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8/16/2019 ASME IX Interpretation-Part2
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Interpretation Detail Print to PDF
Please limit your selection on the search results screen to 10 interpretations.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-462.2(a) Removal of Backing Ring for Side Bend Tests
Date Issued: 06/27/1979
Record Number: BC-79-315
Interpretation Number : IX-79-50
Question(s) and Reply(ies): Question: Is it acceptable to remove weld reinforcement, backing strip or
backing ring flush with the undisturbed surface of the base material before
performing a side bend test?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, SMAW Procedure Qualifications
Date Issued: 12/13/1978
Record Number: BC-78-113
Interpretation Number : IX-78-100
Question(s) and Reply(ies): Question: Is DC straight (electrode negative) polarity permitted by Section
IX for procedure qualifications using E7018 (SFA 5.1) electrodes?
Reply: Yes, straight polarity is permitted. Section IX places no limits upon
polarity for SMAW procedure qualifications other than those imposed by
QW-409.1 (Supplementary Essential Variables) and QW-409.8
(Nonessential Variables).
Standard Designation: BPV Section IXEdition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Semi-Automatic and Automatic Welding
Date Issued: 12/14/1978
Record Number: BC-78-662
Interpretation Number : IX-78-101
Question(s) and Reply(ies): Question: Are separate performance qualifications required for one person,
acting as both welder and welding operator, using the same process within
the same essential variables?
Reply: Yes.
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Question: Must the performance qualifications for welders and welding
operators be maintained and renewed separately?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-407.1, PWHT of Weld Procedure
Date Issued: 12/15/1978
Record Number: BC-78-488
Interpretation Number : IX-78-102
Question(s) and Reply(ies): Question (1): What is meant by the term "range" as it appears in the
wording for PWHT in QW-407.1?
Reply (1): The Code does not address itself to specifying a postweld heat
treatment temperature range. It would be the responsibility of the
manufacturer or fabricator to develop a temperature range suitable for the
material used and designated in the Welding Procedure Specification. It is
hoped that a postweld heat treatment temperature would be selected to fall
midway in the range developed.
Question (2): How much may the temperature of PWHT of WPS
qualification coupons differ from the PWHT temperature of the vessel?
Reply (2): There is no connection between the PWHT of welded test
coupons and the PWHT requirements of a vessel. The values may be
similar, but are not required to be so by Code requirements.
ATTENTION
The foregoing interpretation has been further considered and the following
corrected interpretation to Question (2) sent to the inquirer.
Corrected Issued: September 25, 1979
Question (2): How much may the temperature of PWHT of WPS
qualification coupons differ from the PWHT temperature of the vessel?
Reply (2): The PWHT of the welded test coupons and the PWHT of the
vessel must be of the same type of PWHT as designated for the variousconditions outlined in QW-407.1
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification for Small Diameter Tubing, QW-
452.3
Date Issued: 12/18/1978
Record Number: BC-78-634Interpretation Number : IX-78-103
Question(s) and Reply(ies):
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Question: "1 in. diameter" tubing may vary (per SA-450) between 0.968
and 1.016 in. in diameter. Under the diameter limitations in QW-452.3, is a
welder qualified on a "2 in." (nominal) pipe qualified to weld the "1 in.
diameter" tube described above?
Reply: No. QW-452.3 is based on nominal pipe sizes for specimen sizes
and qualification limits, the "over 1" minimum qualified outside diameter
keyed to ¾ in. pipe size. SA-53 gives the following O.D. tolerances for ¾in. pipe:
O.D.: 1.050 in. O.D. min : 1.050 - 1/32 in. (i.e. 1.019 in.) O.D. max : 1.050
+ 1/64 in. (i.e. 1.066 in.)
The 1 in. tube in question, varying between 0.968 and 1.016 in. O.D., would
not be weldable under the conditions in question.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-403.16, Diameter Restrictions
Date Issued: 12/21/1978
Record Number: BC-78-778
Interpretation Number : IX-78-104
Question(s) and Reply(ies): Question: Do the diameter restrictions of Section IX, QW-403.16 mandate
requalification of welders for fillet and socket welds in pipe 2f in. nominal
diameter and less when the welders have been qualified in large diameter
groove welds in pipe?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, 1974 Edition, QW-403.6
Date Issued: 06/23/1978
Record Number: BC-78-263
Interpretation Number : IX-78-83
Question(s) and Reply(ies): Question: If the thickness of the test plate or pipe is more than 5/8 in. and
QW-403.6 is specified as a Supplementary Essential Variable, what is the
minimum thickness qualified?
Reply: When QW-403.6 is required as a Supplementary Essential Variable
for notch toughness, the minimum thickness qualified when the test plate or
pipe is greater than 5/8 in. is 5/8 in. The minimum thickness specified in
QW-451 is the minimum thickness qualified, except when QW-403.6 is
listed as a Supplementary Essential Variable.
Standard Designation: BPV Section IXEdition/Addenda:
Para./Fig./Table No:
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Subject Description: Section IX, QW-422, A-Numbers vs. AWS Requirements
Date Issued: 06/23/1978
Record Number: BC-78-266
Interpretation Number : IX-78-84
Question(s) and Reply(ies): Question: Prior to the Winter 1976 Addenda of Section IX, the E8018-C3
electrodes met the A-No. 12 category of QW-442. What is the A-Number
category for this electrode in the revised QW-442 A-Numbers?
Reply: All E8018-C3 electrodes now meet the requirements for A-No. 10 in
QW-442. This was also true in 1976.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-201.1 and QW-201.2
Date Issued: 07/05/1978Record Number: BC-78-404
Interpretation Number : IX-78-85
Question(s) and Reply(ies): Question (1): Is it the intent of QW-201.1 to list on the Welding Procedure
Specification each essential and nonessential variable required for each
process whether the variable is applicable for that particular process or not?
Reply (1): It is the intent of QW-201.1 as stated: "The WPS information
may be presented in any form, written or tabular, to fit the needs of each
manufacturer or contractor as long as every essential and nonessential
variable required of the appropriate welding process or processes (QW-252
through QW-281) is included."
Question (2): Do the requirements of QW-201.2 on the Procedure
Qualification Record require a similar enumeration?
Reply (2): The requirements of QW-201.2 call for the Procedure
Qualification Record to document the essential variables of the applicable
process or processes required by QW-252 through QW-281.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-305
Date Issued: 07/11/1978
Record Number: BC-78-408
Interpretation Number : IX-78-86
Question(s) and Reply(ies): Question: Is it the intent of the Code, QW-305, that if a man qualifies using
a semi-automatic process (submerged arc), is he also qualified using
automatic submerged arc where the arc is positioned via a fully motorized
manipulator?
Reply: It is the intent of the Code that welding operators would be governed
by the requirements of QW-305 which would cover all automatic processes.
Semi-automatic submerged arc process, which would be performed by a
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welder, would need to comply with the requirements of QW-304 and QW-
354.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Summer Addenda, QW-202.2
Date Issued: 07/31/1978
Record Number: BC-78-132
Interpretation Number : IX-78-87
Question(s) and Reply(ies): Question (1): Is there a limit on the minimum depth of deposited metal for
repair or build-up welding? Does this override the minimum limits listed in
Table QW-451.1?
Reply (1): If you limit the weld layers to ½ in. or less in thickness, then the
minimum limits of QW-451.1 are overridden as far as weld metal thickness
is concerned. New work has been done on QW-451.1 which will help
clarify this item.
Question (2): Does qualification on test plates/material less than 3 in. thick
allow repair and build-up welding on base material of thickness up to 2t,
with a depth of deposited metal being limited to a maximum of 2t?
Reply (2): Yes.
Question (3): Does qualification on test plates/material 3 in. thick or greater
allow repair and build-up welding on base material of any thickness, the
depth of the deposited metal is limited to a maximum of 2t?
