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है”ह”ह

IS 15524 (2004): Automotive vehicles - Retreading of tyresby the pre-cured process [TED 7: Automotive Tyres, Tubesand Rims]

IS 15524:2004

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Indian Standard

AUTOMOTIVE VEHICLES — RETREADING OFTYRES BY THE PRE-CURED PROCESS —

SPECIFICATION

ICS 83.160.10

0 BIS 2004

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

NEW DELHI 110002

November 2004 Price Group 4

Automotive Tyres, Tubes and Rims Sectional Committee, TED 7

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the AutomotiveTyres, Tubes and Rims Sectional Committee had been approved by the Transport Engineering Division Council,

In this standard S1 units have been used, the unit of force in Newton(N), of tyre load in kilogram (kg) and ofpressure in pascal (Pa). Their relationships are given below for information:

1 kgf = 9.80665 N ( exactly )= 9.81 N ( approximately)= 10 N ( within 2 percent error )

1 kPa = 0.01 kgf/cm2 ( within 2 percent error)1 kgf/cm2 = 98.066 kpa.

NOTE — Values of kPa rounded to the nearest practical unit.

The composition of the Committee responsible for 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.

b

IS 15524:2004

Indian Standard

AUTOMOTIVE VEHICLES — RETREADING OFTYRES BY THE PRE-CURED

SPECIFICATIONPROCESS —

1 SCOPE

This standard covers the retreading of tyres, by thepre-cured tread process, for passenger cars,light-trucks, trucks and buses, lays down requirementsfor the casings, the methods of retreading, and theequipment to be used, as well as for the finishedproduct.

2 REFERENCES

The following standards contain provisions whichthrough reference in this text, constitute provisions ofthis standard. 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:

IS No.

3400

(Part 1) :1987

(Part 2): 1995

(Part 4): 1987

(Part 9): 1987

(Part 17) :1974

(Part 22) :1984

4910 (Part 2) :1989

13531:1992

Title

Methods of test for vulcanizedrubber.

Tensile stress strain properties(second revision)

Hardness (second revision)

Accelerated ageing (secondrevision)

Density (second revision)

Tear strength — Angular test piece

Chemical analysis

Tyre yarns, cords and tyre cordwarpsheets made from man-madefibres—Method of test: Part 2Liner density (first revision)

Automotive tyres — Tread rubber— Mould cure retreading

3 DEFINITIONS

3.1 For the purpose of this standard the definitionsgiven in IS 13531 shall apply, in addition to thefollowing:

3.1.1 Buzz-Out

The buffed area resulting from rasping (buzzing-out)of a spot injury during its preparation for repair.

3.1.2 Pre-cured Tread Process

A method of retreading tyres in which a vulcanizedrubber tread is bonded to the buffed casing by meansof a layer of unvulcanized rubber bonding material thatis subsequently vulcanized by the application of heatand pressure.

4 REQUIREMENTS

4.1 Material

Tread rubber and other material used in the retreadingof tyres by the pre-cured tread process shall complywith the requirements given in Annex A.

NOTE — As material supplied by different manufacturers arenot necessarily interchangeable, the advice of the suppliers ofthe materials concerned must be sought before materials areinterchanged.

4.2 Casings

Casings taken up for retreading shall be classified inaccordance with IS 13531.

4.3 Freedom from Defects

When examined in accordance with 8.1, each casingaccepted for retreading shall comply with thefollowing requirements:

a) Outer surface shall be free from signs of aging,

b)

c)

side-wall cracking (other than superficialweather-checking), damage caused by chemi-cals, oil water, or heat and looseness of thebreaker edge.Inner surface shall be free from damage cords,loose cords and other evidence of under-infla-tion or run-flat.Steel bead wires shall show no sign of damage,break, or undue distortion and shall not be ex-posed.Casing shall be dry, and shall be free from anyd)sign o; inherent carcass defects and permanentirregular deformation.

e) Tread shall be free from separation that cannotbe removed by buffing.

