19
Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक !ान $ एक न’ भारत का +नम-णSatyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” प0रा1 को छोड न’ 5 तरफJawaharlal Nehru “Step Out From the Old to the New” जान1 का अ+धकार, जी1 का अ+धकारMazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” !ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह Bharthari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 9026 (2004): Rope Threaded Percussive Long-Hole Drilling Equipment [MED 21: Diamond Core and Waterwell Drilling]

IS 9026 (2004): Rope Threaded Percussive Long-Hole

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Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 9026 (2004): Rope Threaded Percussive Long-Hole DrillingEquipment [MED 21: Diamond Core and Waterwell Drilling]

ad

(m @wv

Indian Standard

ROPE THREADED PERCUSSIVE LONG-HOLEDRILLING EQUIPMENTS — SPECIFICATION

(First Revision)

ICS 73.100.30

0 BIS 2004

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

June 2004 Price Group 7

Diamond Core and Water Well Drilling Sectional Committee, ME21

FOREWORD

This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, afler the draft finalized by theDiamond Core and Water Well Drilling Sectional Committee had been approved by the Mechanical EngineeringDivision Council.

This standard was first published in 1978. The experience gained in implementation of the standard necessitated thepresent revision.

In the preparation of this standard considerable assistance has been derived from the following standards:

1S0 10207:1991 Rock drilIing equipment — Rope threaded drill steel equipment for percussive drilling,nominal sizes 22 mm to 38 mm.

1S0 10208:1991 Rock drilling equipment — Left hand rope threads,

The composition of the Committee responsible for the formulation of this standard is given in Annex A.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960‘Rules for rounding off numerical values (revised)’. The number of significant places retained in the rounded offvalue should be the same as that of the specified value in this standard

IS 9026:2004

Indian Standard

ROPE THREADED PERCUSSIVE LONG-HOLEDRILLING EQUIPMENTS — SPECIFICATION

(First Revision)

1 SCOPE

This standard covers the dimensions and requirementsfor percussive long-hole drMng equipment having ropetype threads.

2 REFERENCES

The following standards contain provisions, whichthrough reference in this text, constitute provisions of thisstandard. At the time of publication, the editions indi-cated were valid. All the standards are subject to revision.and parties to agreements based on this standard are en-couraged to investigate the possibility of applying the mostrecent editions of the standards indicated below:

1SNo. Title

4005:1967 Specification for tungsten’ carbidefor mining tools

7456:1994 Rock drill shanks and chuck bush-ing — Dimensions @rst revision)

8986:1994 Percussive drilling— Drilling steelsin bar form — Dimensions (@revision)

3 TERMINOLOGY

For the purpose of this standard,tions shall apply.

the following defmi-

3.1 Nominal Size of Rods — The rod section shall beeither round or hexagonal. The width of hexagonal rodsacross the flats is equivalent to the corresponding size ofround rod that refers to the diameter of rod incase of roundrod and to the width across the flats of hexagonal sectionof hexagonal rods.

The hexagonal rods have a larger cross-sectioned areaand contain more material for a given nominal size,

3.2 Type of Rods

3.2.1 Shank Roa!r

Drill rods with an integral shank at one end and a threadat the other end.

3.2.2 Extension Roa!r

Ordinary extension rods have the same thread dmensionat both ends. They are available in two designs, malethreads at both ends or a female thread at one end and amale thread at the other end.

3.2.3 Light &tension Rodr

On lightextension rods, the rod section (usually hexago-nal) is smaller than the thread section, which is bumpedup before the thread is turned.