Reply (3): Yes.
Question (4): Is it permissible to perform repairs deeper than 6 in. using for
qualification plate with a thickness of at least one-half the depth of the
repair?
Reply (4): Yes.
Question (5): Is it correct to assume that the thickness of the material being
repaired refers to the location where the repair is being made?
Reply (5): Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QB-402.1 and QB-402.2 Material Qualification
Date Issued: 08/02/1978
Record Number: BC-78-471
Interpretation Number : IX-78-88
Question(s) and Reply(ies): Question: QB-402.1 and QB-402.2 are Essential Variables for procedure
and performance qualification, respectively, which indicate that a change
from a base metal listed under one P-Number in QB-422 to a base metal
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listed under another P-Number or to any other base metal require
requalification. Can a procedure which is qualified using ASME SB-12
Alloy 122 be used for the brazing of ASME SB-42 Alloy 122 (P-No. 107)
material? Can a procedure which is qualified with ASME SB-466 Alloy 706
(similar to P-No. 107 material, SB-111 Alloy 706) be used to qualify a
brazing procedure for joining SB-12 Alloy 122 (similar to P-No. 107
material, SB-42 Alloy 122)?
Reply: The answer to both questions presented is in the affirmative that
qualification with Alloy 122 or Alloy 706, both included in P-No. 107, will
qualify all other product forms of that same alloy. The Committee
recognizes that the P-Number tables of the Brazing Section of Section IX
need revision and updating to cover the other product forms for alloys now
listed. The precedent of permitting other product forms of similar chemistry
materials has been well established in all the book sections of the Code in
their General Requirements paragraphs on materials.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-201.3
Date Issued: 08/03/1978
Record Number: BC-78-466
Interpretation Number : IX-78-89
Question(s) and Reply(ies): Question: Is it acceptable to delete a GMAW root pass (using E70T-1 wire)
which was initially in a qualified combination procedure with SAW
remainder using a F 72-EM12K flux/filler (base material is P-No. 1, Group
2), and add an SMAW root pass using E7018 electrode, withoutrequalification, provided that the SMAW procedure is qualified within the
thickness range for that process?
Reply: It is the intent of QW-201.3 to allow the deletion of a GMAW
process which was previously qualified in combination with one or more
other processes and to add an SMAW process without requalification
providing the SMAW process has been qualified within the thickness limits
specified in QW-202.2, QW-403, and QW-451.
Standard Designation: BPV Section IX
Edition/Addenda:Para./Fig./Table No:
Subject Description: Section IX, QW-462.1(a)
Date Issued: 08/11/1978
Record Number: BC-78-438
Interpretation Number : IX-78-90
Question(s) and Reply(ies): Question (1): Referring to QW-462.1(a), may the specified widths of the
reduced section tensile specimens be reduced as follows?
Plate Thickness Present Widths Proposed Width
1 in. or less 1-1/2 in. approx., 1 in. min. 1/2 in. min. Over 1 in. 1 in. min.
3/8 in. min.
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The reason for this inquiry is that the present minimum sizes impose a very
high load requirement on tensile testing equipment. The proposed reduction
would still test significantly more weld cross-sectional area than that tested
by the turned 0.505 in. diameter specimens [QW-461.2(d)], which are also
permitted for procedure qualification tensile testing, and which are more
expensive to prepare.
Reply (1): The widths of the reduced section tensile specimens shall be asspecified in QW-462.1(a). However, your attention is called to QW-141.1,
which permits the mechanical cutting of a single specimen into a number of
approximately equal pieces to accommodate the available testing
equipment. If this provision will not permit specimens which can be tested
within the capabilities of the testing equipment, the specimen of QW-461.2
(d) is to be employed in accordance with the instructions of QW-151.3. The
speci-mens contained in QW-462 are standard specimens used throughout
the welding industry in the various specifications controlling qualification
in which tensile testing is required.
Question (2): Referring to QW-462.1(a), may the specified thickness of
reduced specimens be reduced by a maximum of 10% of the platethickness? (This is in addition to grinding the reinforcement flush.)
Reply (2): The Code does not specify any maximum reduction in the
thickness. The minimum amount of material needed to produce parallel
surfaces shall be removed from the test specimen. Figure QW-462.1(a) was
revised in the Summer 1978 Addenda to Section IX recognizing that a test
specimen will distort during welding. Cold straining is permitted prior to
the removal of the weld reinforcement. These revisions were made to
clarify the intent of the Committee.
Standard Designation: BPV Section IXEdition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-302.3 and QW-452.3
Date Issued: 08/14/1978
Record Number: BC-78-487
Interpretation Number : IX-78-91
Question(s) and Reply(ies): Question (1): QW-302.1 requires that the type and number of specimens for
performance qualification to be in accordance with QW-452. QW-452.3
specifies two bend tests for each performance qualification. However, QW-302.3 requires four specimens from pipe in positions 5G or 6G of QW-
461.3 removed in accordance with the sequence of QW-463.2(d) or (e).
What are the proper requirements: the two bend tests of QW-452.3 or the
four bend tests required by QW-302.3?
Reply (1): The four bend tests required by QW-302.3 are correct. The
Summer 1978 Addenda of Section IX has revised QW-452.3 to correct this
inconsistency.
Question (2): QW-452.3 of Section IX specifies that a welder must weld a
performance qualification coupon with a thickness of 3/4 in. and over to
have an unlimited maximum thickness qualification. SA-106 has a
minimum thickness of 0.656 in. for a nominal thickness of 0.75 in. Can a
performance qualification specimen that is greater than 0.656 in. but less
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than 0.75 in. thick be used to qualify a welder for an unlimited maximum
thickness?
Reply (2): No. The thickness of the performance qualification must be 3/4
in. (0.750 in.) or over for an unlimited qualification.
Standard Designation: BPV Section IXEdition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification on Combination Welding
Date Issued: 09/25/1978
Record Number: BC-78-547
Interpretation Number : IX-78-92
Question(s) and Reply(ies): Question (1): If a welder makes a combination performance qualification
test weld using GTAW and SMAW on 0.75 wall pipe, can he make
production welds in combination to unlimited thickness?
Reply (1): The welder does not have unlimited thickness qualification. He is
limited to the sum of the thickness qualified by each welding process in the
performance qualification test weld as listed in QW-452.
Question (2): If a welder makes a combination test weld with GTAW and
SMAW on 0.500 wall pipe, what is the maximum wall thickness he can
weld in combination if we assume 3/16 in. of GTAW is deposited in both
the test weld and the production weld while the remaining 5/16 in. is
deposited with SMAW?
Reply (2): Since the inquiry has restricted the GTAW to 3/16 in. for both
the test weld and the production weld, the only variable shall be the amountdeposited by the SMAW. The maximum amount that can be deposited by
the SMAW process in addition to the 3/16 in. of the GTAW is 5/8 in. by the
SMAW process.
Question (3): When a welder is tested in combination, is it required to
measure the actual thickness of the GTAW weld deposit with a depth gage?
Reply (3): The method of measurement of the actual thickness of the
GTAW weld deposit is left to the stamp holder. The Code does not specify
the actual method of measurement.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-214.1
Date Issued: 10/04/1978
Record Number: BC-78-558
Interpretation Number : IX-78-95
Question(s) and Reply(ies): Question (1): Under the requirements of QW-214.1, is the test plate
thickness for production base metal greater than 1 in. required to be at least1 in. thickness?
Reply (1): Yes.
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Question (2): Under the requirements of QW-214.1, is the test plate
thickness for production base metal less than 1 in. required to be a thickness
that is as thick as the production base metal (with the understanding that a
thickness less than the production base metal is also acceptable)?
Reply (2): The intent of QW-214.1 is that qualification for production base
metal less than 1 in. thick must be done on test metal which is equal to or
less than the thickness of the production base metal.
