±5 +2.0 -1.5

20 34 ±6

2.5

+2.0 -1.5

25 42

1-16 (C-17)

31

40

52

30

3

±1

49

±8 3.0 +2.5 -2.0

Table ПЗ.22

Structural elements b, mm Sn, mm e, mm g, mm Welded joint legend


of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

4 12

6 15

8 18

±3

±4

2.0

+1.0

-1.5

±1.5

10 22

12 25

15 29

18 34

20 36

±1,5

±6

2.5

+2.0 -1.5

+2.5 -1.5

25 45

28 48

30 51

36

4

5

57

±8

3.0

+2.5 -2.0

1-17 (C-16)

32

42

53

40

±0.1

2

3

+1

62 ±10 3.5 ±2.5

Table ПЗ.23



of weld

Welding technique

S=S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

14 16

16 17

18 19

20 20

22 22

25 24

28 26

30 27

32 28

36 31

40 33

45 37

50 40

55 44

1-18

(C-18)

30

40

53

52

60 48

±4

±5

±6

±8

2.0

2.5

3.0

±1.5

+2.0

-1.5

+2.5

-1.5

+2.5

-2.0

Table ПЗ.24

Structural elements bр, mm R, mm e=e1, mm g=g1, mm Welded joint legend


of weld

Welding tech-nique

S=S1,

mm Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting devia-tion

20-34

22

28

±4

2.5

±1.5

35-80

26

33

±5

3.0

±2.0

1-19

(C-19)

20

81-500

30

-

38

±6

3.5

±2.5

20-34

22

10

28

±4

2.5

±1.5

35-80

26

12

33

±5

3.0

±2.0

1-20

(C-20)

20

81-500

30

±2

14

±1

38

±6

3.5

±2.5

Table ПЗ.25

Structural elements e, mm g, mm g1, mm Welded joint legend



Welding tech-nique

S=S1,

mm Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

1.0

1.5

4

1-21

(C-21)

51

52

2.0 5

±2

1.0 +1.0 -0.5

0.5

+1.0 -0.5

2.0 7 ±2 1.5

2.5 9

1-22

(C-22)

53

52

40 3.0 10

±3

2.0

+1.0 -0.5

+1.5 -1.0

0.5

+1.0 -0.5

3.0 7 ±2 1.5 +1.5 -0.5

4.0 9

0.5 +1.0 -0.5

5.0 11

1-23

(C-23)

53

52

40

6.0 12

±3 2.0

+1.5 -1.0

1.0

±1.0

Table ПЗ.26

Structural elements e, mm g, mm g1, mm ь, nn Welded joint

legend of prepared edges of the


Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Not more than

1-21-1 (C-21-1)

51

52

0,3 0,4 0,5 0,6 0,8 1,0 1,5 2,0

3 4

+1

+2

0.2

0.3 0.4

0.8 1.0

0.2

0.25 0.3 0.4 0.5

0.1

0.2

For sheet thickness S=1÷2 mm it is permitted to use filler wire of d=1÷2 mm.

Table ПЗ.27




Welding technique

S=S1, mm Nominal

value Limiting deviation

Nominal value

Limit-ing

devia-tion

1.5 4

2.0 2.5 3.0

5

±2

3.5 4.0 4.5

6

1-21-2 (C-39)

51 52

5.0 6.0 7.0

7

±3

1.5

±1.0

Table ПЗ.28

Structural elements e, mm g, mm g1, мм

Welded joint legend


parts of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

1.5 2.0

6 7

±2

1-21-1 (C-22-1)

52

53 40

2.5 3.0 3.5

8 9 10

±3

1.0

±0.5

Table ПЗ.29

Structural elements e, mm g, mm g1, mm Welded

joint legend of prepared edges of the


Welding tech-nique

S=S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

4 9 0.5

+1.0 -0.5

5 10

6 11

±3

+1.5 -1.0

8 15

10 17

±4

2.0

+2.0 -1.0

12 21

1.0

±1.0

14 23

16 26

18 28

±5

+2.0

-1.5

20 32

22 34

25 38

±6

2.5

+2.5 -1.5

28 44

1-24

(C-18)

