1、BSI Standards PublicationBS ISO 15500-20:2015Road vehicles Compressednatural gas (CNG) fuel systemcomponentsPart 20: Rigid fuel line in material otherthan stainless steelBS ISO 15500-20:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO15500-20:2015.The UK pa
2、rticipation in its preparation was entrusted to TechnicalCommittee GSE/40, Gas supply equipment for natural gas 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 cont
3、ract. Users are responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79967 9ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the autho
4、rity of theStandards Policy and Strategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 15500-20:2015 ISO 2015Road vehicles Compressed natural gas (CNG) fuel system components Part 20: Rigid fuel line in material other than stainless st
5、eelVhicules routiers Composants des systmes de remplissage en gaz naturel comprim Partie 20: Circuit de combustible rigide en matriaux autres que lacier inoxydableINTERNATIONAL STANDARDISO15500-20Second edition2015-12-01Reference numberISO 15500-20:2015(E)BS ISO 15500-20:2015ISO 15500-20:2015(E)ii I
6、SO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
7、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 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09
8、 47copyrightiso.orgwww.iso.orgBS ISO 15500-20:2015ISO 15500-20:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Marking and labelling . 25 Qualifications for construction and assembly . 26 Tests . 26.1 Applicability 26.2 Hydrostatic strength 36.3 Continued operation
9、36.4 Corrosion resistance 36.5 Bending 3Bibliography 4 ISO 2015 All rights reserved iiiContents PageBS ISO 15500-20:2015ISO 15500-20:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari
10、ng International 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 lia
11、ison with 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 Dir
12、ectives, 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 s
13、ome of the 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 decla
14、rations received (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 ab
15、out ISOs 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 22, Road vehicles, Subcommittee SC 41, Specific aspects for gaseous fuels.This second edition cancels and
16、 replaces the first edition (ISO 15500-20:2007), which has been technically revised.ISO 15500 consists of the following parts, under the general title Road vehicles Compressed natural gas (CNG) fuel system components: Part 1: General requirements and definitions Part 2: Performance and general test
17、methods Part 3: Check valve Part 4: Manual valve Part 5: Manual cylinder valve Part 6: Automatic valve Part 7: Gas injector Part 8: Pressure indicator Part 9: Pressure regulator Part 10: Gas-flow adjuster Part 11: Gas/air mixer Part 12: Pressure relief valve (PRV) Part 13: Pressure relief device (PR
18、D)iv ISO 2015 All rights reservedBS ISO 15500-20:2015ISO 15500-20:2015(E) Part 14: Excess flow valve Part 15: Gas-tight housing and ventilation hose Part 16: Rigid fuel line in stainless steel Part 17: Flexible fuel line Part 18: Filter Part 19: Fittings Part 20: Rigid fuel line in material other th
19、an stainless steel ISO 2015 All rights reserved vBS ISO 15500-20:2015BS ISO 15500-20:2015Road vehicles Compressed natural gas (CNG) fuel system components Part 20: Rigid fuel line in material other than stainless steel1 ScopeThis part of ISO 15500 provides specific requirements and tests applicable
20、to the rigid fuel line in carbon steel, intended for use on the types of motor vehicles, as defined in ISO 3833, with a service pressure for natural gas as a fuel of 20 MPa (200 bar) settled at 15 C.ISO 15500 is intended to be applied to vehicles using natural gas which comply with requirements esta
21、blished in ISO 15403-1 (mono-fuel, bi-fuel, or dual-fuel applications). This part of ISO 15500 does not apply to the following:a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer;b) fuel containers;c) stationary gas engines;d) container mounting ha
22、rdware;e) electronic fuel management;f) refuelling receptacles.NOTE All references to pressure in this part of ISO 15500 are considered gauge pressures unless otherwise specified.1)2 Normative referencesThe following referenced documents are indispensable for the application of this document. For da
23、ted references, only the edition cited applies. For the undated references, the latest edition of the referenced document (including any amendments) applies.ISO 15500-1, Road vehicles Compressed natural gas (CNG) fuel system components Part 1: General requirements and definitionsISO 15500-2:2), Road