Question (3): May Corrosion Resistant Overlay Clad procedures (WPS) that
have been qualified in accordance with Section VIII, UCL-43 (1977
Edition) on ¼ in. or thicker plate be used for all production base metal
thickness providing the existing WPS meets all of the essential variables of
QW-281.2 through QW-281.4?
Reply (3): The production base metal thickness shall be qualified as listed
in QW-214.1.
Standard Designation:BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Electrodes and Flash Butt Welding
Date Issued: 10/02/1978
Record Number: BC-78-553
Interpretation Number : IX-78-93
Question(s) and Reply(ies): Question (1): In applying the requirements of QW-404.4 and QW-404.5 to
electrodes which are not produced in accordance with AWS/SFA
requirements, must requalification be made for each lot or heat item number
of a particular proprietary type of electrode?
Reply (1): Qualification with a proprietary type of electrode which is not in
accordance with an AWS/SFA specification shall qualify those electrodes
as long as the electrodes continue to meet the proprietary requirements for
that particular electrode; that is, proprietary specifications covering
chemistry and strength of the electrode. It is not necessary to requalify new
heats of such new electrodes when they meet the requirements of
proprietary specification. The chemistry and strength of that specification
should be identified in the Welding Procedure Specification by actual
values or references to the appropriate proprietary specification.
Question (2): Since flash butt welding is permitted under the rules of ASMEBoiler and Pressure Vessel Code Section I, why does Section IX not cover
qualification of procedures and operators even though referenced in Section
I for such requirements?
Reply (2): Section IX has not covered some of the automatic welding
processes such as flash butt welding, but the Code has accepted the use of
this welding method when the procedure has been tested to meet the
requirements of QW-451 for a number of specimens and the requirements
of QW-305 for qualification of the operators.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
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Subject Description: Section IX, QW-403.5, QW-406.3, QW-409.1, and QW-410.24
Date Issued: 10/03/1978
Record Number: BC-78-531
Interpretation Number : IX-78-94
Question(s) and Reply(ies): Question (1): In interpreting QW-403.5, must the Welding Procedure
Specification state the group number or the type and grade of material whenthe base metals have specified impact test requirements for the flux cored
arc welding process?
Reply (1): QW-403.5 is a Supplementary Essential Variable for the flux
cored arc welding process and becomes an Essential Variable when notch
toughness testing of the base metals is required by the Section of the Code
to which the vessel is being fabricated. If the Welding Procedure
Specification is to be employed under these conditions, it must state the
P-Number and group number of materials to which the welding procedure
can be applied and which procedure qualification records of the procedure
qualification test will substantiate. QW-403.5 and its other applicable
paragraphs under QW-403 must all be considered as applied to the welding process. QW-403.5 does not conflict with the other specified QW-403
paragraphs but supplements them when notch toughness is a factor.
Question (2): QW-406.3 indicates that an increase in the specified
maximum interpass temperature is cause for requalification of the
procedure. Must the Welding Procedure Specification and the procedure
qualification record list the maximum interpass temperatures, and who
specifies the maximum interpass temperature?
Reply (2): QW-406.3 is a Supplementary Essential Variable where notch
toughness is required by the Section of the Code to which the vessel is
being fabricated. The maximum interpass temperature shall be specified bythe stamp holder and shall be included in both the Welding Procedure
Specification and the procedure qualification record. This shall be the
temperature observed and attained as maximum interpass temperature
during the welding of the welding procedure qualification test coupons.
Question (3): In QW-409.1, are voltage ranges required in the WPS for
Shield Metal Arc welding when using a constant current welding machine,
and what are the maximum amperages and voltages qualified for the WPS?
Reply (3): QW-409.1 has been revised by committee action and will appear
in the Winter 1978 Addenda to Section IX. The essence of the change will
require that the stamp holder shall account for the heat input as measured by
either voltage, amperage, or an increase in weld metal deposited per unit
length beyond that qualified will require requalification. If the stamp holder
chooses to use amperage, voltage, and travel speed for the control of his
heat input, it will be necessary that the Welding Procedure Specification
include nominal ranges of the amperage, voltage, and travel speed to be
observed for all diameter electrodes to be employed in production welding.
These amperage and voltage ranges shall be those observed during the
welding of the welding procedure qualification test assemblies. Even
though the welding machine is a constant potential power source, the
voltage would be included in the WPS so that the Authorized Inspector
could assure himself that the intent of QW-409.1 is being met.
Question (4): In QW-410.24, does the travel speed recorded during the
welding of the welding procedure test coupons become the travel speed for
which the WPS is qualified, regardless of process or electrode size?
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Reply (4): With the revision of QW-409.1 to be published in the Winter
1978 Addenda, QW-410.24 will be deleted as the subject of travel speed is
an essential of heat input. The travel speed recorded during the welding of
the welding procedure test coupon shall be recorded on the procedure
qualification record and should be within the travel speed range for the
applicable electrode size listed within the Welding Procedure Specification.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding and Brazing Qualifications
Date Issued: 12/05/1978
Record Number: BC-78-662
Interpretation Number : IX-78-96
Question(s) and Reply(ies): Question (1): Are separate performance qualifications required for one
person, acting as both welder and welding operator, using the same processwithin the same essential variables?
Reply (1): Yes. Section IX considers welders and welding operators to be
distinct from one another for performance qualification purposes.
Question (2): Must the performance qualifications for welders and welding
operators be maintained and renewed separately?
Reply (2): Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-403.6, Thicknesses Qualified
Date Issued: 12/05/1978
Record Number: BC-78-664
Interpretation Number : IX-78-97
Question(s) and Reply(ies): Question (1 ): Does QW-403.6, which states "For thicknesses less than 5/8
in. (16 mm) the thickness of the test coupon is the minimum thickness
qualified," have any applicability when the test coupon is 5/8 in. and above
in thickness?
Reply (1): QW-403.6 has no effect where the test coupon is 5/8 in. or over
in thickness.
Question (2): When QW-403.6 is listed as an essential variable, what is the
minimum thickness qualified when the test coupon is 5/8 in. or over in
thickness?
Reply (2): As stated above QW-403.6 does not apply to test coupons 5/8 in.
thick and over. The thickness range qualified here would be found in QW-
451 in general and may be limited by other applicable essential variables. If
QW-403.6 is an essential variable, if no other thickness limitation factorscome into play, the minimum thickness qualified by a test coupon ½ in.
thick would be ½ in. For a test coupon, 5/8 in. thick on from there up to but
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not including 3/4 in., the minimum thickness qualified would be 3/16 in.,
per QW-451.
ATTENTION
The foregoing interpretation has been further considered and the following
corrected replies sent to the inquirer.
Correction Issued: August 3, 1979
Replies (1) and (2); For thickness less than 5/8 in., the thickness of the test
coupon is the minimum thickness qualified for production welds. For
thicknesses 5/8 in. or greater, the minimum thickness qualified is 5/8 in.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Lap Dimension Requirements for Reduced-Section TensionTest Specimens, QB-463.3
Date Issued: 12/06/1978
Record Number: BC-78-393
Interpretation Number : IX-78-98
Question(s) and Reply(ies): Question: Is the X=4t min ratio shown in QB-463.3 binding, or may the test
specimen use a shorter lap?
Reply: The X=4t min ratio is not binding; it is included in QB-463.3 as a
typical lap-to-thickness ratio, but it is not in the scope of Section IX to
prescribe joint design. As QB-408.1, which states "A change in the joint
design details; such as, from a butt to a lap or socket, or a change in lap of plus or minus 25%," applies to all brazing procedure qualifications, a
mandatory X=4t min would indeed place a restriction on joint design.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Tension Tests and Material Classifications
Date Issued: 12/07/1978
Record Number: BC-78-663
Interpretation Number : IX-78-99
Question(s) and Reply(ies): Question (1): If a tension test specimen breaks in the weld metal at a
strength not less than that specified for the base metal, is it acceptable?
