1、BSI Standards PublicationBS ISO 17464:2016Pneumatic tubes forautomotive vehicles Technical requirements and testmethodsBS ISO 17464:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 17464:2016.The UK participation in its preparation was entrusted to Technica
2、lCommittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British
3、 Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 77899 5ICS 83.160.01Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 20
4、16.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 17464:2016 ISO 2016Pneumatic tubes for automotive vehicles Technical requirements and test methodsChambres air pour vhicules automobiles Exigences techniques et mthodes dessaiINTERNATIONAL STANDARDISO17464First editi
5、on2016-02-01Reference numberISO 17464:2016(E)BS ISO 17464:2016ISO 17464:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any for
6、m or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet
7、 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 17464:2016ISO 17464:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Materials, form and fit 15 Test requirements . 26 Air tightness 27 Marking 38
8、Sampling 3Annex A (normative) Preparation of dumbbell test specimen from tube . 4Annex B (normative) Test conditions and test procedure for set after ageing . 5Annex C (normative) Accelerated ageing test . 6Annex D (informative) Identification scheme for month and year of manufacturing (one example
9、for the scheme of marking month and year on tube) 7 ISO 2016 All rights reserved iiiContents PageBS ISO 17464:2016ISO 17464:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Intern
10、ational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with
11、 ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,
12、Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of th
13、e elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations r
14、eceived (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs
15、adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 31, Tyres, rims and valves.iv ISO 2016 All rights reservedBS ISO 17464:2016INTERNATIONAL STANDARD ISO 17464:2016(E
16、)Pneumatic tubes for automotive vehicles Technical requirements and test methods1 ScopeThis International Standard specifies the technical requirements and test methods for tubes of pneumatic tyres for automotive vehicles.2 Normative referencesThe following documents, in whole or in part, are normat
17、ively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 37, Rubber, vulcanized or thermoplastic Determination of ten
18、sile stress-strain propertiesISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance testsISO 3877-3, Tyres, valves and tubes List of equivalent terms Part 3: TubesISO 9413, Tyre valves Dimensions and designation3 Terms and definitionsFor the purposes of this document, th
19、e terms and definitions given in ISO 3877-3 apply.4 Materials, form and fit4.1 The tubes shall be manufactured from an appropriate rubber compound and vulcanized to an endless annular ring shape and shall be with a valve or spud conforming to ISO 9413.4.2 The tubes shall be classified into the follo
20、wing two classes:a) class A natural rubber and its derivatives and blends;b) class B butyl rubber/halobutyl rubber and its derivative and blends.4.2.1 A blend shall be named after prime rubber whose percentage by volume is more than 60 % in the compound.4.3 The tube shall be uniform in thickness, fr
21、ee from flaws and designed to fit in a tyre of the corresponding nominal size.4.3.1 Thickness uniformityExcept for the region at or near lap or splice, the thickness of the tube when measured along the longitudinal direction of the tube shall not vary from the arithmetic mean of the readings by 17,5
22、 % at any point. ISO 2016 All rights reserved 1BS ISO 17464:2016ISO 17464:2016(E)4.3.2 The arithmetic mean of the tube thickness shall be determined for the points which lie in the same circumferential line or the length of the tube (see Figure 1). The thickness variation shall be determined for cir
23、cumferential line at the crown centre.12Key1 crown2 crown (17,5 % from average of four checks) equally spaced around the circumference3 base4 valveFigure 1 Measurement of tube thickness uniformity5 Test requirements5.1 Each type of tube shall conform to the following requirements.5.1.1 ElongationDum
24、bbell test pieces punched out in circumferential direction of the tube when tested in accordance ISO 37 and Annex A shall have elongation at break not less than 500 % for “class A” tubes and not less than 450 % for “class B” tubes.5.1.2 Strength of spliceTensile strength of splice determined on dumb
25、bell in accordance with ISO 37 and Annex A shall not be less than 85 kgf/cm2for “class A” tubes and 35 kgf/cm2for “class B” tubes.5.1.3 Set after ageingDumbbell test pieces punched out in circumferential direction of the tube when subjected to test conditions and test procedure in accordance with An
26、nex B shall have set after ageing not more than 25 % for “class A” tubes and not more than 35 % for “class B” tubes.5.1.4 Accelerated ageingDumbbell test pieces punched out in circumferential direction of the tube body when subjected to accelerated ageing test at (100 2) C for 48 h and tested in acc
