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 624 (2003): Bicycles - Rims [TED 16: Bicycles]

IS 624:2003

W’mwi’%

wr$f%R-f@T-fmTf@w( akwytm)

Indian Standard

BICYCLES — RIMS — SPECIFICATION

( Fourth Revision)

ICS 43.150

0 BIS 2003

BUREAU OF IN DIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC

NEW DELHI 110002

October 2003 Price Group 8

Bicycles Sectional Committee, TED 16

FOREWORD

This Indian Standard (Fourth Revision) was adopted by the Bureau of Indian Standards, after the draft finalizedby the Bicycles Sectional Committee had been approved by the Transport Engineering Division Council.

This standard is one of a series of standards on bicycles and.their components.

This standard was first published in 1955 and subsequently revised in 1961 and 1991. In this revision :

a) Aluminium alloy rims have been added; and

b) Types and sizes of rims which are in prevalent use in the country have been added.

While preparing this standard, considerable assistance has been drawn from the following:

a) ISO 5775-2 ‘Bicycle tyres and rims Part 2 : Rims’ issued by the International Organization forStandardization, and

b) JIS D 9421:1997 ‘Rims for bicycles’ published by Japanese Industrial Association.

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

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 withIS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard.

IS 624:2003

Indian Standard

BICYCLES — RIMS — SPECIFICATION

( Fourth Revision)

1 SCOPE

Thi., andard specifies the dimensions and otherrequirements of bicycle rims made out of steel andalloy suitable for tyres of the same sizes, conformingtoIS2414: 1991 ‘Cycle and rickshaw pneumatic tyres— Specification (third revision)’. This standardcovers the following four profiles of the rims:

a) Beaded edge (BE) — (Earlier known asWestwood),

b) Straight side (SS) — (Earlier known asEndric),

c) Hooked bead (HE), andd) Crotchet (C).

2 REFERENCES

The following standards contain provisions, whichthrough reference in this text, constitute provisions ofthe standards. At the time of publication, the editionsindicated were valid. All standards are subject torevision and parties to agreements based on thisstandard are encouraged to investigate the possibilityof applying the most recent editions of the standardsindicated below:

1s/1s0 NO. Title

513:1994 Cold-rolled low carbon steel sheets

1068:1993

1599: 1985

1608:1995

2500 (Part 1):2000 /1S02859-1:1999

and strips (fourth revision)

Electroplated coatings of nickel pluschromium and copper plus nickelplus chromium on iron and steel(third revision)

Method for bend test (secondrevision)

Mechanical testing of metals, tensiletesting (second revision)

Sampling inspection procedures: Part1 Attribute sampling plans indexedby acceptance quality level (AQL)for lot-by lot- inspection (thirdrevision)

3 SHAPE AND DIMENSIONS

3.1 The typical profiles of various types of rims areillustrated in Fig. 1 to Fig. 4. These are for guidanceonly and are mainly intended for the design of thecorresponding rolling dies and not intended to bemeasured on the rim.

3.2 The dimensions of rims shall be as specified inTable 1 to Table 6.

3.2.1 Measurement of Circumference

The circumference of the rim is measured along thebead seat by a steel measuring tape conforming todimensions given in Table 10 (see also A-4).

3.2.2 The tolerance on steel strip thickness, used formaking rims shall be as specified in IS 513.

4 MATERIAL

4.1 Rims shall be manufactured from cold-rolledcarbon steel strips having the following physicalproperties when tested in accordance with IS 1608:

Ultimate tensile strength, Min 310 Mpa’)Yield strength, A4in 185 Mpa’)Elongation, Min 25 percent on 50 mm

4.1.1 The steel strip shall be capable of beingflattened on itself without any signs of fracture (seeIs 1599).

4.2 Aluminium rim shall be manufactured fromextruded aluminium alloy having the followingphysical properties.

Tensile strength, Min 215 N/mm*Yield strength, Min 160 N/mm*Elongation, Min 10 percentHardness, Min 70 BHNSpecific gravity, Min 2.7

rr., . . . . . ,,, ,,, ..e,, ,.,mm . . . .I nejommg pm snail nave naraness or l>u z Iu DHLA.

5 DESIGNATION

The rim shall be designated by the type, nominal widthcode, nominal rim diameter code and material name.

Example — A rim of Type BE with nominal rimdiameter 635 mm and width code 25 mm and thematerial made out of steel shall be designated asBE-635-25-Steel.