Reply (1): Yes. QW-153.1 provides for this.
Question (2): If a bend test specimen shows an open defect exceeding 1/8
in. in length on the convex side, is the test coupon acceptable?
Reply (2): Not generally. Your attention is directed to QW-163 for exact
bend test specimen acceptance criteria.
Question (3): What is the A-Number for electrodes having a nickel content
above 4%?
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Reply (3): It is important to state that the A-Numbers apply specifically to
the weld deposit and not to the electrode. A-Numbers 8 and 9 apply to weld
deposits with nickel contents ranging from 7.50% to 15.00% and from
15.00% to 37%, respectively, but these A-Number classifications also
require specified concentration ranges of carbon, chromium, molybdenum,
manganese, and silicon. For a weld deposit of, e.g., 4.5% nickel, there is no
A-Number classification, and depending on the applicable essential
variables, a separate qualification may be required for such a deposit.
Question (4): What P- and A-Numbers are applicable to materials not listed
in Section IX?
Reply (4): Occasionally a material to an SA Specification that is usable
under the ASME Boiler and Pressure Vessel Code has not received a
P-Number. If this be the case, the Subcommittee on Welding should be so
informed that the weldability of material may be considered. Concerning
non-Code listed materials, it is the policy of the Boiler and Pressure Vessel
Committee to assign P-Numbers only to those materials listed in Section II
of the ASME Boiler and Pressure Vessel Code. A-Number classifications
have been developed as a convenience for the grouping of weld metaldeposits of general usage in Code construction. It is not intended that all
weld metals will be included within the A-Numbers of QW-442 and
provisions of Section IX permit qualification of other weld metals.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Retention of Qualification Specimens and Radiographs
Date Issued: 01/02/1979
Record Number: BC-78-780
Interpretation Number : IX-79-01
Question(s) and Reply(ies): Question (1): What are the retention requirements for welder qualification
test coupons that have been accepted by radiography or welder qualification
test specimens that have been accepted by bend test?
Reply (1): There are no retention requirements in the Code for either the
bend tests nor the radiographs employed in welder qualification. QW-103
states the responsibility and the record that each manufacturer or contractor
shall maintain of the results obtained and shall certify those records. These
records shall be accessible to the Authorized Inspector with recommendedform, as shown in QW-480. Any requirements beyond certification of
records are local options between the stamp holder and his Authorized
Inspector.
Question (2): What are the retention requirements for accepted radiographs
for welder qualification coupons and of welding procedure qualification?
Reply (2): The reply to the previous question covers the retention
requirements for accepted radiographs of welder qualification coupons.
Radiography of a welding procedure qualification is not a requirement nor
is it permitted as an acceptance standard for a welding procedure
qualification. Welding procedure qualifications must meet the test required
by QW-451.
ATTENTION
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The foregoing interpretation has been further considered and the following
was added as a clarification and sent to the inquirer.
Clarification of Reply (1) Issued: October 5, 1979
Reply (1): There are no retention requirements in the Code for either the
bend tests nor the radiographs employed in welder qualification. However
QW-103.2 states, "Each manufacturer, or contractor, shall maintain a recordof the results obtained in welding procedure and welder and welding
operator performance qualifications." These records shall be accessible to
the Authorized Inspector with recom-mended form, as shown in QW-480.
Any requirements beyond certification of records are local options between
the stamp holder and his Authorized Inspector.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-304 and QW-305Date Issued: 01/03/1979
Record Number: BC-78-785
Interpretation Number : IX-79-02
Question(s) and Reply(ies): Question: Are there provisions in the ASME Boiler and Pressure Vessel
Code to permit performance qualification of a welder after the production
welding has been completed?
Reply: There are no provisions in the ASME Boiler and Pressure Vessel
Code which recognize qualifi-cation of welders or welding operators after
completion of the production welding. There are provisions which permit
concurrent qualifications of welders or welding operators as provided in
Section IX, QW-304 and QW-305.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification for Small Tubing, QW-452.3
Date Issued: 01/02/1979
Record Number: BC-78-634
Interpretation Number : IX-79-03
Question(s) and Reply(ies): Question: "1-in. diameter" tubing may vary (per SA-450) between 0.968
and 1.016 in. in diameter. Under the diameter limitations in QW-452.3 is a
welder qualified on a "2-in." (nominal) pipe qualified to weld the "1-in.
diameter" tube described above?
Reply: No. QW-452.3 is based on nominal pipe sizes for specimen sizes
and for qualification limits. The "over 1" minimum qualified by the 2 in.
nominal pipe size would exclude the 1 in. diameter tubing.
Standard Designation: BPV Section IXEdition/Addenda:
Para./Fig./Table No:
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Subject Description: Section IX, Use of ASTM A296 Grade CA6NM as P-No. 6 Group 4 for
Procedure and Performance Qualification
Date Issued: 01/09/1979
Record Number: BC-78-357
Interpretation Number : IX-79-04
Question(s) and Reply(ies): Question: Is it permissible to use ASTM A-296, Grade CA6NM, in lieu of
SA-487, Class CA6NM, for welding procedure qualification testing and
performance qualification testing to be qualified per Section IX to weld
both ASTM A-296, Grade. CA6NM, and SA-487, Class CA6NM?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Voltage and Amperage Ranges for a Welding Procedure
Specification
Date Issued: 01/17/1979
Record Number: BC-78-635
Interpretation Number : IX-79-05
Question(s) and Reply(ies): Question: For Shielded Metal Arc and Gas Tungsten Arc Welding of a base
material without requirements for notch toughness, is the amperage and
voltage used for the particular diameter of electrode in procedure
qualification required to be within the range specified in the Welding
Procedure Specification?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welder Performance Qualification Materials QW-432 and QW-
442
Date Issued: 01/23/1979
Record Number: BC-78-765
Interpretation Number : IX-79-06
Question(s) and Reply(ies): Question: On a performance qualification test does a welder who qualifies
with an E-7018 rod also qualify for using E-8018-B2 or E-9018-B3L rods?
Reply: Yes. They are all listed as having an F-Number classification of 4.
Since there are no A-Number essential variables, i.e., since no restrictions
are placed on weld-metal-deposit analysis for performance in Section IX
extends throughout a single F Number. You are encouraged to review the
F-Number essential variables for performance qualifications for further
material usability.
Standard Designation: BPV Section IX
Edition/Addenda:
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Para./Fig./Table No:
Subject Description: Section IX, Slag Inclusions; Section VIII, Division 1, UW-13.2
Date Issued: 01/29/1979
Record Number: BC-78-279
Interpretation Number : IX-79-07
Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materialsof dissimilar thicknesses, such as shown in Fig. UW-13.2 of Section VIII,
Division 1, what are the procedure qualification test plate thickness
requirements for the production welds?
Reply: The thicknesses qualified are subject to the requirements of QW-451
as further governed by the requirements of QW-202.2(b). Where dissimilar
thicknesses are being joined, the thickness of the thinner member shall
govern the required thickness of the procedure qualification test plate, as
given in QW-451.
ATTENTION
The foregoing interpretation has been further considered and the following
was added as a clarification and sent to the inquirer.
Clarification of Reply Issued: June 4, 1979
Reply: The thicknesses qualified are subject to the requirements of QW-451
as further governed by the requirements of QW-202.2. You must qualify the
thickness range for both the base metal and the deposited weld metal
thickness ranges to be used in production. In addition, there are two rules in
QW-202.2 covering dissimilar thicknesses. Both rules are in the third
paragraph in Exception (1). For groove welding qualifications made on test
coupons of any thickness, there is no limit on the minimum depth ofdeposited weld metal nor on the thickness of the thinner of the base metals
being joined where they are of dissimilar thickness. Groove welding
qualifications made on test coupons 3 in. thick or more shall be applicable
for production use for base metal and deposited weld metal thickness up to
the maximum given in QW-451 except welds joining dissimilar thicknesses
of base metals in which the base metal on one side is equal to or less than
the maximum thickness qualified in the PQR, the base metal on the other
side may be of any greater thickness.