27、ordance with ISO 37, ISO 188 and Annex C shall not have a percentage drop in elongation at break more than 35 % from original, for both “class A” and “class B” tubes.6 Air tightnessEach type of tube with valves attached shall be inflated to just round out and tested in water for the evidence of any
28、leakage. Alternatively, vacuum leak or pressure-less detection method may be used as per the manufacturers practice in lieu of the water test method. The tube shall not show any leakage.2 ISO 2016 All rights reservedBS ISO 17464:2016ISO 17464:2016(E)7 Marking7.1 Tubes shall be permanently and legibl
29、y marked on the outside with the following.a) The manufacturers name or trade name.b) The tyre size designation or designations for which the tube is applicable. The size designation description shall contain the following:1) the nominal tyre section width code;2) the nominal rim diameter code;3) th
30、e nominal aspect ratio, if applicable;4) “R” to identify radial tyre application;5) the character “” or the letter “D” to identify bias tyre application.c) The manufacturing month and year shall be indicated clearly with the appropriate method, and one scheme example is given in Annex D.d) The word
31、“BUTYL” and/or blue line of 2,0 mm minimum width to identify tube of class B standard.8 SamplingThe scale of sampling and the criteria of acceptance shall be as agreed to between the manufacturer and the purchaser. ISO 2016 All rights reserved 3BS ISO 17464:2016ISO 17464:2016(E)Annex A (normative) P
32、reparation of dumbbell test specimen from tubeA.1 Preparation of test piecesA.1.1 Test pieces shall be in dumbbell shape and shall be taken in the circumferential direction of a tube, from portion except the splice joint for the elongation test. For testing strength of joint splice, dumbbell shall b
33、e punched out from the splice joint at the centre as shown in Figure A.1.A.1.2 The number of test pieces shall be four each from a tube. Size of test pieces shall be 6 mm (or 13 mm) dumbbell test pieces, for measurement of tensile strength of splice and elongation of body.A.1.3 The mean value of bot
34、h ends of parallel parts shall be used as the thickness of test pieces for calculating the tensile strength of splice joints.A.1.4 For elongation and tensile strength of joints, measured median value of four test pieces shall be used.1Key1 splice joint2 for tensile strength test of splice joint3 for
35、 elongation at break testFigure A.1 Method of taking test pieces4 ISO 2016 All rights reservedBS ISO 17464:2016ISO 17464:2016(E)Annex B (normative) Test conditions and test procedure for set after ageingB.1 Test conditions for ageingType of oven : Air ovenTemperature : 104 C to 110 CTime to be kept
36、in oven : 5 hDimensions of test piece : 6 mm wide 25 mm long measured on 6 mm dumbbellStretch of test piece during ageing : 50 %B.2 Determination of the setThe test piece shall be removed from the oven and allowed to cool under tension for 2 h. The tension shall be released and the percentage set me
37、asured after a rest of not less than 8 h or more than 24 h.The tension set (set after ageing) shall be expressed as the extension remaining after a specimen has been stretched and allowed to retract in a specified manner and the same shall be expressed as a percentage of the original length. Formula
38、 (B.1) is used to calculate the percentage tension set.Tensionset 10010 0=()ll l/ (B.1)wherel1is the reference length after recovery;l0is the unstrained reference length. ISO 2016 All rights reserved 5BS ISO 17464:2016ISO 17464:2016(E)Annex C (normative) Accelerated ageing testC.1 Preparing the test
39、 piecesPrepare four test pieces as specified in Annex B and subject them to the accelerated ageing for (100 2) C for 48 h.C.2 Measuring the elongation at breakMeasure the elongation at break in accordance with ISO 37 and then calculate the percentage drop in elongation at break compared with respect
40、ive un-aged elongation at break using Formula (C.1):PDEB ()/oa o=100LL L (C.1)wherePDEB is the percentage drop in elongation at break after ageing;Lois the median value of elongation at break percentage before ageing test;Lais the median value of elongation at break percentage after ageing test.6 IS
41、O 2016 All rights reservedBS ISO 17464:2016ISO 17464:2016(E)Annex D (informative) Identification scheme for month and year of manufacturing (one example for the scheme of marking month and year on tube)D.1 Identification schemeD.1.1 Manufacturing month and year are engraved as per scheme depicted in
42、 Figure D.1 or printed as per D.1.6.D.1.2 Month code circle and year are to be engraved on the tube body.D.1.3 Each month should be identified by a punch marking of at least 0,5 mm diameter in the respective quarter.D.1.4 After completing 1 year, fresh identification shall be started again for the n
43、ext year with next circle.D.1.5 After completing all three circles, re-engraving can be done after masking the previous engraving/punch marking.D.1.6 Alternative method which indicates the week and year or month and year of manufacturing is also acceptable.Dimensions in millimetresFigure D.1 Scheme
44、of marking month and year on tubeEXAMPLE Identification for April 2016 is depicted in Figure D.1. However, dots can be in any quadrant. Max dots in a quadrant are three. ISO 2016 All rights reserved 7BS ISO 17464:2016ISO 17464:2016(E) ISO 2016 All rights reservedICS 83.160.01Price based on 7 pagesTh
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