1

H3 15524:2004

f) Number and extent of permissible (determinedin accordance with defects shall not exceed acombination of the appropriate maximum givenin IS 13531).

The ?.hrough cut shall not exceed the followinglimits:

The number of through

1) Crown area cuts shall not exceed 3

2) Shoulder/ side patches and shall notwall overlap.

g) In the case of steel-reinforced casings, the rein-forcement shall be free from rust.

h) ‘ryres shall not have huge through cuts andbreaks that are beyond repairs.

5 REQUIREMENTS FOR THE RETREADINGPROCESS

S.1 Method of Retreading

Casings shall be retreaded by an approved pre-curedprocess that is in accordance with the applicableprocedures given in 5.5,5.6 and 5.7.

5.2 Individual Records

The following details of each casing shall bedetermined and recorded during processing and thisrecord shall accompany the casing throughout thewhole retreading process:

a) Buffed circumference, buffed width, buffedradius;

b) Rim width when relevant;c) Bag or envelope in which vulcanization is to

take place when relevant; andd) Number of repairs required.

5.3 Repairs

Perrni ssible defects (as in the specification for mouldcure tyre retreading) shall be repaired in accordancewith the specification for repairs. All buffing dust shall

be removed in such a manner as to preventcontamination of the buffed surface. Casings repairedand cured after buffing shall be rebuffed prior tofurlher processing.

5.4 Buffing

5.4,1 Location

The buffing operation shall be carried out in a separatebay or room, that is so constructed and isolated that nobuffing dust can spread to other parts of the factory.

5.4.2 Process

5.%2.1 Buffing shall be carried out by means of a

motor-driven buffing machine. The buffed contourshall be that as recommended by the pre-cured treadmtinufacturer and shall be achieved by means of atemplate, or adjustable radius settings. The buffed area

on a casing shall be limited to that area which is to becovered by the pre-cured tread and shoulders shall beof equal circumference. As far as possible shouldersshall not be trimmed to match the pre-cured tread andshall be restricted to the extent recommended by thetyre manufacturer. In any case, excessive trimmingresults in the exposer of any carcass plies or breakerplies is not permissible. The buff width shall not bewider than the width of pre-cured tread used by 5 mm.

5.4.2.2 The buffed surface shall be uniform, free fromparticles of loose rubber, foreign objects, moisturefurrows, channels and loose plies or breakers and fromburn or scroch marks caused during buffing and shallhave a smooth finish. The recommended buffed

“texture is RMA-3.

5.4.2.3 A casing with a shoulder design thatincorporating deep scallops shall be so prepared as toprovide a firm foundation and support for thepre-cured tread. The alternative and preferred methodshould be to use a tread design that matches theoriginal design.

5.4.3 Inspection

After buffing, each casing shall be inspected (greatcare being taken to ensure that the buffed surface doesnot become contaminated) to ensure compliance withthe classification and dimensional requirements andfreedom from the following:

a) Looseness of breaker edge,b) Contamination of the buffed surface,c) Injuries not detectable or detected before buff-

ing,d) Damage or injuries caused by buffing (see

5.4.2),e) Any other defects (see 4.2.1), andf) Embedded foreign objects.

Embedded foreign objects shall be removed and allsutface cuts and permissible defects shall be buzzedout to firm material before final inspection andauthorization of further processing.

5.4.4 Transportation and Storage

Buffed surface shall be protected from contamination,and shall be transported preferably on trolleysavoiding direct contact with the floor and stored inclean areas reserved specifically for such casing. Abuffed surface that becomes contaminated shall bere-buffed before further processing of the casing.

5.5 Cementing

5.5.1 Location and Equipment

Cementing shall be carried out in a well-ventilatedroom or bay, and both the roornhay and the equipmentshall be kept clean and free from dust. If the cement isnot compatible with cements used in the other

?

processes, it shall beappliedbymeans of an equipmentreserved specifically for the process and after theadvise of the suppliers of material.

