Draft is 13098_Tube for Pneumatic Tyres

7/28/2019 Draft is 13098_Tube for Pneumatic Tyres

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For BIS Use Only

_______________________________________________________________________________

Doc: TED 7(743)W

November 2009

DraftIndian StandardAUTOMOTIVE VEHICLES TUBES FOR PNEUMATIC TYRES SPECIFICATION

(First Revisionof IS 13098)_______________________________________________________________________________0 FOREWORD

(Formal Clause. Will be added later on)

This standard was first published in 1991. The first revision is based on the experience gained afterpublication of the standard. This standard has been revised to keep pace with the latesttechnological advancement in the field of tubes for automotive vehicles. This revision has beenundertaken after due consideration of the practices prevalent in the industry. Assistance has beenderived from the following publication while preparing this standard:

JIS D 4231 : 1995 Inner tubes for automobiles tyres, issued by the Japanese Industrial StandardsCommittee (JISC)

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal 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 ofsignificant places retained in the rounded off value shall be the same as that of the specified value inthis standard.

1 SCOPE

1.1 This Indian Standard specifies the requirements of tubes for pneumatic tyres for automotivevehicles covered by M1, T1, T2, M2, M3, N, T3,T4 and two and three wheelers as defined in IS14272:2009

2 REFERENCES

The following standards contain provisions, which, through reference in this text, constitute

provisions of this standard. At the time of publication the editions indicated was valid. All standardsare subject to revision and parties to agreements based on this standard are encouraged toinvestigate the possibility of applying the most recent edition of the standard indicated below.

IS No. Title

3400(Part 1):1987 Methods of test for vulcanized rubbers Part 1 Tensile stress strainproperties (second revision)

9081: 2001 Automotive vehicles Valves and valve accessories for pneumatic tyres Specification (third revision)

14272:2009 Automotive vehicles Types, Terminology

3 MATERIALS, FORM AND FIT

3.1 The tubes shall be manufactured from an appropriate rubber compound and vulcanized to anend less annular ring shape and shall be with a valve or spud conforming to IS 9081.

3.2 The tubes shall be classified into the following two classes:

a) Class A Butyl rubber / Halo-butyl rubber and its derivative and blends, andb) Class B Natural Rubber and its derivatives and blends


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3.3 The tube shall be uniform in thickness, free from flaws and designed to fit in a tyre of thecorresponding nominal size.

3.3.1 Thickness Uniformity

Except for the region at or near lap or splice the thickness of the tube when measured along thelongitudinal direction of the tube, shall not vary from the arithmetic mean of the readings by 17.5percent at any point.

3.3.2 The arithmetic mean of the tube thickness shall be determined for the points which lie in thesame circumferential line or the length of the tube. The thickness variation shall be determined foreach of the four circumferential lines, that is crown centre, base centre, right side wall centre andleft side wall centre.

Fig. 1 Measurement of Tube Thickness Uniformity

4 MARKINGS

Tubes shall be permanently and legibly marked on the outside the following.

4.1 Make (manufacturers name) or trade name.

4.2 Tyre size designation or designation for which the tube is applicable. The size designationdescription shall contain:

a) Nominal tyre section width code;b) Nominal rim diameter code;c) Nominal aspect ratio, if applicable; andd) R to identify Radial tyre application.

4.3 Indication of month and year of manufacturing as per scheme given in Annex A.

4.4 The word BUTYL and or blue line of 3 mm minimum width to identify tube of class A.

5 TEST REQUIREMENTS

5.1 Each type of tube shall conform to the following requirements

5.1.1Elongation

Dumbbell test pieces punched out in circumferential direction of the tube when tested in accordanceIS 3400(Part 1):1987 and Annex B shall have elongation at break not less than 450% for Class Atubes and not less than 500% for Class B tubes.


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5.1.2 Strength of Splice

Tensile strength of splice determined on dumbbell in accordance with IS 3400(Par1):1987 andAnnex Bshall not be less than 35 kgf/cm for class A tubes and 85 kgf/cm for Class B tubes.

5.1.3 Set after Ageing

Dumb bell test pieces punched out in circumferential direction of the tube when subjected to test

conditions and test procedure in accordance with Annex Cshall have set after aging not more than35% for class A tubes and not more than 25% for class B tubes.

5.1.4Accelerated Aging

Dumbbell test pieces punched out in circumferential direction of the tube body when subjected toaccelerated aging test as 100 C for 48 hrs and tested in accordance with IS 3400(Part 1):1987 andAnnex D shall not have drop in elongation at break more than 35% from original, for both class Aand class B tubes.

6 AIR TIGHTNESS

Each type of tube with valves attached shall be inflated to just round out and tested in water for the

evidence of any leakage. Alternatively, vacuum leak or pressure-less detection method may be usedas per the manufacturers practice in lieu of the water test method. The tube shall not show anyleakage or defective workmanship.

7 SAMPLING

The scale of sampling and the criteria of acceptance shall be as agreed to between the manufacturerand the purchaser.

8 BIS CERTIFCATION MARKING

The product may also be marked with the Standard Mark.