IS 9026:2004

41MMENSIONS

4.1 Dimensions for Shank Rods

FORGED COLLARAS PER IS 7456

‘-----------=----=’ ~--w$’f

------+—------ -------------- --------------- - ------~-_--~ --- -_---~----~ _-

1--- I

All dimensionsin millimetres,

sl Designation Designation Nominal 1 B 1, NominalNo. of of Drill Size of 5253, to.7 ~1 size of

Component Steel’) Shank’) Thread

(1) (2) (3) (4) (5) (6) (7) (:)

i)

ii)

iii)

iv)

v)

vi)

1)2)

31

SR22H1O 22AH 22x 108 1000 16.5 71.5 22

SR25H1OL 22AH ~5xlo8 1000 20,0 80 25

SR25H1O 25AH 25x 159 1000 20.0 80 25

SR28H1OL 25AH 28.159 1000 22.8 80 28

SR28H1O 28AH 28x159 1000 22.8 80 28

SR32H1OL 32AH 32.159 1000 26.3 80 32

See IS 8986.See 4,6 of IS 7456 for dimensions of threads.Shank rods may also be supplied in lengths of 1800 mm, 2600 mmand 3400 mm.

Designation

A shank rod (SR) having nominal size of thread as 22 MMof hexagonal shape (H), length (1) = 1800 mm (18) andconforming to this standard, shall be designated as:

SR 22 H 18 IS 9026

2

4.2 Dimensions for Shank Adaptors

4.2.1 Hexagonal Shank Adaptors

FORGED COLLARAS PER IS 7456

l–––––– I

EQUIPMENT LIGHT (L)

!2JG

—---------------------—- -—- —-------- ------------- d @e

T++f~-[. . .... .. .

II

All dimensions in millimetres.

SI Designation Designation Nominal 1 B 1, “E Nominal

No. of of Drill Size of ~25 fo.7 ~1

Componentsize of

Steel 1, Shank’) ThreadG’)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

i) SA25H02L 22AH 22xlo8 255 19.4 81 26 25

ii) SA25H02B 25AH 25x108 255 19.4 81 — 25

iii) SA25H02C 25AH 25x159 255 19.4 81 — 25

1,See IS 8986.

‘j See IS 7456.

I) FOI dimensions of threads, see 4.6.

Designation

A shank adaptor (SA) having nominal size of thread as 25 mm of hexagonal shape (H), length (/)= 255 mm (02) oflight type shank 22 x 108 (L) and conforming to this standard shall be designated as:

SA 25 H 02 L IS 9026

If the shank adaptor is required with size of shank as 25 x 108 (B) or 25 x 159 (C’), the letter ‘L’ in the abovedesignation shall be replaced by the letter ‘B’ or ‘C’, as appropriate.

3

IS 9026:2004

4.2.2 Round (Lug Shank Type) Shank Adaptors

At--

30;30”

0J1.75-; .2Y

00 .32-1.4 ~G

~. fi_r-l. -.__________-’ ___________~--—_—-—_ -

--L - f --- —----------— -— - -—- —-

!.__.. ,& 1

R R

‘Yr_.___97..6 z 0.7 . ..... .. . . U?.:: IIr= -

210 rein!)

20.5-? -.———

T1

T Iz!!l.—

.’

. ,/

040-? ‘ ,’

L ,/——

-SECTION AA

~-- — 380 ? 1-–----4

A1-

AII dimensions in millimetres.

Flushing TubeSI Designation Nominal B 11 RNo. of Size of ~o.7 ~1 Max Outside Entry

Component Thread ‘~ Dia LengthG ● 0,1 Max

(1) (2) (3) (4) (5) (6) (7) (8)

,) SA25R03 25 19.4 81 4 10 82.5

II) SA28R03 28 21.5 81 4 10 82.5

Ill) SA32R03 32 25.6 81 4 10 82.5

II This refers to the length for whichdiameter is 3~~ 4m’

ZISee 4.6 for dimensions of threads. “

Designation

A shank adaptor (SA) having nominal size of thread as 32 mm of round shape (R), length (/)= 380 mm (03) andconforming to this standard, shall be designated as:

SA 32 R 03 IS 9026

4

4.3 Dimensions for Extension Rods

4.3.1 Hexagonal Extension Rods

A1- 1

.—. — - -—-— .-------------

At-

—- W

I* - SECTION AAEQUIPMENT LIGHT (L)

uiG

~

-—- —---------- ---- -(ZB

fE It t

4 -

All dimensions in millimetres.