5.5.2 Application

The cement shall be applied to the buffed surface of acasing as soon as possible after buffing, and in all caseswithin 12 h of the completion of buffing. A buffedcasing left uncemented for more than 12 h shall bere-buffed before further processing so as to removeany oxidation or contamination. In the case of exposedsteel cord reinforcement, the steel cord shall becemented within 15 min of the completion of thereparation of the cord.

5.5.2.1 The cement shall be thoroughly mixed beforeuse, and shall be applied by the method specified byits supplier and so as to ensure uniform coverage overthe entire buffed area. If it is to be applied by meansof an air-operated spray gun, the air must becompletely dry and oil-free. If required the cementmay be diluted with SBP spirit or equivalent/solvent.Contaminated petrol shall not be used for diluting.When applied by a brush, a stippling action used andcare shall be taken to ensure that the brush does notcome into contact with unbuffed surface of the casingor any other contaminated surface.

5.5.2.2 The cement surface shall be checked to ensurefreedom from buffing dust, and then allowed to dry (inciean areas reserved specifically for such casings) forthe length of time specified by the supplier of thecement. Weaving shou!d be avoided.

5.5.3 Transportation artd Storage

Cemented surfaces shall be protected fromcontamination, and shall be transported clear of thefloor and stored in clean areas reserved specifically forsuch casings. If a casing with cemented surfacesbecomes contaminated, the contamination shall beremoved and the surface shall be re-cemented beforefurther processing.

5.6 Building and Trend Application

5.6.1 General

A cemented casing shall be built up within the timelimit specified by the supplier of the cement. Acemented casing that is not built up with this period,shall be re-cemented before further processing. Thecemented surface shall not be handled during thebuilding and tread application. All processing shall becarried out in a clean area reserved specifically forthese purposes.

5.6.2 Filling

All buzz-outs shall be filled with a suitable rubbermaterial so stitched as to prevent the entrapment of air,

IS 15524:2004

and the material then trimmed flush and level with thecontour of the buffed surface. When necessary, deepscallops in a shoulder shall be built up (with suitablematerial) as to provide a firm base for the pre-curedtread, and then so stitched as to prevent the entrapmentof air.

5.6.3 Bonding Material

The bonding material shall be compatible with thetread rubber used, have a width not less than that ofthe tread rubber and shall be in sheet form, completelyprotected by a suitable backing film.

5.6.4 Tread Rubber

The tread rubber (see 4.1) shall be in the form of apre-cured strip, of the appropriate dimensionsspecified in, and having the appropriate trt~ad design(see 6.3) moulded in the surface of the pre-cured tread(or when relevant, of the attached bonding strip) to bebonded to the prepared casing. It shall be clean andshall be treated as specified by its manufacturer.

5.6.5 Application

When bonding material of the type given in 5.6.3 isused, one of the following procedures shall be used tosecure it to pre-cured tread rubber and the casing.

a) Tread rubber shall be laid, tread down, on a cleantable, any protective film removed and cementapplied to the whole area of the cleaned uppersurface. If a brush is used to apply the cement,the brush shall be cleaned. The cement shall beallowed to dry for the period specified by itsmanufacturer. If the tread belts are supplied withthe cement already applied, then the tack of thesurface shall be checked as per the specificationof the tread manufacturer. In case of insufficienttack, a fresh cement recommended by themanufacturer shall be applied evenly to thewhole area of the tread rubber. The cementedtread shall be allowed to dry thoroughly. In casemore than one piece of tread rubber has to beapplied to the tyre, then all ends shall be cutsquare and buffed cleaned. However, there shallbe cut square and buffed cleaned. However,there shall be no more than 2 pieces with theshorter piece being at least 300 mm in length.The bonding material shall be applied directlyto the casing without removing the protectivefilm. No more than one layer of bondingmaterial shall be applied to the casing and theover lap at the joint shall not be more than 5 mm.The bonding material alongwith the protectivefilm shall b; stitched onwith low pressure (aboutas given in 5.6.6.

a-mechanic~l builder1.4 kg/cm2 or 20 psi)

3

IS 15524:2004

b) Bonding material and precured tread rubbershall be measured and using a tool that providesclean cuts, cut to the required length on a cleantable reserved specifically for the purpose. Thetread rubber shall consist of not more than twopieces. The length of the shorter piece being atleast tread rubber shall be laid, tread down, onthe clean table and any protective film removed,and cement applied to the whole area of thecleaned upper surface. If a brush is used to applythe cement, the brusil shall be clean. The cementshall be allowed to dry for the period specifiedby its manufacturer.

