1、BSI Standards PublicationBS ISO 15500-1:2015Road vehicles Compressednatural gas (CNG) fuel systemcomponentsPart 1: General requirements anddefinitionsBS ISO 15500-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 15500-1:2015.The UK participation in its pr
2、eparation 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 contract. Users are respo
3、nsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79965 5ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards
4、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 15500-1:2015 ISO 2015Road vehicles Compressed natural gas (CNG) fuel system components Part 1: General requirements and definitionsVhicules routiers Composants des systm
5、es de combustible gaz naturel comprim (GNC) Partie 1: Exigences gnrales et dfinitionsINTERNATIONAL STANDARDISO15500-1Second edition2015-12-01Reference numberISO 15500-1:2015(E)BS ISO 15500-1:2015ISO 15500-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Swi
6、tzerlandAll 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 the internet or an intranet, without prior written permission. Permission can be r
7、equested 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 47copyrightiso.orgwww.iso.orgBS ISO 15500-1:2015ISO 15500-1:2015(E)Foreword iv1 S
8、cope . 12 Normative references 13 Terms and definitions . 24 Construction and assembly . 45 Electrical equipment and wiring . 56 Instructions 57 Marking 5Bibliography 7 ISO 2015 All rights reserved iiiContents PageBS ISO 15500-1:2015ISO 15500-1:2015(E)ForewordISO (the International Organization for
9、Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing 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 r
10、ight to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedur
11、es used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 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 r
12、ules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some 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 iden
13、tified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations 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
14、on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about 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
15、ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific aspects for gaseous fuels.This second edition cancels and replaces the first edition (ISO 15500-1:2000), which has been technically revised.It also incorporates the Amendment ISO 15500-1:2000/AMD 1:2003.ISO 15500 consists of the following parts,
16、 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 methods Part 3: Check valve Part 4: Manual valve Part 5: Manual cylinder valve Part 6: Automatic valve Part 7: Gas injector Pa
17、rt 8: Pressure indicator Part 9: Pressure regulator Part 10: Gas-flow adjuster Part 11: Gas/air mixer Part 12: Pressure relief valve (PRV)iv ISO 2015 All rights reservedBS ISO 15500-1:2015ISO 15500-1:2015(E) Part 13: Pressure relief device (PRD) Part 14: Excess flow valve Part 15: Gas-tight housing
18、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 than stainless steel ISO 2015 All rights reserved vBS ISO 15500-1:2015BS ISO 15500-1:2015Road vehicles Compressed natural gas (CNG
19、) fuel system components Part 1: General requirements and definitions1 ScopeThis part of ISO 15500 specifies general requirements and definitions of compressed natural gas fuel system components, intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design
20、principles, and specifies requirements for instructions and marking.This part of ISO 15500 is applicable to vehicles (mono-fuel, bi-fuel, or dual-fuel applications) using natural gas in accordance with ISO 15403-1. It is not applicable to the following:a) liquefied natural gas (LNG) fuel system comp
21、onents located upstream of, and including, the vaporizer;b) fuel containers;c) stationary gas engines;d) container mounting hardware;e) electronic fuel management;f) refuelling receptacles.NOTE 1 It is recognized that miscellaneous components not specifically covered herein can be examined to meet t
22、he criteria of this part of ISO 15500 and tested according to the appropriate functional tests.NOTE 2 All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified.NOTE 3 This part of ISO 15500 is based upon a service pressure for natural gas as
23、 fuel of 20 MPa 200 bar1) settled at 15 C. Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25.2 Normative referencesThe following documents, i
24、n whole or in part, are normatively 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 6722-1, Road vehicles 60 V and
25、 600 V single-core cables Part 1: Dimensions, test methods and requirements for copper conductor cablesISO 6722-2, Road vehicles 60 V and 600 V single-core cables Part 2: Dimensions, test methods and requirements for aluminium conductor cablesISO 15500-2, Road vehicles Compressed natural gas (CNG) f
26、uel system components Part 2: Performance and general test methodsISO 15500-3, Road vehicles Compressed natural gas (CNG) fuel system components Part 3: Check valve1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2INTERNATIONAL STANDARD ISO 15500-1:2015(E) ISO 2015 All rights reserved 1BS ISO 15500-1:2015
27、ISO 15500-1:2015(E)ISO 15501-1, Road vehicles Compressed natural gas (CNG) fuel systems Part 1: Safety requirements3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1valvedevice by which the flow of a fluid may be controlled3.1.1manual valvevalve w
28、hich is operated manually3.1.2automatic valvevalve which is not operated manually3.1.3automatic cylinder valveautomatic valve rigidly fixed to the cylinder which controls the flow of gas to the fuel system3.1.4check valveautomatic valve which allows gas to flow in only one direction3.1.5excess flow
29、valvevalve which automatically shuts off, or limits, the gas flow when the flow exceeds a set design value3.1.6manual cylinder valvemanual valve rigidly fixed to the cylinder3.1.7pressure relief valve (discharge valve)PRVself-closing device which opens to prevent a pre-determined pressure being exce