SI Designation Designation Nominal B E 1 Tolerance on 11

No. of of Drill Size of *().7 A4tn 1 ~1

Component Steel Thread1)

s G2)

(1) (2) (3) (4) (5) (6) (7) (8) (9)

O ER22H08 22AH 22 16.5 —

ii) ER22H16 22AH 22 16.5 .

iii) ER22H24 22AH 22 16.5 —

iv) ER22H32 22AH 22 16.5 —

v) ER25H09L 22AH 25 19.4 26

vi) ER25H12L 22AH 25 19.4 26

vii) ER25H18L 22AH 25 19,4 26

viii) ER25H24L 22AH 25 19.4 26

ix) ER25H09 25AH 25 19.4 —

x) ER25H12 25AH 25 19.4 —

xi) ER25HIS 25AH 25 19.4 —

xii) ER25H24 25AH 25 19.4 —

xiii) ER28H12L 25AH 28 25,6 28

xiv) ER28H18 25AH 28 25.6 28

xv) ER32H12 25AH 32 25.6 32

xvi) ER28H09L 25AH 32 25.6 32

xvii) ER32H12L 25AH 32 25.6 32

xviii) ER32H15L 25AH 32 25.6 32

xix) ER32H18L 25AH 32 25,6 32

xx) ER32H24L 25AH 32 25.6 32

‘)See IS 8986.zJSee 4.6 fOr dimensions of threads.

800

1600

2400

3200

915

1220

1830

2435

915

1220

2435

2435

1220

1830

1220

915

1220

1525

1830

2435

Designation

An extension rod (ER) having nominal size of thread as 25 mm of hexagonal shape (H), length (/) = 1220 mm (12)and conforming to this standard, shall be designated as:

ER 25 H 12 IS 9026

If the shank rod required is of ‘light type’ the letter ‘L’ shall be added at the end of the designation.

5

IS 9026:2004

4.3.2 Round Extension Rot&

A1- uJfG

+..—. — .

-:*

+

II1

A1-

& ‘J%

I4 m SECTION AA

xt-

R15 _Fmin.

! )

1-—----——-——--

t—-—-—-—-—-—-——————.——————x1- SECTION XX

All dimensions in millimctrcs.

SI Designation Designation Nominal B I f, F NNo. of of Drill SIX of *0.7 10 ~1 M&n o

Component Steel’) Thread*) -0.4

D G

(1) (2) (3) (4) (5) (6) (7) (8) (9)

Oii)

iii)

iv)

v)

vi)

vii)

viii)

ix)

x)

xi)

ER32R09

ER32R12

ER32R18

ER32R24

ER32R30

ER38R30

ER38R36

ER45R30

ER45R36

ER50R30

ER50R30

32R

32R

32R

32R

32R

38R

38R

45R

45R

50R

50R

32

32

32

32

32

38

38

45

45

50

50

25.6

25.6

25.6

25.6

25.6

31.4

31.4

37.4

37.4

41.5

41,5

915

1220

1830

2435

3050

3050

3650

3050

3660

3050

6095

81

81

81

81

81

92

92

102

102

102

102

15

15

15

15

15

20

20

25

25

35

35

25.6

25.6

25.6

25.6

25.6

32.3

32.3

38;6

38.6

45.4

4s.4

‘) See IS 8986.Z)See 4.6 for dimensl~n~of ~~~s.

Designation

An extension rod (ER) having nominal size of thread as 32 mm of round shape (R), length (/) = 1830 mm (18) andconforming to this standard, shall be designated as:

ER 32R H 18 IS 9026

6

IS 9026:2004

4.4 Dimensions for Coupling Sleeves

ROUND OR CHAMfERfD

i{

.— - —.— -—- —- - @G $0

c

I

All dimensions in millimetres.

SI Designation of Nominal Size of D 1No. Component Thread ‘) Max o

G -1

(.1) (2) (3) (4) (5)

O CS22 22 32 140

ii) CS25 25 .37 160

iii) CS32 32 45 160

iv) CS38 38 56 180

v) CS45 4s 67 200

vi) CS50 50 78 200

1,&e 4.6 for dimensions of threads.