The exposed surface of the bonding materialshall be so fitted as to cover the whole of thecement treated surface of the pre-cured tread andthe two components stitched together (avoidingthe entrapment of air) with the use of a set ofclean rollers and care being taken to avoid con-tamination. Excess bonding material shall betrimmed off. Protective films shall not beremoved until absolutely necessary and no cleansurface shall be allowed to become con-taminated in any way.

The new rubber shall be so applied as to ensurean even tension around the entire circumferenceof the tyre. After its application, enough pres-sure shall be applied to the surface of the pre-cured tread rubber (commending at the centre)to cause adhesion of the bonding gum to thecemented surface, but not sufficient to cause thenew rubber to crawl or to bunch up ahead of thestitching roller. Joints (splices) shall be lined upand secured. Care shall be taken to avoid dis-placement. The bonding material shall stretchon the mechanical builder with sufficient pres-sure.

5.6.6 The application of the tread rubber treated asper 5.6.5 shail be carried out by means of a motordriven air inflated machine. Stitching of the bondingmaterial and the tread rubber to the casing shall bedone by positive methods like mechanical, pneumaticor hydraulic actuators.

In the case of application as given in 5.6.5 (a), theexcess tread rubber shall be cut square and buffedclean. The tread shall not be cut too short or too longbut cut in such a manner that there is no residual stressat the splice.

5.6.7 Transportation and Storage

Built up casings shall not be exposed to elevatedtemperature and case shall be taken to preventcontamination of the tread areas and to preventdistortion or displacement (or both) of the new rubberduring storage and transportation.

5.7 Vulcanization

5.7.1 The vulcanization of the built up casing shall bedone only with the use of flexible rubber envelopes.The envelopes shall be either of the type which issealed with a tyre at the shoulder (half skirt) or atthe bead (full skirt). The tyres shall be wicked toremove any trapped air between the casings and theenvelope by a method recommended by themanufacturer. The casing shall be vulcanized eitherinflated or uninflated but in any case, in a relaxed andundistorted condition.

5.7.2 Vulcanization Conditions

The conditions of time, temperature and pressure shallbe controlled, and shall be followed asrecommended by the bonding materialmanufacturer. These conditions shall be such as toensure complete vulcanization of the bonding materialand complete bonding to each other of the pre-curedtread rubber, bonding material and buffed casing. Thetemperature shall be uniform throughout the autoclaveand pressure shall be so distributed over the tread as toensure that the bonding material is under uniformpressure.

6 REQUIREMENT FOR RETREADED TYRES

6.1 Freedom from Defects

When examined in accordance with 8.1 each retreadedtyre shall be free from the following:

a) Unrepaired injuries;b) Repairs to injuries other than permitted in terms

of 4.2;c) Repairs not carried out in accordance with the

specification for tyre repairs;d) Creasing, buckling and stretching of the carcass

or bead;e) Uneven flow of bonding material;f) Open splices; andg) Signs of ply, casing, or tread separation.

6.2 Workmanship

The surface of the tyre shall be clean and free fromspew. The outside of the tyre may be treated with afinishing coat.

6.3 Tread

The tyre of tread pattern shall be as specified by thepurchaser, shall be suitable for the class of casing(see 4.1), and shall preferably be the same as, or similarto that of the original tread. The centre of the line ofthe tread shall coincide with the circumferential centreline of the casing and the tee shall show no signs ofdisplacement, or variation in high or shoulder.