Rim made out of aluminium alloy shall be designatedas BE-635 -25-AIAlloy.

6 MANUFACTURE

6.1 The holes for spokes and valves shall beaccurately punched or drilled in accordance with thedimensions given in Fig. 5 and Table 7 to Table 9 and

‘)1 Mpa = 0.102 kgf/mm2.

1

IS 624:2003

variation in pitch of spoke hole should be within 2 mm.The valve hole shall be pierced centrally on the noseof rim and shall be at the centre of the two spoke holes.The holes shall be clear, circular and free from burrs.

6.2 The rims made of steel may be provided withdrain holes of 2.5 mm diameter on either side of thebead seat. The holes shall be located diametricallyopposite to each other that is at least two holes on eachbead and in all, not less than four holes to a rim.

6.2.1 The joint line on the tyre side and edge of spokehole, valve hole shall be free from visible burrs.

6.2.2 The position of valve hole relating to spokeholes shall be as shown in Fig. 5 when viewed fromthe tyre side.

6.2.3 The valve or spoke hole should not be punchedon the weld joining line or on the pin joining line ofthe rim in the case of the aluminium alloy rim.

6.2.4 For aluminium alloy rim the joints shall be madewith the help of the pin which has the double shearingload of 1000 kgf.

6.2.5 The closing force for the joining pin with therim shall be 1000 kgf (minimum).

6.3 The rims shall be manufactured circular in shape.The difference between any two mutuallyperpendicular inside diameters shall not exceed 6 mm.

6.4 The flatness of both the faces of the rim shall bewithin 2 mm when measured by a feeler gauge on aflat surface.

7 FINISH

The rims shall be nickel plus chrome plated and theelectroplated coatings shall conform to servicecondition No. 1 with classification code FdNi 10b Cr rof IS 1068 with provision that s nickel may besubstituted for b nickel, and mc or mp chromium maybe substituted for r-chromium. The plating on thesignificant surfaces (see Fig. 6) shall not be less thanthe minimum specified for the service condition ofIS 1068. The aluminium alloy shall be nickel pluschrome plated and the electroplated coatings shallconform to service condition No. 1 with classificationcode A1/Ni 10b Cr r with the provision that p, d or snickel; may be substituted for b nickel and mc or mpchromium may be substituted for r-chromium.

Anodizing thickness for Al-alloy rim shall be 5-10microns.

NOTE — The significant surface implies the extended surfaceof the rim after fixing the tyre.

8 SAMPLING

8.1 Unless otherwise agreed to between themanufacturer and the purchaser the procedure given inIS 2500 (Part 1)/1S0 2859-1 shall be followed. Thesingle sampling plan to be followed for eachcharacteristic shall be corresponding to the inspectionlevel and AQL as given below:

Characteristic Inspection Level AQL

Dimensions, finish S3 2.5and manufacture

Compression test S1 1.0

9 COMPRESSION TEST

9.1 Testing Machine

The test shall be conducted on any suitable device,which is capable of loading the rim in the mannerschematically indicated in Fig. 7.

9.2 Procedure

The rim shall be held between the two supportskeeping the joint at right angle to the line of loading.The load shall be gradually increased to a load of50 kg and kept for 2 min. The load shall then bereleased and the rim shall be examined. The permanentdeformation at thepoint of application of load shall be1 mm or less.

10 MARKING

10.1 The rims shall bear the rim designation, sourceof manufacture and/or trade-mark. Marking thecountry of origin on the rims is optional.

10.2 The rims may also be marked with the StandardMark.

10.2.1 The use of the Standard Mark is governed bythe provisions of the Bureau of Indian Standards Act,1986 and the Rules and Regulations made thereunder.The details of conditions under which the Iicence forthe use of the Standard Mark may be granted to themanufacturers or producers maybe obtained from theBureau of Indian Standards.

11 PACKING

Rims shall be packed in such a way that they are notdamaged during transit.

12 SYMBOLS AND DIMENSIONS

The following symbols are used in this standard:

A—

Al —

D—

Dt —

D2 —

G—

Hl —

Ll —

P—

R2 —

R3 —

R4 —

w—

B—

9

Specified rim width,Rim width at the tyre bead seat,Specified rim diameter,Measuring rim diameter,Outer diameter,Flange height,Unobstructed minimum depth above rimbase with rim tape fitted to permit tyrefitment,Well width above rim tape,Bead seat width,Flange radius,Bead seat radius,Well top radius,Measuring tape width, andBead seat angle.