Designation

A coupling sleeve (CS) having nominal size of thread as 25 mm and conforming to this standard, shall be designatedas:

CS 25 IS 9026

7

IS 9026:2004

4.5 Dimensions of Drill Bits

r 001

Hil,,,1

II

1!IllII,,

11 ~,~11II11,1l!,II

($B

..-._@

CHISEL DESIGN (C)

/

ROUND ORCHAMFERED

r 0 D *

-4----@G

FOUR WING BIT, CROSS DESIGN (CR)FOR 22rnm SIZE

K max. = D-5mm

II I It

ROUND ORCHAMFERED

+@ G+-

4ill!!PFOUR WING BIT, CROSS DESIGN (CR) FOUR WING BIT, X–DESIGN (X)

fOR 25 AND 32 mm SIZE

8

IS 9026:2004

All dimensions in millimetres,

SI Designation of Nominal B D Tolerance on 1 INo. Component Size of io.7 D Max J

Thread’ J

(1) (2) (:) (4) (5) (6) (7) (8)

O

ii)

iii)

iv)

v)

vi)

vii)

viii)

ix)

x)

xi)

xii)

xiii)

xiv)

xv)

xvi)

xvii)

xviii)

xix)

xx)

xxi)

DB22C36 22 16.5

D1322C38 22 16.5

DB22C41 22 16.5

DB22CR35 22 16.5

DB22CR38 22 16.5

DB22CR41 22 16.5

DB25CR41 25 —

DB25CR45 25 —

DB25CR50 25 —

DB32CR48 32 —

DB32CR50 32 —

DB32CR57 32 —

DB32CR64 32 —

DB38X64 38 —

DB38X70 38 —

DB38X75 38 —

DB38X90 38 —

DB45XIO0 45 —

DB50X90 50 —

DB45X1OO 50 —

DB50X115 50 —

!) See4.6fOr dimensions Oftireads.

36

38

41

34.92

38.10

41.28

41,28

44.45

50.80

47.62

50.80

57,15

63.50

63.50

69.85

76.20

88.90

101.60

88.90

101,60

114.30

+().3-0.1+0.3-0.1+0.3-0,1+0.3

o+0.3

o+0.3

o+0.3

o+0.3

o+0.3

o+0.3

o+0.3

o+0,3

o+(3.3

o+0.6

o+0.6

o+0.6

o+0,6

o+1,0

o+o.6

o+0,6

o+1,0

80

80

80

80

80

80

80

90

90

90

90

100

100

100

100

71.5

71.5

71.5

71.5

71.5

71.5

Designation

A drill bit (DB) having nominaI size of thread as 22 mm of chisel design (C), diameter, D = 36 mm and conformingto this standard, shall be designated as:

DB 22 C 36 IS 9026

If the drill bit is required with cross design (CR) or X-design (X), the letter ‘C’ in the above designation shall bereplaced by the letter ‘CR’ or ‘X’, as appropriate.

9

IS 9026:2004

4.6 Dimensions of Threads

1- ‘ -----J

All dimensions in millimetres.

SI Nominal Internal Threads External ThreadsNo. Size of

Pitch- — - - — 9 P

Thread D H R, ~ 0.4 R2# 0.4 d Tolerance h r rl ~ 0,4

+0.;5 +oj on +0.’2 0.’4

(1) (2) ($ (4) (5) (6) (7) (:) (:) (lo) (11) (12)

O 22 18.86 1,5 5.5 6 21.84 0 1.5 5.5 6 12.7-0,15

il) 25 21.76 1.5 5.5 6 24.74 0 1.5 5.5 6 12.7-0.15

iii) 32 28.36 1,5 5.5 6 31.34 0 1,5 5.5 “6 12.7-0.15

Iv) 38 35.01 1.5 5.5 6 37.99 0 1.5 5,5 6 12,7-0.20

v) 45 40.71 1.9 4.3 5.2 44.49 0 1,9 4,3 5.2 12.7-0.20

vi) 50 47.01 1.5 5.5 6 49.99 0 1.5 5.5 6 12.7

4.20

10

5 CORRELATION OF COMPONENTS

Correlation of components shall be as given in Table 1.