4

._

IS 15524:2004

6.4 Dimensions be concentric with the rim and shall be capable of

The width of the tread shall be at least 90 percent ofbeing balanced.

that of a new tyre having a similar tread pattern. When 6.6 Adhesionmeasured at the groove nearest to the circumferentialcentre line of the tyre, the thickness of the undertread The adhesion bet ween the buffed surface of the casing,

and skid depth of the pre-cured treads shall conform the cushion gum and the pre-cured tread rubber,

to the appropriate values given in Table 1. determined in accordance with 8.2 and shall be at least14 N/mm of width.

Table 1 Dimensions of Tread(Clause 6.4) 7 MARKING

All dimensions in millimetres.The retreader’s name or source of manufacture or trade

S1 Typeof Vehicles Undertread Skid Depth Traction name/trade-mark shall appear in legible and durable

No. mm, &fin mm, Min H@WSIY markings on each retreaded tyre.

(1) (2) (3) (4) (5) (6) (7) s ME’1’HODS OF ~SPECTION AND T~T

i) Passenger car 1 6 7 0ii) Light commercial 1 6 8 5 1l,; 8.1 Inspection of Original Casings and Retreaded

vehicle Tyresiii) Truck and bus tyres:

a) less than 900 mm 2 5 12 0 140 Check for compliance with 4.2 and 6.1 by using thesection

b) Over 900 mm 2 5 12 5 ~5,0 relevant method given in IS 13531.

section8.2 Adhesion Between Casing and Tread Rubber

6.5 Suitability for Service of Retreaded Tyres

6.5.1 When fitted (together with a tube in the case of Check for compliance with 4.2 and 6.1 by using the

a non-tubeless tyre) to an appropriate rim and inflated relevant method given in IS 13531.

to the recommended pressure, a reconditioned tyre83 Dimensions of Defects and Injuries

shall recover the correct shape and in the case of a tyrefor a passenger car or light commercial vehicle shall Use the relevant method given in IS 13531.

IS 15524:2004

ANNEX A

(Clause 4.1)

RAW MATERIAL REQUIRED FOR PRE-CURED RETREADING PROCESS

A-1 PRE-CURED TREAD RUBBER

A-1.l Should have a minimum hydro-carbon contentof 50 percent to ensure adequate wear performance.

A-1.2 Should have adequate under tread not less than20 percent of the total tread thickness. The bottomsurface of the tread should be well sanded or brushedto RMA-3.

A-1.3 It shall conform to the requirements laid downin Table 2.

A-2 BONDING GUM

A-2.1 Should be made of natural rubber and shouldhave excellent tack. The material shall be protectedwith proper plastic lining. The cure rate of bondinggum should match the temperature system adopted inthe precured bonding chambers,

A-2.2 It shall conform to the requirements laid downin Table 3.

A-3 FILLING MATERIAL

A-3.1 Should have the same characteristics andspecifications of the bonding gum material, but indifferent thickness to suit the filling requirement.

A-3.2 It shall conform to the requirements laid downin Table 3.

A-4 CEMENT

A-4.1 The cure rate of cement should match thetemperature system adopted. The cement should haveexcellent tack. Solution used must enable the cementto dry up within a reasonable time period as specifiedby the user.

A-4.2 It shall conform to the requirements laid downin Table 4.

A-5 ENVELOPE

Should be made of butyl compounds or any othersuperior material as agreed between manufacturersand users to resist temperature and frequency of use.It shall be elastic enough for easy application on thetyre.

Table 2 Physical Properties for Pre-cured Tread Rubber(Clause 4.1)

s] Test Parameter Requirements Method of Test, RefNo. to Part of Is 3400(1) (2) (3) (4)

i) Visual examination:

a) Appcmmce The material shall have smooth finish without any blemisheslike starvation dirty mmdding blisters, free from foreignmaterial, porosity, Bottom surface shall be buffed to RMA-3Standard.

b) Trade-mark Marking on top [he tread shatl include name of manufacturer/trade-mark and size.

c) Tread wear indicators Each tread shall have tread wear indicators at least 6 Nos.spaced equally around the circumference as per 1S 10914.

d) Width, thickness and tread base As agreed to between the manufacturer and the purchaser.

ii)

iii)

iv)

v)

vi)

vii)

viii)

ix)