53

52

40

30 46

±8

3.0 +2.5 -2.0

1.0

+1.5 -1.0

Table ПЗ.30

Structural elements e, mm g1, mm Welded joint legend



Welding technique

S=S1, mm Nominal


Nominal value

Limiting deviation

4 5 6

11 12 14

±3

8 10

16 19

±4

1.5

+1.5 -1.0

1-21-2 (C-39)

51 52

12 14 16

22 24 26

±5

2.0

+2.0 -1.5

Table ПЗ.31




Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

4 10 0.5

+1.0 -0.5

5 11

6 12

±3

+1.5 -1.0

8 17

10 19

±4

2.0

+2.0 -1.0

12 24

1.0

±1.0

14 27

16 30

18 32

±5

+2.0 -1.5

20 37

22 40

±6

2.5

+2.5 -1.5

25 44

28 51

1-24-2 (C-24-2)

40 51 52

30 53

±8

3,0

+2.5 -2.0

1.0

+1.5 -1.0

Table ПЗ.32


of prepared edges of

the welded parts of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

6 15

8 16

10 18

1.0

±1.0 12 20

±4

2.0

+2.0 -1.0

14 21

16 22

18 23

20 24

22 26

25 28

28 30

±5

+2.0 -1.5

1-25 (C-25)

40

52

30 32 ±6

2.5

+2.5 -1.5

1.0

+1.5 -1.0

Table ПЗ.33



parts of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

4 5 6

10 11 12

±3.0

1.0

+1.5 -0.5

8 10 12 16 18 20

13 14 16 18 20 23

±4.0

1.5

+1.5 -1.0

1-25-1 (C-42)

40 52

26 28 30 34 36 40

28 31 33 37 40 44

±5.0

2.0

+1.0 -1.5

N o t e . It is permitted to fabricate the root weld with melting insert as in Fig. 5. In doing so, the nominal value of "e" should be increased by 2 mm.

Table ПЗ.34


Welded joint legend



Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

2.0

+2.0 -1.5

6 8 10 12 14 16 20

13 14 15 16 17 19 20

±4

1-25-2 (C-25-1)

40

52

26 28 30

23 24 25

±5

2.5 ±2.0

N o t e . It is permitted to fabricate the root weld with melting insert as in Fig. 5. In doing so, the nominal value of "e" should be increased by 2 mm.

Table ПЗ.35


Welded joint legend



Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

6 8

10 11

±3 1.0 +1.5 -0.5

10 12 16 18 20

12 14 16 18 21

±4 1.5 +1.5 -1.0

1-25-3 (C-42-1)

40

52

26 28 30 34 36 40

26 29 31 35 38 42

±5

2.0

+1.0 -1.5

Table ПЗ.36


Welded joint legend


of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

6 8 10 12 14

11 12 13 14 15

2.0

+2.0 -1.5

16 20

17 18

±4

1-25-4 (C-25-2)

40 52

26 28 30

22 23 24

±5

2.5

±2.0

Table ПЗ.37


Welded joint legend



Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

8 10 12 14 16 18 20

11 12 13 14 15 16 17

±3

1-25-5 (C-42-2)

52 40

26 30 34 40

18 19 20 21

±4

1.5

±1.0

Table ПЗ.38


Welded joint legend



Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

8 10 12 16 18 20

12 13 14 15 16 17

±3

1-25-6 (C-25-3)

52

40

26 28

19 21

±4

1.5

±1.0

Table ПЗ.39


Welded joint legend


parts of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

2.5

+2.5 -2.0

1-25-7 (C-27)

30 40

38 40 42 45 50 55 60 65 70

27 28 29 30 31 33 35 37 39

±5

3.5

+2.5 -3.0

Table ПЗ.40


Welded joint legend


of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

2.5

+2.5 -2.0

1-25-8 (C-27-1)

52 40

38 40 42 45 50 55 60 65 70

21 22 23 24 26 27 28 29 31

±5

3.5

+2.5 -3.0

Table ПЗ.41

Structural elements b, mm E, mm g,mm g1, mm Welded joint legend



Weld-ing

tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limiting devia-tion

10 15

15 17

20 19

+2

25 21

30 22

35 24

11

40

0

±0.3

26

+4

10 17

15 19

20 21

+2

25 23

30 24

35 26

1-25-9 (C-27-2)