Table 1 Correlation of Components(Clause 5)\—.....-. -/

t32 38

38R

45

45RFDesignation of drill steel in bar form

22

22AH

25

22AH

50

50R—

25AH 25.4H 32R

SR22H1O

SR22H18

SR22H26

SR22H34

.————

SA25H02B

SA25H02C

SA25R03

ER25H09

ER25H12

ER25H18

ER25H24

.

— —

SA25H02L ——

SA32R03 SA32R03 — —

—.

——

SA25R03

ER25H09L

ER25H12L—

ER25H18L

ER25H24L—

.

lDesignation of extension rods ER22H08

ER32H09L

ER32H12L

ER32H15L

ER32R18L

ER32H24L—

ER52R09

ER32R12—

—.

ER32R18

ER32R24

ER32R30

—ER38R30

ER38R36

——

ER50R3(

ER50R6(

CS50—

DB50X9(

DB50XI0

DB50x I i

ER22H16.

ER22H24

ER45R30

ER22H32

ER45R36

CS45Designation of coupling sleevesDesignation of drill bits

CS22DB22C36

DB22CR35DB22C38

DB22CR38

DB22C41DB22CR4 1

CS25 CS25 CS32 CS32 CS38

——

DB25CR41

DB25CR45—

DB25CR50

J

.

—DB25CR41

DB25CR45—

DB25CR50

————

—DB32CR48DB32CR50DB32CR57

DB32CR64—

——————

—DB32CR48DB32CR50DB32CR57

DB32CR64—

DB38X64

DB38X70

DB38X75

DB38X90—

———

——

—— —

DB45X1OO

lS 9026:2004

6 MATERIAL 7.4 The tips of the bits shall be free from pitting.

6.1 The rods and coupling sleeves shall be manufactured

from any high quality, high resistance to fatigue torsion,wear and impact resistant steel. The material used shallbe at the option of manufacturer who shall provide itscomposition if so desired by the purchaser. The shankshall be surface hardened.

6.2 The tips shall be manufactured from tungstencarbide conforming to Grade T or XT of IS 4005.

6.3 Carbon Content

Shank rod shall have high carbon content while exten-sion rods and couplings shall have low carbon content.They are hardened by high frequency surface hardeningor by carburization.

7 GENERAL REQUIREMENTS

7,1 Straightness

The rods shall be in a straight condition such thatwhen the body only is laid on a flat surface and rotated,no point on the line of contact is more than 3 mm abovethe surface for lengths up to 2 m and prorata for lengthsabove 2 m.

7.2 The threads of the drill rods shall be concentric withthe body.

7.3 The rods and the couplings shall be free from unduesurface decarburization, cracks and other defects.

7.5 The centre hole and threads of the components shallbe adequately protected against choking, erosion anddamage during transit and/or storage.

8 MARKING

8.1 Every component of the percussive long-hole drill-ing equipment shall be marked with the following:

a) Thread size;b) Shape and length of component;c) Bit gauge, if applicable; andd) Manufacturer’s name or trade-mark, month and

year of manufacture and type of steel shall beembossed at the collar of the shank.

NOTE — Instead of (a) to (c) the designation as specified in

the dimensional tables may be marked.

8.2 BIS Certification Marking

8.2.1 The rope threaded percussive long-hole drillingequipment may also be-marked with the Standard Mark.

8.2.2 The use of the Standard Mark is governed by theprovisions of the Bureau of Indian Standards Act, 1986

and the Rules and Regulations made thereunder. Thedetails of conditions under which a licence for the use ofthe Standard Mark may be granted to the manufacturersor producers maybe obtained from the Bureau of IndianStandards.