Standard Designation: BPV Section IX
Edition/Addenda:Para./Fig./Table No:
Subject Description: Section IX, QW-403.6 Diameter Restrictions
Date Issued: 02/06/1979
Record Number: BC-78-778
Interpretation Number : IX-79-08
Question(s) and Reply(ies): Question: Do the diameter restrictions of Section IX, QW-403.16 mandate
requalification of welders for fillet and socket welds in pipe 2-7/8 in.
nominal diameter and less when the welders have been qualified in large
diameter groove welds in pipe?
Reply: No.
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Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Travel Speed As An Essential Variable for Hardfacing, QW-
282.4
Date Issued: 02/21/1979
Record Number: BC-79-31
Interpretation Number : IX-79-09
Question(s) and Reply(ies): Question: For manually-controlled hardfacing procedure qualification, QW-
282.4(h) reads "A variation of more than 10% beyond the travel speed range
specified." Does this mean that the travel speed range must be specified on
the WPS?
Reply: Yes. The travel speed range must be specified and any change 10%
below the lowest speed specified and 10% above the highest speed specified
requires requalification.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Peel Tests
Date Issued: 02/20/1979
Record Number: BC-78-840
Interpretation Number : IX-79-10
Question(s) and Reply(ies): Question: When qualifying a lap joint by brazing to Section IX with brazing
filler metal of equal or greater strength than the base metals being joined,does failure in the base metal constitute passage of the peel test?
Reply: When qualifying a lap joint with a brazing filler metal of equal or
greater strength than the base metals being joined, the sectioning test of QB-
181 is used in place of the peel test of QB-170. Sectioning of the specimens
shall be as shown in QB-463.9 and acceptance standards of QB-181 shall be
met.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-303
Date Issued: 02/15/1979
Record Number: BC-79-22
Interpretation Number : IX-79-11
Question(s) and Reply(ies): Question: Is it the intent of QW-303.4 that qualification in the 6G position
shall qualify for all positions for double welds as described in that
paragraph?
Reply: Yes.
ATTENTION
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The foregoing interpretation has been further considered and the following
was added as a clarification and sent to the inquirer.
Clarification of Reply Issued: October 5, 1979
Reply: No. QW-303.4 covers 1G and 2G positions only. Refer to QW-303.1
and QW-461.7 for rules governing 6G.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Changes in Supplementary Essential Variables, QW-403.5
Date Issued: 02/26/1979
Record Number: BC-78-782; W78-185
Interpretation Number : IX-79-12
Question(s) and Reply(ies): Question: Under QW-403.5 is it permissible to change other supplementary
essential variables, i.e., position, temperature, or electrical characteristics by
welding a new test plate from which only impacts are taken?
Reply: No. The opening sentence of the second paragraph of QW-403.5
provides that all requirements be met. This means supplementary essential
as well as essential variables.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-407.1(b)
Date Issued: 02/26/1979
Record Number: BC-78-636
Interpretation Number : IX-79-13
Question(s) and Reply(ies): Question: Is it the intent of QW-407.1(b) to require the requalification of a
welding procedure when changing from one postweld heat treatment
temperature range to another postweld heat treatment temperature range
when both are below the critical range?
Reply: No. It is the intent of Section IX that the postweld heat treatment
temperature range, below the critical range, employed in the qualification ofa welding procedure specification for fabrication in accordance with a
Section of the Code shall also qualify for the required postweld heat
treatment below the critical range specified by other Sections of the Code.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Variables for Welder Performance Qualification for Hard
Facing Weld Metal Overlay, QW-312
Date Issued: 02/26/1979
Record Number: BC-78-798
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Interpretation Number : IX-79-14
Question(s) and Reply(ies): Question: Do the variables in QW-350 apply for the qualification of welders
for hard facing weld metal overlay application?
Reply: No. A welder who meets the requirements of QW-312 is qualified to
do all hard facing weld metal overlay applications using the same process.
ATTENTION
The foregoing interpretation has been further considered and the following
was added as a clarification and sent to the inquirer.
Clarification of Reply Issued: October 5, 1979
Reply: No. QW-312 covers qualification requirements for a welder for hard
facing weld metal overlay.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Revision of the Procedure Qualification Record, QW-201.2
Date Issued: 02/27/1979
Record Number: BC-79-33
Interpretation Number : IX-79-15
Question(s) and Reply(ies): Question: If a nonessential variable on a Welding Procedure Specification is
changed, must the Procedure Qualification Record supporting that Welding
Procedure Specification be changed to reflect the nonessential variable
change?
Reply: Since the Procedure Qualification Record is used to record the actual
data used in qualifying a Welding Procedure Specification, such data shall
not be revised when a nonessential variable is changed. QW-201.1 does
require, however, that a Welding Procedure Specification having undergone
a nonessential variable change must be revised or rewritten to reflect such a
change.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Deletion of a Part of a Shielded Metal-Arc Procedure, QW-253
Date Issued: 03/01/1979
Record Number: BC-78-674
Interpretation Number : IX-79-16
Question(s) and Reply(ies): Question: May a welder, qualified using a combination welding procedure
for shielded metal-arc welding on a single test coupon, specifically E6010
root and E7018 fill, weld on Code construction using the E7018 electrode
only, if the production joint employs a backing, and all other essential
variables are the same, and the welder deposits weld metal only within the
range qualified by his E7018 portion of his performance qualifications?
Reply: Yes. The thickness limit is that of the test coupon, including both
E6010 and E7018 deposited weld metals.
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Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Pipe Welding Qualification Test Coupon Thickness Definition,
QW-451, QW-452
Date Issued: 03/12/1979
Record Number: BC-79-69
Interpretation Number : IX-79-17
Question(s) and Reply(ies): Question: In QW-451 and QW-452 how are "Thickness T of Test Coupon
Welded" and "Nominal Pipe Size of Sample Weld," respectively, defined?
Reply: In both cases when standard-size pipe is used for qualification test
specimens, T is defined as the nominal wall thickness of the pipe as listed in
the applicable SA pipe specification in Section II.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Additional Test Specimens Required for Notch Toughness
Condition, QW-403.5
Date Issued: 03/19/1979
Record Number: BC-79-68
Interpretation Number : IX-79-18
Question(s) and Reply(ies): Question: If a welding procedure has already been qualified to satisfy all
requirements other than notch toughness and a new procedure is to bequalified without changing essential variables but incorporating additional
supplementary essential variables, will it be necessary to prepare an
additional test coupon using the new procedure, only to provide necessary
notch toughness specimens?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:Subject Description: Section IX, Welding Material "F" Numbers
Date Issued: 03/19/1979
Record Number: NC-79-62
Interpretation Number : IX-79-19
Question(s) and Reply(ies): Question: May welding rods, electrodes, and filler metals not meeting an
American Welding Society (AWS) Specification be assigned F-Numbers
provided they meet another specification, such as a Japan Institute of Steel
one?
Reply: No.
Standard Designation: BPV Section IX
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Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding Procedures When Essential Variables are Revised in
Subsequent Editions of Section IX
Date Issued: 03/19/1979
Record Number: BC-79-73
Interpretation Number : IX-79-20
Question(s) and Reply(ies): Question: QW-311(a) of the 1977 Edition with Winter 1977 Addenda, now
requires that at least three weld beads of overlay be used for qualification
for weld overlay cladding. Is it the intent of the Code that weld overlay
procedures qualified before the Winter 1977 Addenda which became
mandatory now must be revised in order to clad components with Code
effective dates earlier than December 31, 1977?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Sections IX and III, Weld Thickness Qualified and Postweld Heat
Treatment Requirements
Date Issued: 03/19/1979
Record Number: BC-79-101
Interpretation Number : IX-79-21
Question(s) and Reply(ies): Question (1): A shielded metal arc welding procedure is qualified using a 1
in. thick test coupon. What are the maximum plate thickness and weld depthqualified thereby?