30

40

40

1.5

±0.5

28

+4

2

+2.0 -1.5

1

±1.0

Table ПЗ.42




Welding technique

S=S1, mm Nominal


Nominal value

Limit-ing

devia-tion

3,0

10

3,5

11

4,0

12

±3

+1.0 -1.5

4,5

13

1-26 (C-26)

52

42

32

5,0

14

±4

2.0

±1.5

Table ПЗ.43




Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

3.0

10

3.5

4.0

11

0.5

+1.0 -0.5

4.5

12

±3

+1.5 -1.0

5.0

14

5.5

15

6.0

16

1-27 (C-40)

52

40

7.0

17

±4.0

2.0

+2.0

-1.0

1.0

±1.0

Table ПЗ.44

Structural elements e, мм g, мм g1, мм Welded joint legend


of weld

Welding technique

S=S1, мм Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

5.0

5.5

6.0

9

7.0

8.0

10

9.0

1-28 (C-28)

52

40

10.0

11

±3

2.0

+1.5 -1.0

1.0

±1.0

Table ПЗ.45



of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

2 7

3 8

4 9

5 10

6 14

8 18

1-28-1 (C-28-1)

1-perlitic steels (alloyed up to 6 mm); 2 –austenitic steels

30

10 22

+3

1.5

±0.5

Table ПЗ.46



of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

6 18

8 20 ±4 2.0 ±1.5

10 22

12 24

14 25

16 26

18 28

20 29

22 30

±5

+2.0 -1.5

25 32

28 34

1-29 (C-29)

53 42

32

30 35

±6

2.5

+2.5 -1.5

Table ПЗ.47




Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

6 20

8 22 ±4 2.0 ±1.5

10 24

12 26

14 27

16 28

18 30

20 31

22 32

±5

+2.0 -1.5

25 34

28 36

1-29-1 (C-29-1)

32

42

30 37

±6

2.5

+2.5 -1.5

Table ПЗ.48




Welding technique

S=S1, mm Nominal


Nominal value

Limit-ing

devia-tion

6 15

8 17 ±4 2.0 ±1.5

10 21

12 23

14 26

16 29

±5

+2.0 -1.5

18 32

20 34

22 37

±6

2.5

+2.5 -1.5

25 43

28 46

1-30 (C-31)

53

42

32

30 49

±8

3.0

+2.5 -2.0

Table ПЗ.49




Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

6 15

8 17

10 18

12 20

±4

2.0

+2.0 -1.0

1.0

±1.0

14 21

16 22

18 23

20 25

22 27

25 28

28 30

±5

+2.0 -1.5

1-31 (C-30)

40

30 31 ±6

2.5

+2.5 -1.5

1.0

+1.5 -1.0

Table ПЗ.50

Structural elements e, mm g, mm g1 , mm Welded joint legend



Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

8 19

9 20

±4

2.0

+2.0 -1.0

10 22

12 23

14 24

16 25

18 26

20 27

22 29

25 30

±5

28 33

1-32 (C-32)

40

30 34

±6

2.5

+2.0 -1.5

+2.5 -1.5

1.0

1.0

±1.0

+1.5 -1.0

Table ПЗ.51

Structural elements e, mm e1, mm Welded joint legend


of weld

Welding technique

S=S1, mm Nominal


Nominal value

Limiting deviation

90 35 30

120 38 31

150 41 33

180 44 35

240 49 38

300 55 41

1-33 (C-33)

10

360 61

±6

44

±5

Table ПЗ.52

Structural elements e, mm e1, mm Welded joint legend


parts of weld

Welding tech-nique

S=S1, mm Nominal


Nominal value

Limiting deviation

60 7 24 ±6

100 9 32 ±7

150 11 40 ±8

1-34 (C-34)

10

11

250

12

±1

50

±10

Table ПЗ.53

Structural elements α, deg B, mm e, mm Welded joint legend


of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

40 3 9 20 ±5

60 2 14 25 ±6

100 2 18 32 ±6

150 2 22 40 ±8

1-35 (C-35)