24、 vehicles Compressed natural gas (CNG) fuel system components Part 2: Performance and general test methods3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 15500-1 apply.1) 1 bar = 100 kPa = 0,1 MPa.2) To be published. (Revision of ISO 15500-2:2012)INTE
25、RNATIONAL STANDARD ISO 15500-20:2015(E) ISO 2015 All rights reserved 1BS ISO 15500-20:2015ISO 15500-20:2015(E)4 Marking and labellingMarking of the component shall provide sufficient information to allow the following to be traced:a) the manufacturers or agents name, trademark or symbol;b) the model
26、 designation (part number);c) the working pressure or pressure and temperature range.The following additional markings are recommended: the direction of flow (when necessary for correct installation); the type of fuel; electrical ratings (if applicable); the symbol of the certification agency; the t
27、ype approval number; the serial number or date code; a reference to this part of ISO 15500.Every fuel line shall have at intervals not greater than 0,5 m the abovementioned information at least a), b) and c). It shall be clearly legible and indelible. Marking shall be considered indelible if it cont
28、inues to be legible after the tests in Clause 6.5 Qualifications for construction and assemblyThe rigid fuel line shall comply with the applicable provisions of ISO 15500-1 and ISO 15500-2, and with the tests specified in Clause 6. Tolerances should follow the specifications of ISO 15500-2.The rigid
29、 fuel line in carbon steel shall be seamless.The rigid fuel line and the fittings devices shall be compatible, in order to avoid electrochemical corrosion.6 Tests6.1 ApplicabilityThe tests shall be carried out as indicated in Table 1Table 1 Applicable testsTest methods Applicable Test procedure as r
30、e-quired by ISO 15500-2Specific test requirements of this part of ISO 15500Hydrostatic strength X X X (see 6.2)Leakage X XExcess torque resistanceBending momentContinued operation X X X (see 6.3)Corrosion resistance X X X (see 6.4)Oxygen ageing XaXaaApplicable to non-metallic coating.2 ISO 2015 All
31、rights reservedBS ISO 15500-20:2015ISO 15500-20:2015(E)Test methods Applicable Test procedure as re-quired by ISO 15500-2Specific test requirements of this part of ISO 15500Ozone ageingHeat ageingAutomotive fluids X XElectrical over-voltagesNon-metallic synthetic immersion XaXaVibration resistanceBr
32、ass material compatibilityBending X X (see 6.5)ConductivityaApplicable to non-metallic coating.6.2 Hydrostatic strengthThe rigid fuel line shall be tested according to the procedure for testing hydrostatic strength specified in ISO 15500-2.Test pressure shall be four times working pressure.NOTE The
33、higher hydrostatic test pressure for the rigid fuel line than the other parts of ISO 15500 components is due to the necessary provisions to cope for eventual damage or abrasions under normal operation.6.3 Continued operationThe rigid fuel line shall be subjected to a continued operation test in acco
34、rdance with ISO 15500-2 for a total of 100 000 cycles. Following cycling, perform the hydrostatic test in accordance with 6.2.6.4 Corrosion resistanceThe rigid fuel line shall be subjected to a corrosion resistance test in accordance with ISO 15500-2 for a total of 500 hours. The corrosion resistanc
35、e shall be made on the rigid fuel line without any protective sleeve.6.5 BendingTest the rigid fuel line according to the following procedure and acceptance criterion.a) Select a mandrel with a diameter according to Table 2.b) Bend the rigid fuel line over this mandrel once, forming a “U” shape.c) P
36、erform corrosion resistance test according to ISO 15500-2:, Clause 10 and 6.4.d) Close the rigid fuel lines ends and pressurize it to four times its working pressure. At completion of the test, the rigid fuel line shall not leak.Table 2 Rigid fuel line external (RFLE) diameterRFLE diameter MANDREL d
37、iameter8 mm 3 RFLE diameter8 mm 5 RFLE diameterTable 1 (continued) ISO 2015 All rights reserved 3BS ISO 15500-20:2015ISO 15500-20:2015(E)Bibliography1 ISO 3833, Road vehicles Types Terms and definitions2 ISO 15403-1, Natural gas Natural gas for use as a compressed fuel for vehicles Part 1: Designati
38、on of the quality3 ISO/TR 15403-2, Natural gas - Natural gas for use as a compressed fuel for vehicles Part 2: Specification of the quality4 ISO 2015 All rights reservedBS ISO 15500-20:2015BS ISO 15500-20:2015ISO 15500-20:2015(E) ISO 2015 All rights reservedICS 43.060.40Price based on 4 pagesThis pa
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