Reply (1): The maximum plate thickness and weld depth qualified are each
2 in., as indicated by QW-451.
Question (2): Does Section IX limit the SMAW weld repair depth qualified
when no postweld heat treatment is used?
Reply (2): No.
Question (3): For a repair weld procedure qualified as described above,
what is the maximum repair, partial penetration, or fillet weld thickness ordepth that can be made without postweld heat treatment under Section III,
Subsection NE, Table NE-4622.3-1?
Reply (3): Repair, partial penetration, and fillet welds up to ¾ in. thick or
deep may be made under the conditions described above provided the base
metal is over 1½ in. thick and provided a 200°F minimum preheat is
applied.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Brazing Qualification Peel-Test Acceptance Criteria, QB-172
Date Issued: 04/25/1979
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Record Number: BC-78-221; W-78-147
Interpretation Number : IX-79-22
Question(s) and Reply(ies): Question: Is it the intent of Section IX, QB-172 that brazing qualification
peel test specimens must meet all of the acceptance criteria of QB-172
[namely, in the paragraph itself and subparagraphs (1), (2), and (3)]?
Reply: Yes. A specimen failing to meet any of the criteria is unacceptable.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding of Split Backing Rings, QW-402.2, QW-402.4
Date Issued: 04/30/1979
Record Number: BC-79-187
Interpretation Number : IX-79-23
Question(s) and Reply(ies): Question: If a welder is qualified to weld using a split backing ring, must he
be additionally qualified to weld a joint without backing to weld the gap of
a split backing ring?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Code Edition Applicable to Assigning Essential Variables to
Old Welding Procedures, Preamble
Date Issued: 04/30/1979
Record Number: BC-79-64
Interpretation Number : IX-79-24
Question(s) and Reply(ies): Question: When position was an essential variable for welding procedure
specification test, may the welding procedure specification now be revised
to include other positions without requalification?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-302.2
Date Issued: 05/11/1979
Record Number: BC-79-185
Interpretation Number : IX-79-25
Question(s) and Reply(ies): Question: To qualify a welder under QW-304 or a welder operator under
QW-305 by radiographic examination, must a 6 in. test coupon beevaluated?
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Reply: For plate, a test coupon of a minimum of 6 in. long must be
evaluated by radiographic examination to qualify a welder under QW-304
or a welder operator under QW-305. For pipe, the entire weld
circumference shall be examined. When this circumference is less than 6
in., additional coupons shall be welded to obtain 6 in. of weld length, but
not more than four samples are required. That is, four small diameter
samples may not equal the 6 in. length.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Thickness Qualified for Procedure Qualification
Date Issued: 05/10/1979
Record Number: BC-79-65
Interpretation Number : IX-79-26
Question(s) and Reply(ies): Question: Does the thickness of the base metal in a production groove weldor the thickness of the groove weld metal govern the thickness range to
which a Welding Procedure Specification shall be qualified?
Reply: For groove weld procedure qualification, QW-202.2 states that
qualification shall encompass both the base metal and the weld-metal
thickness. This also applies to partial penetration groove welds.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Thickness Qualified in Partial Penetration Weld Procedure
Qualification, QW-45l
Date Issued: 05/10/1979
Record Number: BC-79-50
Interpretation Number : IX-79-27
Question(s) and Reply(ies): Question: For procedure qualification of partial penetration welds, what
dimension is used in determining the maximum thickness qualified: the
base metal thickness, or the thickness of the weld metal (i.e., the weld
groove depth)?
Reply: For groove weld procedure qualification, QW-202.2 states thatqualification shall encompass both the base metal and the weld-metal
thickness. This also applies to partial penetration groove welds.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding Procedure Qualification Requirements for Clad Plate,
for Use in Section VIII, Division 1 Construction
Date Issued: 05/14/1979Record Number: BC-79-30
Interpretation Number : IX-79-28
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Question(s) and Reply(ies): Question: An integrally clad plate consists of a base plate of SA-515 Grade
70 which is 22 mm thick and cladded with SA-240 Type 304L which is 2
mm thick. The base plates are joined with E 7016 weld metal and the
cladding plates are joined with E 309 and E 308L weld metal. What tests
are required on this integrally clad plate to meet the requirements of Section
IX plus additional requirements of Section VIII, Division 1, UCL-40 and
-41?
Reply: 1st Condition: Thickness of cladding is included in design per UCL-
23(c). (1) Weld an integrally clad plate with the base plate being at least 11
mm thick and the clad being at least 1.6 mm thick using F-No. 4 and F-No.
5 electrodes on the respective materials. (2) Weld test plate of P-No. 1
material equal to or less than 22 mm thick by overlaying in accordance with
QW-214 and QW-281 with the appropriate desired electrodes. 2nd
Condition: Thickness of cladding is not included in design per UCL-23(c).
(3) Make (1) and (2) above or (4) and (5) below and (2) above. (4) Weld
P-No. 1 material (over 11 mm) separately with F-No. 4 electrode. (5) Weld
P-No. 8 material 1.6-9.6 mm (separately) with F-No. 5 electrode.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-410.24
Date Issued: 05/29/1979
Record Number: BC-79-215
Interpretation Number : IX-79-29
Question(s) and Reply(ies): Question: Do austenitic base metals fall under the category of ferritic base
metals, when notch toughness is required for the weld metal?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Interpretation of the Preamble and QW-100.3
Date Issued: 05/30/1979
Record Number: BC-79-219
Interpretation Number : IX-79-30
Question(s) and Reply(ies): Question (1): In the case where the mandatory qualification requirements
have been made more restrictive in Editions later than the 1962 Edition, are
Welding Procedure and Performance Qualifications that were made
according to the 1962 Edition still acceptable as a qualified Welding
Procedure Specification?
Reply (1): Yes.
Question (2): Is it mandatory that the WPS be updated to document all
essential variables required by the current edition of Section IX?
Reply (2): No.
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Question (3): In 1968 a procedure was qualified using an A-No. 4
classification of weld metal analysis. Subsequently the A-Number Table
was revised and the composition of the weld metal now place it in the
A-No. 5 classification. Since QW-404.5 indicates a change in weld metal
composition as an essential variable, is it necessary to requalify this updated
Welding Procedure Specification?
Reply (3): No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Nominal Electrode Diameter, QW-281.3 and QW-282.3
Date Issued: 05/16/1979
Record Number: BC-79-181
Interpretation Number : IX-79-31
Question(s) and Reply(ies): Question: What is the meaning of the word "nominal" as used in QW-281.3
and QW-282.3?
Reply: The word "nominal" in QW-281.3 and QW-282.3 refers to the listed
size of electrodes and electrode tolerances as a consideration; that is, 5/32
in. would be the nominal size, and tolerances permitted are not a
consideration. Another size electrode, such as 1/8 in. is not considered to be
within the tolerances of the 5/32 in. nominal size electrode under the
definition of the word "nominal."
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-403.5
Date Issued: 05/30/1979
Record Number: BC-79-225
Interpretation Number : IX-79-32
Question(s) and Reply(ies): Question: A welding procedure specification was written to weld base
metals listed under one P-Number but having different Group Numbers.
Does QW-403.5 require requalification, if the welding procedure
specification has been qualified with each of the base metals welded toitself, using the same electrode or filler metal and the same essential
variables?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Temperature Ranges for PWHT, QW-200.1 and QW-200.2
Date Issued: 06/12/1979
Record Number: BC-79-252
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Interpretation Number : IX-79-33
Question(s) and Reply(ies): Question (1): For materials where UCS-56(e)(3) of Section VIII, Division 1
permits a maximum difference of 150°F between the various parts of a
vessel being postweld heat treated, is a PWHT temperature range of 150°F a
reasonable range to be specified in the WPS?