The use of the Standard Mark is governed by the provisions of theBureau of Indian Standards Act.1986 and the Rules and Regulations made there under. The detail of conditions under which thelicense for the use of Standard Mark may be rated to manufacturers or producers may be obtainedfrom the Bureau of Indian Standards.


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ANNEX A

(Clause 4.3)

IDENTIFICATION SCHEME FOR MONTH AND YEAR OF MANUFACTURING

A-1 IDENTIFICATION SCHEME

A-1.1 Manufacturing Month and Year are engraved as per scheme depicted in Fig. 2.

A-1.2 Month code circle and year to be engraved 100 mm right to the valve block in the bottom halfmould.

A-1.3 Quarters are as per the calendar year, for example Quarter-1 January-March, Quarter-2 April-June, Quarter-3 July-September and Quarter-4 October-December.

A-1.4 Each month should be identified by a punch marking of at least 0.5 mm diameter in the

respective Quarter.

A-1.5 After completing one year, fresh identification shall be started again for the next year withnext circle.

A-1.6 After completing all three circles, re-engraving can be done after masking the previousengraving/punch marking.

A-1.7 Alternative method which clearly indicates the month and year of manufacturing is alsoacceptable.

Fig. 2 Scheme of marking Month and Year on Tube

(Example: Identification for April 2008 depicted in the drawing above)


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ANNEX B

(Clause 5.1.1)

PREPARATION OF DUMB-BELL TEST SPECIMEN FROM TUBE

B-1 PREPARATION OF TEST PIECES

B-1.1 Test pieces shall be the dumbbell shape and to be taken in the circumferential direction of atube, from portion except the splice joint for the elongation test. For testing strength of joint

splice, dumbbell shall be punched out from the splice joint as the centre as shown in the Fig. 2.

B-1.2 The number of test pieces shall be 4 each from a tube. Size of test pieces shall be 6mm (or13mm) dumbbell test pieces , for measurement of tensile strength.

B-1.3 The mean value of both ends of parallel parts shall be used as the thickness of test pieces forcalculating the tensile strength of splice joints.

B-1.4 For elongation and tensile strength of joints, measured median value of 4 test pieces shall beused.

Fig. 3 Method of Taking Test Pieces


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ANNEX C(Clause 5.1.3)

TEST CONDITIONS AND TEST PROCEDURE FOR SET AFTER AGEING

C-1 TEST CONDITIONS FOR AGEING

Type of Oven : Air OvenTemperature : 104C to 110CTime to be kept in oven : 5 HoursDimensions of test piece : 6 mm wide 25 mm long measured on 6 mm dumbbellStretch of test piece during : 50 percentageing

C-2 DETERMINATION OF THE SET

The test piece shall be removed from oven and allowed to cool under tension for 2 hours.

The tension shall be released and percentage set measured after a rest of not less than 8hours or more than 24 hours.


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ANNEX D

(Clause 5.1.4)

ACCELERATED AGEING TEST

D-1PREPARING THE TEST PIECES

Prepare 4 test pieces as specified in Annex B and subject them to the accelerated ageingfor 100 2 C for 48 hours.

D-2 MEASURING THE TENSILE STRENGTH

Measure the tensile strength in accordance with IS 3400(Part 1):1987 and then calculatethe percentage drop in elongation at break compared with respective un-aged elongationat break from the following formula:

PDEB = (La Lo) 100

Lo

Where, PDEB : Percent drop in Elongation at break after ageingLo : Median value of Elongation at break percentage before ageing testLa : Median value of Elongation at break percentage after ageing test


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:23230131 : 4348 :3236311 -: [email protected]

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, 20 Nov 2009,

: 20-02-2010 , :

7(743)W - - ( 13098)

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: 20-02-2010 ,

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AUTOMOTIVE TYRES, TUBES AND RIMS SECTIONAL COMMITTEE, TED 7_________________________________________________________________________ADDRESSED TO:

1. All Interested Members of Transport Engineering Division Council, TEDC2. All Members of Automotive Tyres, Tubes and Rims Sectional Committee, TED 73. All Others Interested.

Dear Sir(s),

Please find enclosed the following draft Indian Standard, which was circulated by e-mail20 Nov 2009 by indicating last date of comments 20 Jan 2010. Hard copy is being

circulated with modified date and comments as indicated.

Doc No. Title

TED 7(743) W AUTOMOTIVE VEHICLES TUBES FOR PNEUMATIC TYRES SPECIFICATION (First Revision of IS 13098)

Kindly examine this draft Indian standard and forward your views stating any difficultieswhich you are likely to experience in your business or profession, if this is finally adoptedas National Standards.

Last date for comments: 20-02-2010

Comments, if any, may please be made in the enclosed format and mailed to theundersigned at the above address.

This documentis also available on BIS website www.bis.org.in

Thanking you,

Yours faithfully,

(T.V. Singh)

Encl.: As above Sc `E & Head (Transport Engg.)

Please Contact at Phone: 23230131/4348 Telefax: 23236311, e-Mail: [email protected]

DRAFT IN WIDE

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ADVICE

Ref. Date

TED 7/T -3 -01-2010


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Draft is 13098_Tube for Pneumatic Tyres