10

250 2

±1

24

±1

50 ±10

Root section to be removed by machining

Table ПЗ.54

Structural elements α, deg B, mm e, mm Welded joint legend


of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

40 3 9 20 ±5

60 2 14 25 ±6

100 2 18 32 ±6

150 2 22 40 ±8

1-36 (C-36)

12

250 2

±1

24

±1

50 ±10

Table ПЗ.55



of weld

Welding technique

S, mm S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

10 19 ±4 2.0 ±1.5

12 22

14 26

16 29

±5

+2.0

-1.5

18 32

2-01 (У-1)

11

31

40

20

≥0.75S

35

±6

2.5

+2.5

-1.5

Table ПЗ.56

Structural elements h, mm e, mm g, mm e1, mm g1, mm Welded joint leg-

end of prepared edges of the welded parts

of weld

Weld-ing

tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

20 25

22

7 28

±5 +2.0

-1.5

16

8

25 32

28

8 36

18

±3

9

30 38

±6

2.5

+2.5

-1.5

34

10

44

21

10

36 47

2-02

(У-2)

10

30

40

12

±1

50

±8

3.0

+2.5

-2.0

24

±4

12

±2

Table ПЗ.57




Welding technique

S=S1, mm Nominal


Nominal value

Limiting deviation

4 14 7

6 17 8

8 20

±3

10

+3

-2

10 24 12

12 28

±4

14

±3

14 32 16

16 36 18

18 40

±5

20

+4

-3

2-03

(У-3)

52

32

42

20 44 ±6 22 ±4

A layer of metal to be removed by machining Table ПЗ.58



of weld

Welding technique

S=S1, mm Nominal


Nominal value

Limiting deviation

4 14 7

6 17 8

8 20

±3

10

+3

-2

10 24 12

12 28

±4

14

±3

14 32 16

16 36 18

18 40

±5

20

+4

-3

2-04

(У-4)

52

32

42

20 44 ±6 22 ±4

A layer of metal to be removed by machining

Table ПЗ.59



of weld

Welding tech-nique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

4 5

5 6

+2

6 8

5

+2

8 11 6

10 14 8

12 17 9

14 20

+3

10

±3

16 23 11

18 26 13

2-03 (У-3)

The size is established for each specific joint. The recommended ratio for the joint is D/D1≤0.4

32

20 28

+4

14

±4

Table ПЗ.60

Structural elements e, mm e1, mm g, mm g1, mm Welded joint leg-

end


of weld

Welding tech-nique

S1, mm Nomi-

nal value

Limit-ing

devia-tion

Nomi-nal

value

Limit-ing

devia-tion

Nomi-nal

value

Limit-ing

devia-tion

Nomi-nal

value

Limiting devia-tion

4 7 4

6 10

±2

6

±2 5

+2 -1

3

8 14 7

10 16

8

8

4

12 20

±3

10

+3 -2

14 24

10

±3

12

5

+2 -1

16 26 13

18 28

14 14

7

20 30

±4

15

+4 -3

22 34 17

3-01 (T-1)

10

11

31

40

25 37

±5

18

±4

18

+5 -4

9

+3 -2

Table ПЗ.61



of weld

Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

10 8 4

15 12

±2 6

+2 -1

20 15 7

25 18

±3 9

+3 -2

30 23 11

40 30

±4 15

+4 -3

50 37 ±5 18 +5 -4

60 44 22

70 52 26

80 60

±6

30

+6 -5

90 67 33

3-02 (T-2)

10

100 74

±8 37

+8 -6

Table ПЗ.62

Structural elements h, mm е, mm g, mm Welded joint legend



Welding technique

S=S1, mm Nominal

value Limit-

ing devia-tion

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

1.0 1.5 3.5

1.5 2.0 4.5

0.5

±0.5

2.0 2.5 5.5

2.5 6.5

4-01 (У-6)

52

3.0

3.0

7.0

+1.5 -0.5

1.0

+1.0 -0.5

1.0 3.0

1.5 3.5

2.0 4.0

+1.5 -0.5

2.5 4.5

кумен

4-02 (У-7)

Minimum distance between weld edges t is established by the design documentation.