L

IS 624:2003

37.5* 0.5

~s

All dimensionsin millimetres.

FIG. 1 BEADEDEDGE CROSS-SECTIONDETAILS

Table 1 Dimensions for Beaded Edge Rims(Clause 3.2 and Fig. 1)

Alldimensions in millimetres.

i

!

Type Nominal “Nominal lUm Width at Speeified Measuring Chnnferenee Number of SpokeDiameter Width Code Tyre Bead Rim Diameter Rim Diameter at BeadSeat Holes (Informative

Code Seat Al D D1 D1i 1.5 Reference)

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

305 25 25.5 304.7 304.35 956

349 25 25.5 349.2 348.85 109620

400 25 25.5 400.1 399.85 1256-20 (or) 28

BE 408 25 25.5 408.75 408.40 1293

534 25 25.5 533.5 533.15 1676

540 25 25.5 539.6 539.25 169532 (or)

559 25 25.5 558.6 558.45 1755 36 (or) 40

584 25 25.5 583.9 583.55 1834

635 25 25.5 634.7 634.35 1994

3

IS 624:2003

.- ,,\ I l– -i

I/’\

6“ ‘,*’Y

‘1?Lt

FIG. 2 STRAIGHT SIDE 121Ms

Table 2 Dimensions of Straight Side Rims(Clause 3.2 and Fig. 2)

All dimensions in millimetres.

---r c!

1REF

Type Nominal A AI G P H, 1)2) L, 4 RZ R3 R4 ~ 3)

R]m +0W]dth tl -1 * 0.5 Min Min Min Min Mar Min +5”

Code(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11) (12)

18 18 18 6.6 1.8 1.8 10 1.5 1 1.5 I@

20 20 — 6.5 2 2 11 1.8 1 1.5 10°II

Ss 22 22 — 6.5 2.2 3 11 1.8 1 2 10”

’24 24 — 7 3 3 11 2 1 2.5 10°

27 2-I — 7.5 3.5 3.5 14 2.5 1 2.5 10°

30.5 30.5 — 8 3.5 3.5 14 2.5 1 2.5 I@

) For 400 mm diameter and smaller, increase depth ffI by 1 mm) The dimcn5ion HI in conjunction with dimension .LI defines the unobstructed space above the rim base and the niPPle heads. with the

im tape fitted, to permit satisfactory tyre fitment. The actual well depth of the rim shall be defined at the discretion of rim manufacturerso achieve this objective.J For ~o}led fires with nominal rim diameter of 400 mm and smaller, B = 15° ~ 10”.

IS 624:2003

Table 3 Specified and Measuring Rim Diameters for Straight Side Rims(Clauses 3.2, A-4.2 and Fig. 2 )

All dhensions in millimetres.

Type Nominal Rim Diameter Code Specified Rim Diameter, D Measuriog Rim Diameter’), DI(1) (2) (3) (4)

Ss

194

203

222

239

248

251

279

288

298

305

317

330

.337

340

349

355

357

369

381

387

390

400

406

419

428

432

438

440

451

484

489

490

498

501

507

520

531

534

540

541

547

559

565

571

584

590

597

609

622

630

635

642

194.2

203.2

222.2

239.4

247.6

250.8

279.2

287.8

298.4

304.7

317

329.8

336.6

339.6

349.2

355

357.1

368.6

380.9

387.1

389.6

400.1

405.6

418.6

428.1

431.6

437.7

439.9

450.8

484

488.6

490.2

497.5

501.3

507.3

520.2

530.6

533.5

539.6

540.8

546.5

558.8

564.9

571

583.9

590.2

597.2

609.2

622.3

629.7

634.7

641.7

193.85

202.85

221.85

239.05

247.25

250.45

278.85

287.45

298.05

304.35

316.65

329.45

336.25

339.25

348.85

354.65

356.75

368.25

380.55

386.75

389.25

399.75

405.25

418.25

427.75

431.25

437.35

439.55

450.45

483.65

488.25

489.85

497.15

500.95

506:95

519.85

530.25

533.15

539.25

540.45

546.15

558.45

564.55

570.65

583.55

589.85

5%.85

608.85

621.95

629.35

634.35

641.35

IJ The tolerance on the memur~ bead seat circumference is [n X measuringrirodi~e~r) ~1.5mm.

5

IS 624:2003

Table 4 Dimensions of”Hooked Bead Rims(Clause 3.2 and Fig. 3)

All dimensions in millimetres.