Reply (1): Yes.
Question (2): Is it necessary that the PWHT temperature range specified in
the WPS be the same as the actual temperature range recorded for the
PWHT carried out on the test coupon of the supporting PQR?
Reply (2). No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-452, Performance Qualification Specimens
Date Issued: 06/01/1979
Record Number: BC-79-224
Interpretation Number : IX-79-34
Question(s) and Reply(ies): Question (1): What are the requirements for performance qualification when
using a transverse bend test and the thickness of the material is less than
1/16 in.?
Reply (1): QW-310.1 of Section IX provides for qualifications where the
thicknesses are less than 1/16 in.
Question (2): What is the minimum thickness qualified for a groove weld
when the nominal pipe size of the sample weld is over 2 in. and t= ¾ in.?
Reply (2): The minimum thickness qualified would be 3/16 in.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-304 and QW-305
Date Issued: 05/30/1979Record Number: BC-79-228
Interpretation Number : IX-79-35
Question(s) and Reply(ies): Question: The SAW process under consideration consists of a wire and flux
feed in a fixed position with the work being rotated on rollers by a
positioner. The wire is fed at a rate based on voltage and current
adjustments made by a worker as the weld progresses. Is a worker welding
with this equipment considered to be a welder or a welder operator?
Reply: A worker using this equipment would be a welding operator.
Standard Designation: BPV Section IX
Edition/Addenda:
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Para./Fig./Table No:
Subject Description: Section IX, Slag Inclusions
Date Issued: 06/04/1979
Record Number: BC-78-279
Interpretation Number : IX-79-36
Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materialsof dissimilar thicknesses, such as shown in Fig. UW-13.2 of Section VIII,
Division 1, what are the procedure qualification test plate thickness
requirements for the production welds?
Reply: The thicknesses qualified are subject to the requirements of QW-451
as further governed by the requirements of QW-202.2. You must qualify the
thickness range for both the base metal and the deposited weld metal
thickness ranges to be used in production. In addition, there are two rules in
QW-202.2 covering dissimilar thicknesses. Both rules are in the third
paragraph in Exception (1). For groove welding qualifications made on test
coupons of any thickness, there is no limit on the minimum depth of
deposited weld metal nor on the thickness of the thinner of the base metals being joined where they are of dissimilar thickness. Groove welding
qualifications made on test coupons 3 in. thick or more shall be applicable
for production use for base metal and deposited weld metal thickness up to
the maximum given in QW-451 except welds joining dissimilar thicknesses
of base metals in which the base metal on one side is equal to or less than
the maximum thickness qualified in the PQR, the base metal on the other
side may be of any greater thickness.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification on Split Backing Rings
Date Issued: 06/05/1979
Record Number:
Interpretation Number : IX-79-37
Question(s) and Reply(ies): Question: If a welder is qualified to weld using a split backing ring, must he
be additionally qualified to weld a joint without backing to weld the gap of
a split backing ring?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-304 and QW-305
Date Issued: 06/05/1979
Record Number: BC-79-183
Interpretation Number : IX-79-38
Question(s) and Reply(ies): Question: Please classify submerged-arc welding performed under thecontrol and observation of an individual as either semi-automatic or
machine welding.
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Reply: Semi-automatic Arc Welding is arc welding with equipment which
controls only the filler metal feed. The advance of the welding is manually
controlled. The person welding with these conditions is classified with
manual welding as welders. This normally includes GMAW, FCAW, and
SAW (hand held). Machine Welding is welding with equipment which
performs the welding operation under the constant observation and control
of a welding operator. The welding operator may adjust the height and
location of the arc but the machine advances the welding head. The personwelding with these conditions is classified with automatic welding as a
welding operator. This normally includes SAW.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-200
Date Issued: 06/07/1979
Record Number: BC-79-242Interpretation Number : IX-79-39
Question(s) and Reply(ies): Question: A material was purchased to an ASTM Specification that was not
included in the P-Number table at that time, and a PQR was then
documented using this material. In subsequent Addenda this material was
issued a P-Number. Is it permissible to qualify a procedure using the PQR
that was documented before this Addenda was issued?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Positions Qualified When QW-405.2 is an Essential Variable
Date Issued: 03/27/1979
Record Number: BC-79-63
Interpretation Number : IX-79-40
Question(s) and Reply(ies): Question: If QW-405.2 is an essential variable for procedure qualification,
does qualification in the vertical (3G) position with uphill qualification
qualify the procedure for all other positions?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX and Section III, P-Numbers for ASTM A-572, A-588, and
A-633 as Used Under Case N-71 (1644), QW-422
Date Issued: 04/11/1979
Record Number: BC-78-661
Interpretation Number : IX-79-41
Question(s) and Reply(ies):
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Question (1): Is it permissible for an Owner to assign P-Numbers to
materials in Code Cases for Section III, Division 1 construction when
considering either welding or postweld heat treatment?
Reply (1): No, only the Boiler and Pressure Vessel Committee may assign
P-Numbers to materials.
Question (2): Are ASTM materials A-588, A-572 and A-633 considered asP-No. 1 materials in Section IX?
Reply (2): No, the above materials have not been submitted for approval as
SA specifications and assignment of P-Numbers by the Committee. Upon
proper notification that these materials will be adopted as SA
Specifications, the Committee will then review these materials for the
proper assignment of P-Numbers. P-Numbers cannot be assigned in any
other manner either for welding procedures or postweld heat treatment
exemptions.
Standard Designation:BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-303.6
Date Issued: 06/18/1979
Record Number: BC-78-788
Interpretation Number : IX-79-44
Question(s) and Reply(ies): Question: Welders have been qualified in 10 in. Schedule 80 and 120 pipe
in the 6G position. Are these welders then permitted to make fillet welds in
all sizes, diameters, including, for instance, 1 in. O.D., and thicknesses
within the qualified process?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification, QW-300
Date Issued: 06/18/1979
Record Number: BC-79-263
Interpretation Number : IX-79-45
Question(s) and Reply(ies): Question: Can an organization use its welding supervisors to qualify
welders to procedures, using the tests required in Section IX "Welding and
Brazing Qualification," without utilizing the services of an outside testing
organization?
Reply: Yes.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-462.1(c) Applicability of Notes
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Date Issued: 06/19/1979
Record Number: BC-78-784
Interpretation Number : IX-79-46
Question(s) and Reply(ies): Question: Do the notes immediately beneath QW-462.1(c) relate only to
that figure or are they also applicable to QW-462.1(a) and QW-462.1(b)?
Reply: These notes are also applicable to QW-462.1(a) and (b).
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, P-Number Classification, QW-422
Date Issued: 06/20/1979
Record Number: BC-79-281
Interpretation Number : IX-79-48
Question(s) and Reply(ies): Question: If a material does not have a P-Number classification, is it still
suitable for welding in accordance with Section IX?
Reply: Section IX addresses only those materials listed in QW-422; the use
of other materials is dependent upon the discretion of the manufacturer or
contractor.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-452, Performance Qualifications of Joints Using Split
Backing Rings
Date Issued: 06/26/1979
Record Number: BC-79-308
Interpretation Number : IX-79-49
Question(s) and Reply(ies): Question: If a welder is to be qualified on a joint with a split backing ring, is
it necessary to remove a specimen from the gap of the ring to perform the
required bend tests?
Reply: No.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Preamble Introduction QW-201.3
Date Issued: 05/27/1979
Record Number: BC-79-191
Interpretation Number : IX-79-42
Question(s) and Reply(ies): Question (1): The Preamble acknowledges that procedure and performancequalifications made in accordance with recommendations of the 1962 or
later Editions of the Code are acceptable, providing they were made in
accordance with the Edition of the Code in effect at that time. May a
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procedure qualified in 1971 be rewritten to remove information which is not
listed as Essential, Supplementary Essential, or Non-essential Variables?