Specific gravity, Max

Hardness IRHD/durometer, shore A

Stress-strain properties:

q,,a) 300 percent modulus (k cm2) Mmb) Tensile strength (kglcm ), Mmc) Elongation at break, percent, Min

Air ageirrgChange in physical proper-ties after 120 i 2 h at 70 ~ 2°Ca) Hardness IRHD/shore Ab) Tensile strength, percent, Maxc) Elongation at break, percent, Mu-x

Abmsion resistance index, Mirr

Ash content, percent, Mu-r

Total rubber hydro-carbon content percent, by mass, Min

Arrele tear. kzf/mm. Min

1.14

60-70

100200400

t 5 Unit-10-15160

4

507

Part 9

Part 2

Part 1

Parr 4

Parr 2Parr 1

Part 3

Parr 22

Pan 22

Parr 17-.

6

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IS 15524:2004

Table 3 Physical Properties for Bonding/Cushion Gum (Independently Curable)

(Clause A-3.2)

SINo.(1)

i)

ii)

iii)

iv)

v)

vi)

vii)

Parr 9

Properties Requirements Methodof TestRefto Partof IS 3400

(2) (3) (4)Visual examinationa) Appearance The material shall have smooth finish and free from foreign

matcrird, cure bits, lumps and blisters, wrinkles and kinks

b) Dimensions Thickness 1.2 mm or as detailed earlier or as agreed upon

Specific gravity, Max 1.13

Scorch time, Min 3(ts at 138 f l“C) Mirr[s(Time for 5 units rise from minmum viscosity)

Optimum cure time (t~ at 138 ~ I“C), Mjn 6to 15

(NOTE — Time must be related with O.C.T. of blackvulcanizing cement and as per the system of curing suggestedby the manufacturer)

Hardness lRHD/durometer, shore A 45 to 60 Parr 2

Stress-strain propwties

Ya) 300 percent modulus (k cmz), Mirr 70 Parr 1b) Tensile strength (kg/cm ), J-fin 190 Parr 1c) Elongation at break percent, Mitr 500 Part 1

Angle tear, kgfhnrn,Min 5.0 Part 17

Table 4 Physical Properties for Vulcanizing Cement/Solution(Clause A-4.2)

SI Properties Requirements Methodoffest, ReftoNo.

(1)

i)

ii)

iii)

iv)

v)

vi)

vii)

viii)

ix)

f A

Parr of Is 3400\

Annex(2) (3) (4) (5)

Visual examination The cement shall have uniform consistencyand no sedlmerrtation.

Specificgravity,Max 1.13 Part9Scorch time, Min 3(ts at 138 f l“C) .&fints (Time for 5 units rise from minimum viscosity)

Optimum cure time j5 to 25(tw at 138* 1°C) A4in

Hardness lRHD/durometer, shore A 40 to 50

Stress-strain properties

b, Tensile Strengh ~kycm~, ~i;a) 300 percent modulus (k cm2) Min 45

175c) Elongation at break percent, Mirr 500

Angle tear, kgf/mm, A4in 4.0

Drying : Touch dry time minmum, at25°C to 40”C and 70 RH, Mua) Spray application 10 to 20 minb) Brush application 30 to 40 min

Total solid content, percent by mass &fina) Spray application 8 Annex Ab) Brush application 10

Parr 2

Part 1Part 1Parr 1

Parr 17

NOTE — Test at S1 No. 2 to 7 shall be carried out on the test specimen prepared after vulcanization of the base stock after making itfree from the solvent.

7

IS 15524:2004

ANNEX B

(F’orewni.)