Type Nominal Rlm Width Code A H R2 R7Min * 0.5

(1)Min

(2) ;3; (4) (5) (6)

20 20 13 2 30

HB 25 25 14 2 50

27 27 15 2 70

Table 5 Specified Rim Diameters and Circumferences for Hooked Bead Rims(Clause 3.2 and Fig. 3)

All dimensions in millimetres.

Type Nominal Rim Diameter Code Speeified Rim Diameter Specitied Rim Cfrcmnfereneem*2.5

(1) (2) (:) (4)

270 269.9 847.9

321

372

422

459

473

510

524

560

575

611

320.7

371.5

422.3

458.8

473.1

509.6

523.9

560.4

574.7

611.2

1007.5

1167.1

1326.7

1441.4

1486.3

1601

1645.9

1760.6

1805.5

1920.1

HB

Table 6 Dimensions of Crotchet Type Rims(Clause 3.2 and Fig. 4)

All dimensionsin mi]limetres.

Type Nominal Rim Width Code A K G H, Mini) ~11)

& 0.5 * 0.5 * ().5

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

13 13 1.5 5 2 0.9 *o. 1

15 15 1.5 5 2 0.9 *o. 1

16 16 1.5 5.5 2~,+o.2

-0.1

,, +0.2-0.1

,, +0.2-0.1

~l+o.2-0.1

~l+o.2“ -0.1

+ 0.2‘“’- 0.1

17 1.5 5.5 2.2c

19 19 1.5

1.5

6.5

6.5

2.5

21 21 2.5

23 23 1.5 7.5 4.5

25 25 1.5 7.5 4.5

NOTE — The specified rim diameter (D) and Measuring rim diameter (DI) are same as straight side rims (see Table 4 for details).IJDimensiOns H ~nd R define the ~jnjmum unobstructed space above the rim base and nipple heads to permit satisfacto~ tyre ‘itment ‘n

acrotchettype rim.

6

A1)

CJ

2—

L lVALVE HOLE

‘) Optionalopeningnotto exceed 1 mm.

FIG.3 HOOKED BEAD RIMS

A I

I

!)

8u.J6.2+ .3

‘)Valve hole8.3 + 0.3

0 permitted fOrwidths> 19.

1

I-.—

I

0

—

—

1

0

FIG. 4 CROTCHETRIMS

7

P

‘@M’

Rim centre

t

---Lx

All dimensions in millimetres,

FIG. 5 HOLEX FOR SPOKESAND VALVES

Table 7 Spoke Hole Details(Clause 6.1 and Fig. 5)

line

Spoke Wire Hcde, @M ‘~

(1) (2)

12 G 5

13G 4.7

14G 4.4

Table 8 Valve Hole Details(Clause 6.1 and Fig. 5)

Valve Type Diameter of Valve Hole, P t 0.1(1) (2)

Dunlop valve 8.2

Auto valve 8.7

French valve 6.3

Table 9 Position of Spoke Holes(Clause 6.1 and Fig. 5)

“Classification of Rimso

N -0.2(1) (2)

Beaded edge rim 1Straight side rim

Crotchet rim

Hooked bead rim

8

IS 624:2003

SIGNIFICANT SURFACE

.

SIGNIFICANT SURFACE

FIG. 6 SECTIONOF RIM SHOWINGSIGNIFICANT SURFACEOFELECTROPLATING

/

-

WEIGHT ‘OAo

T \ RIM SUPPORT

~ \ BASE CAPABLE OFVERTICAL ADJUSTMENT

13G.7 SCHEMATICDIAGRAM OF TESTINGMACHINE

9

IS 624:2003

ANNEX A

(Clause 3.2. 1)

METHODS FOR MEASURING AND GAUGING BICYCLE RIM DIMENSIONS

A-1 PURPOSE

This Annex gives methods for measuring and gaugingdimensions of beaded edge rims, straight side rims,hooked bead rims and crotchet type rims.

A-2 GENERAL

All measurements shall be made on rims ready for tyremounting and placed on flat surfaces. For accuratemeasurements, gauges and tapes shall always be setperpendicular to the rim flanges on both bead seats.

A-3 MAIN RIM DIMENSIONS TO BEMEASURED AND GAUGED

The main rim dimensions, which shall be measuredand gauged, are indicated in Fig. 8 to Fig. 11.