12

IS 9026:2004

ANNEX A(Foreword)

COMMITTEE COMPOSITION

Diatnond Core and Water Well Drilling Sectional Committee, ME 21

Orguniz;:ion

Geological Survey of IndiA Kolkata

Atlas Copco (India) Ltd, Ptme

Atomic Mkerstls Directorate for Exploration and Research,Hyderabad

Cen@rdGmsnd Water Board, Frsridabad

GreavesLimited, Murnbai

lndian Pump ManufacturersAssociation, Mumbai

Indian Schoolof Mines, Dhanbad

lngersoli-Rand(India) Ltd, Bssngalore

JohnsonsScreens(lndia) Ltd, Ahmedabad

Kishore Vadilal Pvt Limited, Ahmedabad

Korcs(lndia) Ltd, New Delhi

MinersdExploration Corporation Ltd, Nagpur

Mines and Geological Department, Udaipur

Public Health EngineeringDepartment Government of M. P., Bhopal

Rockdrill (India), Jodhpur

The Singareni Collieries Co Ltd, Kot.hsgudem

The SouthernIndia Engineering Manufacturers Association,Coimbatore

Wldia (India) Ltd, Bangslore

91S Directorate General

Representative(s)

SIVUR. .%mDASWASAN(Chairman)

SHSUV.K.KANSAL(hlternate)

SHRIS.DAnA MNUMDAR

SHIUo. P. SAHU

SHRIA. B. thAND (Alternate)

SHIUC. P. GAWRISHruAsHrsHCriAKRAvornY(Aflernate)

SHSID. SWAMINATHAN

SHSSC. W.GoDaoLe(Alternate)

SHSIS. B. PATILSsrrGS. L. AISHVANXAR(Alternate)

Sssru.C. K. JAIN

SHRIp. SURSSHRAO

SmuV. VENXAmSAN(Alternate)

.%-mDHASMESHMASISRU

SHP.IS. K. pARSXH

StnuK. V. PASUXH(Alternate)

MN V. GUPTASsiRIP. R. AriAL(Alternate)

SmUNINAN00MMEN

SHSUS. DHAR(Alternate)

SIN HIMMATS. BOSDIA

SHRIM. Srnms CHAUHAN(Alternate)

SHRIRAM.KANTDUSE

SHFUSACHIDANANDMISHRA(A/terrsate)

.%uu M. K. GUPTA

SW K. K. GUPTA(Alternate)

SHRSY. NARAYANAMUXTHV

SHSUV. NAGESWARA RAO (Alternate)

Sr-uUG. tiENDRAN

SHRIR. R. JAGANNATHAN (Alternate)

SW S.v. %4SANT

SHSUN. BHASXARREDDY (Alternate)

SHRIM. L. CHOPRA,Director and Head (MED)

[Representing Director General (Ex-oficio)]

Member Secretary

SHSIP. VENXATESWARARAO

Joint Director (MED), BIS

13

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standard Act, 1986 to promote harmoniousdevelopment of the activities of standardization, marking and quality certification of goods and attending toconnected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course of implementingthe standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright be addressed to the Director (Publication), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes are .

needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian -Standard has been developed from Dot: No. ME 21 (0658).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDSHeadquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams: ManaksansthaTelephones: 23230131,23233375,2323 9402 (Common to all offices)

Regional Offices: Telephone

Central :

Eastern :

Northern :

Southern :

Western :

Branches :

Manak Bhavan, 9 Bahadur Shah Zafar Marg{

23237617NEW DELHI 110002 23233841

1/14 C.I.T. Scheme VII M, V.I.P. Road, Kankurgachi{

23378499,23378561KOLKATA 700054 23378626,23379120

SCO 335-336, Sector 34-A, CHANDIGARH 160022{

603843609285

C.I.T. Campus, IV Cross Road, CHENNAI 600113{

22541216,2254144222542519,22542315

Manakalaya, E9 MIDC, Marol, Andheri (East){

28329295,28327858MUMBAI 400093 28327891,28327892

AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. GUWAHATL HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM.

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