COMMITTEE COMPOSITION

Automotive Tyres, Tubes and Rims Sectional Committee, TED 7

OrganizationCentral Institute of Road Transport, Ptme

All India Motor Transport Congress, New DelhiApollo Tyre Ltd (Representing ATMA), New Delhi

Ashok Le.yland Ltd, Chennai

Association of State Road Transport Undertaking, New DelhAutomotive Research Association of India, Pune

Bajaj Auto Ltd, Pune

13ajajTempo Ltd, Pune

Indian Tyre Technical Advisory Committee, New Delhi

Control lemte of Quality Assurance (Vehicles), Ahmednagar

Defence Research& Development Estt (DRDO), Ahmednagar

Depwtment of Industry Policy& Promotion, New Delhi

Directorate General of Supplies& Disposals, New DelhiEscorts Tractors Ltd (Research& Development Cenke), Fatidabad

Fiat Indian Pvt Ltd, MumbaiGKW Ltd, Durgapur

HMT Ltd, Pinjore

Hyundai Motor India Ltd, ChennaiMaruti Udyog Ltd, Gurgaon

Mahindra & Mahindra Ltd, NasikMinistry of Defence, Jabalpur

Minis[ry of Surfhce Transport (Transport Wing), New DelhiOrdnance Factory Board, VFJ, Kolkata

Schrader Duncon Limited, Mumbai

Socicly of Indian Automobile Manufacturers, New Delh]Tata Engg & Locomotive Co Ltd, Pune

ToyJta Kirloskar Motor India Ltd, BangaloreTractor Manufacturer’s Association, New Delhi

Tritnn Valves L[d, Mysore

Tyre Corpomtion of India Ltd. KolkataWheels India Ltd, Chennai

Ywnalm Motor lndia Pvt Ltd, Faridabad

BIS Directorate General

Representative(s)SHRtA. S. LAKRA (Chafrrnan)

SHRJB. K. CHAPRA(Alternate)SHRJCHJTTARANJANDAS

SHRJVJJAY SETHI

SHRJRAJJV BUDHSRAJA(Alternate)SHRIR. C. BALAKRJSHANAN

SHRJC. SUNDARSANAN(Alternate)DIRELTOR

SHRJP. R. SAJANPAWAR

SHRJN. V. KARANATH(Alternate)SHRJC. Y. DESHPANDE

SHRJT. M. BALARAMAN(Alternate)SHRJV. V. DESHPANDE

SHRJS. M. PARANJAPE(Alternate)SHtu TOM K. THOMAS

SHRJT. FALCAO(Alternate)SHRJA. R. KULKARNI

MAIORDEEPAKSHARMA(Alternate)SHRJR. C. SETHI

SHRJN. KARUPPAJAH(Alternate)SHSUSUSHJLKUMAR

SHRJV. K. JAJN(Alternate)SHRJR. C. SHARMASHRIA.V. ALEXANDER

SHJUVIVEK GUPTA(Alternate)SHRJV. MURUGANSHRJD. BANDOPADHYAY

SHRtB. K. RAY CHAUDHARY(Alternate)SHRJALOK NIGAM

SHSUP. K. AGGARWAL(Alternate)SHRJA. P. GANDHISHRIDEEPAKKUMAR

SHRID. N. DAVE (Alternate)SHRIKAtLASHJAT

SHRIT. K. BASUSHRIY. SOflRA (Alternate)

DIRECTORTECHNICALSHRIAMIR SINGH

SHRIY. SOMRA(Alternate)SHRIP. P. PRABHU

SHRIP. J. SHETTY(Alternate)SHRJRAJAT NANDISHtUA. K. MOHABEY

SHRIR. M. SRtVASTAVA(Alternate)SHRJSACHJOYANAZ.ABI

SHRIT. C. GOPALANSHRJN. L. K. MALHOTRA(Alternate)

SHRIS, MALLIKARJUNAIAH

SHRIS. RAMESH(Alternate)SHRIBISWANATHBHATTACHARJEE

SHRIV. CHAKRARAJANSHRIN. ANBACHESHIAN(Alternate)

SHRIK. C. JAtNSHRJR. K. GUPTA(Alternate)

SHRIK. K.VASHISTHA,Dkctor and Head (TED)[Representing Director General (Ex-o~cio)]

Member SecretarySHRJV. ARUMWAM

Joint Director (TED), BIS

Bureau of Indian Standards

BI S 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 goods andattending to connected matters in the country.

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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 Dot: No. TED 7 (007).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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