30、eded3.1.8service valvemanual valve which is closed only when servicing the vehicle3.2compressed natural gasCNGnatural gas which has been compressed and stored for use as a vehicle fuel3.3filtercomponent containing a screen or media that is intended to remove foreign debris from the gas stream3.4fitt
31、ingconnector used in joining a piping, tubing, or hose system3.5flexible fuel lineflexible tubing or hose through which natural gas flows2 ISO 2015 All rights reservedBS ISO 15500-1:2015ISO 15500-1:2015(E)3.6gas/air mixerdevice for mixing the gaseous fuel and intake air for the engine3.7gas flow adj
32、ustergas flow restricting device, installed downstream of a pressure regulator, controlling gas flow to the engine3.8gas-tight housingdevice which vents gas leakage to outside the vehicle including the gas ventilation hose, the clear opening of which is at least 450 mm23.9natural gas vehicleNGVroad
33、vehicle powered by natural gas3.9.1mono-fuel NGVroad vehicle which operates on natural gas onlyNote 1 to entry: It is also known as “Dedicated Natural Gas Vehicle”.Note 2 to entry: In Europe and in India, the term mono-fuel also applies to a light duty NGV with maximum 15 litre gasoline tank.3.9.2bi
34、-fuel NGVvehicle that has two independent fuel systems (one of them for natural gas) and can run alternatively on either fuel, but only on one at a time3.9.3dual-fuel NGVvehicle that has two independent fuel systems (one of them for natural gas) and can run on both fuels simultaneously; it also may
35、run on one fuel alone3.10pressure indicatorpressurized device which indicates the gas pressure; it can be a gauge or a sensor3.11pressure regulatordevice used to control the delivery pressure of gaseous fuel to the engine3.12pressure relief devicePRDone-time-use device triggered by excessive tempera
36、ture or temperature and pressure acting in series or in parallel which vents gas to protect the cylinder from rupture3.13rigid fuel linetubing which has been designed not to flex in normal operation and through which natural gas flows ISO 2015 All rights reserved 3BS ISO 15500-1:2015ISO 15500-1:2015
37、(E)3.14service pressuresettled pressure of 20 MPa (200 bar) at a uniform gas temperature of 15 CNote 1 to entry: Other service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) settled at 15 C service pressure system will requi
38、re pressures to be multiplied by 1,25.3.15test pressurepressure to which a component is taken during acceptance testing3.16working pressuremaximum pressure to which a component is designed to be subjected to and which is the basis for determining the strength of the component under consideration3.17
39、burst pressurepressure which causes failure and consequential fluid loss through the component envelope3.18gas injectordevice for introducing gaseous fuel into the engine or associated intake system3.19fuel railpipe or duct that connects the gas injectors3.20multifunctional componentdevice consistin
40、g of two or more different components specified by this part of ISO 15500, combined or fitted together4 Construction and assembly4.1 Components shall be made of materials suitable for use with CNG. Resistance to galvanic corrosion shall be taken under consideration when joining components containing
41、 dissimilar materials.4.2 Jointing components shall provide gas-tight sealing performance. Where joints are required to be disassembled, it is recommended that any tapered thread fittings be replaced.4.3 Threads for components attached to the cylinder shall be clean-cut, even, without surface discon
42、tinuities, to gauge and conform to International Standards applied to the CNG Cylinder neck thread.4.4 Components shall be suitable for service over one of the following temperatures ranges:Engine compartment On-board (except engine compartment)Moderate -20 C to 120 C -20 C to 85 CCold -40 C to 120
43、C -40 C to 85 C4.5 All non-metallic materials used in seals and diaphragms shall comply with the oxygen ageing test specified in ISO 15500-2.4.6 All non-metallic materials in contact with natural gas shall comply with the non-metallic material immersion test specified in ISO 15500-2.4 ISO 2015 All r
44、ights reservedBS ISO 15500-1:2015ISO 15500-1:2015(E)4.7 All components subject to weather exposure and other corrosive conditions shall be made of corrosion resistant material or otherwise protected and comply with the corrosion resistance tests specified in ISO 15500-2.4.8 It is recognized that mul
45、tifunctional components may be made up of several components. Such components shall be examined for conformance to ISO 15500-3 and subsequent parts and tested according to the appropriate functional tests.4.9 Automatic fuel flow shut-off valves shall be closed when de-energized.5 Electrical equipmen
46、t and wiring5.1 Any openings in electrical wiring components shall be equipped with means to prevent chafing and abrasion of the wire insulation.5.2 Electrical equipment and circuit wiring in a component shall be of automotive quality with respect to mechanical strength, insulation and current carry
47、ing capacity, in accordance with ISO 6722-1 and ISO 6722-2.5.3 Materials used for electrical construction shall be suitable for their particular application. When determining the acceptability of an electrical insulating material, consideration shall be given to its mechanical strength, dielectric s
48、trength, heat-resistant properties, the degree to which it is enclosed or protected, and any other features influencing fire and accident hazards.6 Instructions6.1 Clear, concise printed instructions and diagrams, stated in terms clearly understandable and adequate for proper assembly, installation,
49、 maintenance and safe operation, shall be made available by the manufacturer of the component and component package.6.2 Instructions for periodic maintenance of components, as required, shall be provided. Parts which require replacement shall be identified.6.3 Printed instructions shall state that the installation shall be in accordance with the regulations of the local authority, or, in the absence of local regulations, in accordance with ISO 15501-1.6.4 This information shall be in a f