Reply (1): Changes may be made to Nonessential Variables of a welding
procedure specification, provided such changes are documented with
respect to both Essential and Nonessential Variables of the specified
welding process or processes, either in an amendment to the original WPS
or a new WPS without requalification.
Question (2). Must a procedure qualified after 1962 be revised to reflect
new or deleted Essential or Nonessential Variables?
Reply (2): No.
Question (3): The introduction under Article II, page xx, discusses the
elimination of diameter requirements up to 24 in. diameter pipe for
procedure qualification. Where is the 24 in. diameter required for procedure
qualification discussed in the body of Section IX?
Reply (3): The introduction is an aid to the user of Section IX. The
particular paragraphs cited relate to items which were changed from
previous Editions of the Code. Since the 24 in. diameter is no longer a
requirement for procedure qualification, there is no cause to discuss it
within the body of Section IX.
Question (4): Where a procedure qualification test coupon with a total base
metal thickness of 1 in. is to be welded using GTAW for 3/8 in., SMAW for
¼ in., and SAW for 3/8 in., in that sequence, what are the answers to the
following questions?
(4a): What is the qualification range for the GTAW process?
Reply (4a): 1/16 in. to 3/4 in.
(4b): What is the qualification range for the SMAW process?
Reply (4b): 1/16 in. to ½ in.
(4c): What is the qualification range for the SAW process?
Reply (4c). 1/16 in. to 3/4 in.
(4d): What is the qualification range for the combined process weld?
Reply (4d): 1/16 in. to 2 in., providing the individual limits for each processare observed and taken to their maximums.
(4e): Must the WPS list the qualification range for each process?
Reply (4e): Yes.
Question (5): If a welding procedure for SMAW is qualified for 1/16 in. to
1/2 in. without a backing ring and another SMAW welding procedure
specification for 3/16 in. to 2 in. with a backing ring, may the two
procedures be used to weld a 1 in. thick base material with no backing ring?
Reply (5): Yes.
Question (6): Qualification A is for the GTAW process from 0.062 in. to
0.166 in. and Qualification B is for the GTAW welding process from 0.187
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in. to 1.5 in. May a plate 0.180 in. thick be welded using one or both of
these qualifications?
Reply (6): No.
Question (7): Where a welding procedure specification is qualified using
the GTAW process for 3/16 in. of the qualification plate and the SMAW
process for 1/16 in. of the plate, may you use this welding procedurespecification to weld a 0.180 in. thick plate by the GTAW process?
Reply (7): The qualification in the question will permit the welding of a
0.180 in. thick plate by the gas tungsten arc process qualification which
covers this thickness range. Processes may be deleted from the production
joint qualified by a combination of processes or procedures.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding Performance Qualification, QW-300
Date Issued: 06/19/1979
Record Number: BC-79-272
Interpretation Number : IX-79-47
Question(s) and Reply(ies): Question: Can a welder be qualified to a process without a qualified
procedure?
Reply: No, a performance qualification test must be welded in accordance
with a Welding Procedure Specification that has been qualified by the
Manufacturer or contractor having the responsibility for conducting the test.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, QW-407.2
Date Issued: 07/09/1979
Record Number: BC-79-337
Interpretation Number : IX-79-51
Question(s) and Reply(ies): Question (1): QW-407.2 is a supplementary essential variable for allwelding processes except EBW, OFW, and stud welding. This variable
requires that the procedure qualification test be subjected to heat treatment
essentially equivalent to that encountered in the heat treatment of base
metals and in the fabrication of the vessel or vessel parts, including at least
the aggregate times at temperature(s). Does this variable apply only to
vessels for which notch toughness is a requirement?
Reply (1): Yes.
Question (2): Is a procedure qualification heat treatment time of at least
80% of the heat treatment time actually applied to the vessel considered to
be essentially equivalent to the heat treatment time of the vessel?
Reply (2): Yes.
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Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Performance Qualification Using SMAW
Date Issued: 07/19/1979
Record Number: BC-79-237
Interpretation Number : IX-79-64
Question(s) and Reply(ies): Question: There appears to be a conflict on base metal essential variables
for SMAW welder qualification between the requirements of QW-310.4
and QW-353. QW-403.16, listed under QW-353, states that a change
outside of the qualified thickness range is the only base metal essential
variable. QW-310.4 states the base metals under which the welder must be
qualified for the production weld, with some exceptions. What is to be
followed for the qualification or extending of a previous qualification on a
welder in the SMAW process?
Reply: Both paragraphs cited in the inquiry are compatible. The purpose ofthe essential variable under QW-353 is to state the limits of the qualification
as based upon thickness range. The purpose of QW-310.4 is to state the
permissible base metals which can be employed in accordance with the
electrode which is being qualified for the welder qualification.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Regarding Thickness Limitation for Performance Qualification
of Combined Processes Using a Backing Ring, QW-452.3
Date Issued: 07/26/1979
Record Number: BC-79-240
Interpretation Number : IX-79-65
Question(s) and Reply(ies): Question: A welder who satisfactorily passes a performance qualification
test using two passes with GTAW and the balance with SMAW on a 6 in.
Schedule XXH (0.864 wall) pipe is qualified for what thickness in the
combined processes per QW-452.3?
Reply: QW-452.3 was revised as published in the Summer 1979 Addenda.
This clarification states that the thickness qualified for each process isdependent on the thickness of the weld metal deposited in the performance
qualification test by that process. Where the weld metal deposited by each
process in the performance qualification test is less than 3/4 in., the
qualification limit with that process shall be twice the thickness qualified. If
the thickness of weld metal deposited with a welding process is in excess of
3/4 in., there will be an unlimited qualification in thickness.
Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: Section IX, Welding Qualification Mechanical Properties
Date Issued: 06/13/1979
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Record Number: BC-78-832
Interpretation Number : IX-79-43
Question(s) and Reply(ies): Question (1): A procedure is being written to weld 3 in. thick SA-515-70
P-No. 1 base metal in production. The base metal used for procedure
qualification is 3 in. thick SA-515-55 P-No. 1, welded with an E-7018
F-No. 4, A-No. 1 electrode. The test coupon was stress relieved for 3 hr at
1125°F. Charpy impact tests were not required. The tensile tests failed at54,800 psi in the base metal. Is this procedure acceptable per Section IX to
weld 70,000 psi min. tensile P-No. 1 material even though the tensile
specimen failed at 54,800 psi?
Reply (1) Yes, per QW-153(d), provided a proper Welding Procedure
Specification is written as described in the following questions.
Question (2): What is the intent of Section IX QW-153, QW-421, and QW-
422 with respect to mechanical properties (tensile strength) of materials
substituted for the base metal used in procedure qualification within the
same P-Number grouping?
Reply (2): The intent of QW-421 is to "reduce the number of welding
procedure qualifications required" with considerations being given as stated
in the remainder of the paragraph. In addition, QW-201 describes the
documents of "Welding Procedure Specification" (WPS) and "Procedure
Qualification Record" (PQR) both of which are required. Also, in addition,
the Welding Variables of QW-250 need be considered and documented, as
required, in both the WPS and the PQR.
Question (3): Can the tensile test acceptance criteria of QW-153 for the
base metal used in procedure qualification be applied to other base metals
within the same P-Number grouping that may be substituted for the
procedure qualification base metal in actual production?
Reply (3): Yes, provided that a WPS is written as described in QW-201.1.
Question (4): Do the words "where this can logically be done" and "does
not imply that base metals may be indiscriminately substituted for a base
metal which was used in the procedure qualification test," as stated in the
second paragraph of QW-421, mean that the procedure cited in Question (1)
qualifies for welding any and