51

3.0

±0.2

5.0

+2.5 -0.5

-

-

Table ПЗ.63

Structural elements e, mm Welded joint legend



Welding technique

S=S1, mm Nominal

value Limiting devia-

tion

1.0

1.5

2.0

3.0

3.5

4.0

+1.5

-0.5

4-03 (У-8)

51

2.5

3.0

4.5

5.0

+2.5

-0.5

Table ПЗ.64

Structural elements h1, mm R, mm Welded joint legend



Welding technique

S, mm

Nominal value

Limiting deviation

Nominal value

Limiting deviation

t, mm, not less than

1.0 0.5

1.5

3.5 0.8

2.0 4.0 1.0

2.5 4.5 1.2

4-04 (У-9)

51

3.0 5.0

±0.5

1.5

±0.2

1.0

1.5

2.0

2.5

3.0

Table ПЗ.65


Welded joint legend


parts of weld

Welding technique

S=S1, mm

Nominal value

Limit-ing

devia-tion

Nominal value

Limit-ing

devia-tion

22 24 26 30 34 40 44 50

36 39 41 46 49 59 64 72

+3

2.0

+2 -1

4-05 (У-10)

40

54 60 64 70

76 87 90 97

+3

3.0

±2


AMENDMENT № 1

to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying Welding .

Basic Provisions”

Moscow 2000

Federal Nuclear and Radiation Safety Authority of Russia

(GOSATOMNADZOR OF RUSSIA)


Attachment to By Gosatomnadzor of Russia Order № 8 of December 27, 1999

AMENDMENT № 1

to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying. Basic Provisions”

Effective since September 1, 2000

Moscow 2000

AMENDMENT № 1

to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power Installations. Welding and Overlaying.

Basic Provisions”

Content of the Amendment: 1. Title page. 1) To replace the name of the federal executive body “The

State Committee of the USSR for Supervision over Safe Conduct of Operations in Nuclear Power (Gosatomenergonadzor of the USSR)” with the name “The Federal Nuclear and Radiation Safety Authority of Russia (Gosatomnadzor of Russia)”.

2) The free space of the Title page of PNAE G-7-009-89 document below its title should have the wording: “Effective as amended, Amendment № 1 (see Gosatomnadzor of Russia Order № 8 of December 27, 1999). The following items were modified: paragraph 1.4; Table 4; paragraph 2.18; Table 10; paragraphs 9.13, 11.1-11.5; Section 13; Attachments 1, 3".

2. Paragraph 1.4. It should be read as follows: 1.4. Welding of materials, which are not indicated in these BP but permitted for use by the NPI Rules, is permitted in accordance with the PED developed by the manufacturing enterprise (assembling organization) taken into account the requirements of these BP as agreed with the leading material study organization and duly approved by Gosatomnadzor of Russia. It is permitted to apply the PED developed by the leading material study organization. Note.

The Leading Material Study Organization is the organization acknowledged by a respective atomic energy use entity as the one to render services to a utility and other entities in selection of materials, welding, quality assurance of manufacturing of equipment and piping and to review design, engineering documentation and documents justifying nuclear and radiation safety of NPI, and the organization having a license for the relevant activities issued by Gosatomnadzor of Russia.

The agreement of a leading material study organization should mean its positive conclusion. 3. Table 4. Welding materials for fabricating the welded joints

of parts made of austenitic steel with the parts made of perlitic and high-chromium steels (except for welded joints of Categories Iн and IIн).

Note. Paragraph 7. To replace the wording “the leading interagency material

study organization” with the wording “the leading material study organization”.

4. Paragraph 2.18. 1) The first paragraph. To replace the wording “the leading interagency material

study organization” with the wording “the leading material study organization”.

2) The third paragraph. To replace the wording “the leading interagency material

study organization” with the wording “the leading material study organization”, then Paragraph 2.18 should read:

2.18. Tempering quality of each setting of welding electrodes H-10, fluxing agents KФ-I6 and КФ-27, as well as welding elec-trodes УОНИИ-13/45А and УОНИИ-13/55 to be used for welding of parts made of steel grade 10X2M among themselves and with parts made of perlitic steels, is determined by hydrogen content in the overlaid metal or weld metal in accordance with the methodol-ogy of the leading material study organization.