A-4 METHODS OF MEASURING SPECIFIEDDIAMETER AND BEAD SEATCIRCUMFERENCE

The first method (see A-4.1) is applicable for straightside rims and beaded edge rims. The second method(see A-4.2) is applicable for straight side and crotchettype rims.

A-4.1 First Method

The rim measurement is made around a standard levelcircumference related to the mandrel circumference.

A tape as illustrated in.Fig. 12 is used, care being takento choose an appropriate tape for the rim to bemeasured. The tape shall be made of spring steel andcontact the rim on both bead seats equally, it shall beflat, and marked with details of the rim width code andnominal rim diameter. The tape shall also be checkedon an appropriate mandrel and on a flat surface, thestraight end of the tape shall contact the other endwithin the notch (see Table 10 and Fig. 12 to Fig. 14).

It is recommended that, except for experienced riminspectors, two persons make the measurement — oneholding the tape in position and applying not more than50 N pull on the ends, and the other taking thereadings.

A-4.2 Second Method

The circumference of the upper part of both flanges ismeasured by means of an inextensible steel tape-line(10 mm width and 0.3 mm thickness, with 0.5 mmgraduations), care being taken that it contacts the rim.The two outer circumference measurements Uoa andU.b are recorded.Using an appropriate vernier gauge (see Fig. 15 andFig. 17), measure the height of both flanges at least atfour points equally spaced around the circumferencetaking care that the correct protrusion (1 mm for cyclerims) used. Calculate the average of the height for thetwo flanges, G, and Gb.

Calculate the measured circumference, Ula and Um,using the equations:

Ul~=Uo~–2nGaUlb=Uob–2~ Gb

Compare both circumferences with the product of D1values shown in Table 3 by m

NOTE — When rims have a difference of more than 2 mmbetween the two outer circumferences C&,.and Uob, the gaugeshould be appropriately applied and a spacer with a thicknessdelta, catering for the difference in circumference, inserted (seeFig. 16):

The spacer should be interposed between the top of the shorterflange and the vernier gauge as shown in Ftg. 16.

All dimensions in mi]limetres.

FIG. 8 BEADED EDGED-RIMS

10

A4

c9

\\\

i/’

/’

A.

c9

\i \\ ‘\ ,/\\ ~.

I 1’TTf

/“--. — -—-

VALVE HOLE

Lt

All dimensions in millimetres.

FIG. 9 STRAIGHT SIDERIMS

IA

+..

1REF..

All dimensions in mi]]imetres.

FIG. 10 HOOKEDBEAD RIMS

IS 624:2003

c6

J(_ A

I

-M--All dimensions in millimetres.

FIG. 11 CROTCHETTYPE RIMS

Tape

All dimensions in millimetres.

FIG. 12 RIM DIAMETERMEASUREMENT

12

Ai 1

,

w I

-+--EEEEI---- !I Tape length

All dimensions in mi]lime~s.

FIG. 13 TAPE DIMENSIONS

W+5 w+ 5 W+51

t3

v 1~

:

Ra — Surfaceroughness value at the discretion of the person checking.

All dimensions in millimetres.

FIG. 14 TAPE MANDREL

Table 10 Rim and Tape Widths(Clauses 3.2.1 and A-4.1)All dimensions in mil]ime~s.

-1

Rim Width oTape Width, W _ o ~

(1) (2) “18 1620 1822 2024 2227 2530.5 28.5

13

IS 624:2003

II

1

IIIII

II%’ I

I I

~/

/

F

1

FIG. 15 VERNIER GAUGE WITH 1/20mm GRADUATIONS

II

‘T--’t-1I

iIII

I

FIG. 16 USEOF VERNIER GAUGE WITH SPACER

14

(b) For crotchet type rims

GAUGE DETAILSFORMEASURING FLANGE HEIGHT, G

(a) -For straight

FIG.

side rims

17 VERNIER

k--lI--AL

#

-1

FIG. 19 CALLIPERVERNIERFOR MEASURINGDIMENSION,L1

FIG. 18 MEASURING PRINCIPLEOFWELL WIDTH

ABOVE RIM TAPE, LI

15

IS 624:2003

A-5 MEASURING WELL WIDTH ABOVE RIM TAPE (see Fig.18 and Fig. 19)

n .

FIG. 20 MEASURING PRINCIPLEOF BEAD SEAT ANGLE ‘B’

FIG. 21 TOOLFORMEASURINGANGLE ‘B’

A-6 MEASURING OF BEAD SEAT ANGLE ‘B’ (see Fig. 20 and Fig. 21)

16

it

IS 624:2003

A-7 MEASURING OTHER RIM DIMENSIONS rim width ‘A’ should be measured with a vernier

The rim width at the bead seat A 1,and the specified calliper as illustrated in Fig. 22.