At this, the hydrogen content in the overlaid metal (weld metal) in case of manual arc welding should not exceed 2.5 cm3 per 100 g, and in case of automated hidden arc welding it should not exceed 3.0 cm3 per 100 g. Should the results be negative the re-tempering of welding electrodes and fluxing agents is done fol-lowed by the determining of hydrogen content.

It is allowed, upon agreement with the leading material study organization, to skip the determining of hydrogen content in the overlaid metal when individual batches of welding materials designated for welding of specific parts are checked.

5. Table 10. Recommended tempering modes for coated welding electrodes and fluxing agents.

The footnote “It is permitted to reduce the tempering tem-perature down to 400±20 0С, as agreed upon with the leading in-teragency material study organization.” Should be read as follows:

It is permitted to reduce the tempering temperature down to 400±20 0С, as agreed upon with the leading material study organization. 6. Paragraph 9.13. To replace wording "and Regional Office of

Gosatomenergonadzor of the USSR" with the wording "and duly approved by Gosatomnadzor of Russia", then Paragraph 9.13 should read:

9.13. Elimination of defects on one and the same section of a welded joint or overlaid part is permitted only for three times. At this, the corrected section should mean a rectangle of a lest area, which fits the fall subject to welding, and the adja-cent surfaces at a distance equal to three-time width of the said rectangle (Fig. 4).

The issue concerning the correction of defects on one and the same section of the welded joints (overlaid part) in excess of three times should be resolved subject to an agreement with the leading material study organization and duly approved by Gosatomnadzor of Russia. 7. Section 11. Safety Requirements.

To replace the title of the Section with the title “Safety-at-Work Requirements”.

8. Paragraphs 11.1 - 11.5. To delete the paragraphs. 9. Section 13. Deviation from Established Requirements. To replace the wording "and Gosatomenergonadzor of the

USSR” with the wording “and approved by Gosatomnadzor of Russia”, then the Section 13 should read as follows:

13. Deviation from Established Requirements. Where it is technically or economically unreasonable to follow individual requirements of this document it is permitted to de-viate from them provided there are justifications formalized in joint technical solutions made by the design organization and manufacturing enterprise (assembling organization) as agreed upon with the leading material study organization and approved by Gosatomnadzor of Russia.

10. Attachment 1 (reference). Reference book of regulatory and technical documentation for welding materials permitted for manufacturing, assembling and repair of equipment and piping of nuclear power installations

Notes. Paragraph 1. To replace the wording “Gosatomenergonadzor of the USSR”

with the wording "Gosatomnadzor of Russia", then paragraph 1 Notes should read:

The documents marked with an asterisk are listed in the addi-tional Reference Book of Gosatomnadzor of Russia.

11. Attachment 3 (recommended). Main Types of Welded Joints.

The wording “Tables П3.1-ПЗ.65 give two legends for a welded joint: the main one and bracketed one. The main legend should be used in the design documentation intended for applica-tion in the COMECON countries (including the USSR). It is permit-ted to use the bracketed legend only in the design documentation intended for application in the USSR.” Should be replaced with the following:

Tables П3.1 - П3.65 give two legends for a welded joint: the main one and bracketed one. For the design documentation to be used in Russia it is permitted to the bracketed legend.

Regulatory document

AMENDMENT № 1

to PNAE G-7-009-89 “Equipment and Piping of Nuclear Power

Installations. Welding and Overlaying.

Basic Provisions”

Editor in charge Sinitsyna T.V.

Computer design Zernova E.P., Tarasova V.P., Chenykaev D.M.

Design by STID of SEC NRS of Gosatomnadzor of Russia

Telephone: 275-0023 ext. 22-24

Documents

AMENDMENT 1 to PNAE G-7-009-89 “Equipment and Piping of ...en.gosnadzor.gov.ru/framework/nuclear/PNAE G-7-009-89.pdfWelding electrodes УОНИИ -13/45 АА , УОНИИ -13/55