3— - -

1

1J

L

FIG. 22 VERNIERCALLIPERFORMEASURINGRIMWIDTH

17

IS 624:2003

ANNEX B

(Foreword)

COMMITTEE COMPOSITION

Bicycles Sectional Committee, TED 16

OrgulliwlionHero Cycles Ltd, Ludhimm

Atlas Cycle Industries Ltd, Sonepat

Avel-y Cycle Industries Ltd, Chmrdigarh

Avon Cycles Ltd, Ludhiwra

Bhogai Sons (Regal), Ludhiana

Bicycle and Sewing Machines (R & D Centre), Ludhiana

Department of’Industrial Policy & Promotion, Ministry of Industry,New Delhi

Dcwan Rubber Industries Ltd. Meerut

Director of Industries, Government of Haryana, Chandigarh

Director of Industries, Government of Punjab, Chandigarh

Direc~orate General of Supply and Disposals, New DelhiEktman Industries, LudhianaExport Inspection Council of India, Kolkata

Hartex Rubber Li{mited, Hyderabad

J.K. Cycles, LudhianaKular Cycle Industries, Ludhiamr

Ministry of Defence [DGQA (V)], New Delhi

Office of the Development Commissioner, New Delhi

Ralson (India) Ltd. Ludhiana

Sadem Industries, LudhianaSuper Cycle International, LudhianaT.1. Cycles of India, Chennai

The Roadmaster Industries of India Ltd, Rajpura

United Cycle & Parts Manufacturers Association, Ludbiana

B 1S Directorate General

Representative(s)SHRIS. K. RAI (Chirrnars)

SHRIBRIIMOHANLAL (Alternate)SHRIGIRISHKAPUR

SHRIASHOKKUMAR(Alternafe)SHRIHAtLCHARANSINGH

SHRIASHWANIKUMAR(Afferrrafe)SHRIONKARSINOHPAHWA

SHRIRISHIPAHWA(Afremate)SHm HARINDER”P.BHGGAL

SHRINAG[NDERSINGHBHOGAL (Ahema?e)GENERALMANAGER

SHRISHAMSHERSINGH(Alternate)SHRI-SUSHILKUMAR

SHRt S. S. GUWA (Alternate)

SHRIVIVEK DEWANSHRIC. K. SAXENA (Alternate)

SHRIR. N. GOYAL

SHRISUNILCHOPRA(Alternate)GENERALMANAGER(R& D CENTRE)

SENIORTECHNICALOFFICER (Alternate)Stint 1. C. KHANNASHRIJAGDEEPSINGLA

SHRIRAJIV RAtZA~A

SHRIT. S. NARULA(Alfernare)SHRIK. SUBRAMANIAN

SHRIRAVtNORAPANT (Alternate)SHRIJOGINDERKUM.AR

SHRIAJIT SINGH

SHRIDARSHANStNGH (Alternate)SHRIKUK PILLAI

SHRIS. P. DEKALE (Alternate)SHRIR. L. GARG

SHRIM. B. JAYAKUMAR(Alrerrrare)SHRISANJEEV

SHRJT. R. KUKREJA (Ahemare)SHRISATISHKUMARDHANDA

SHRINAVRATTANCHOPRASHRIM. SHANMUGHAM

SHRJS. SADISHKUMAR (Alternate)SHRISUBASHGOYAL

SHRIT. R. THATAI (Affemafe)PRESIDENT

SECRETARY (Alternate)SHRIK. K. VASHISTHA,Director& Head (TED)[Representing Director General (E_@frcio)]

Member SecretaryStint J. M. KHANNA

Joint Director (TED), BIS

18

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

BIS k,as 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 ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), 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 areneeded; 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 130c : No. TED 16 (262).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : Manaksanstha

Telephones :23230131,23233375,2323 9402 (Common to all offices)

Regional Offices : Telephone

Central :

Eastern :

Northern :

Southern :

Western :

Manak Bhavan, 9 Bahadur Shah Zafar Marg

{

23237617

NEW DELHI 110002 23233841

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

{

23378499,23378561

KOLKATA 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) ~2832 9295,28327858MUMBAi 400093 128327-891,2832”7892

Branches : AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.

GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM.

Printed at Prabhat Offset Press, New Delhi-2