1、BSI Standards PublicationBS ISO 12614-1:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 1: General requirements anddefinitionsBS ISO 12614-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12614-1:2014.The UK participation in its pre
2、paration 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 respon
3、sible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77042 5ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards P
4、olicy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-1:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and definitionsVhicules routiers quipements pour vhicules utilisant le gaz natur
5、el liqufi (GNL) comme combustible Partie 1: Exigences gnrales et dfinitionsINTERNATIONAL STANDARDISO12614-1First edition2014-07-01Reference numberISO 12614-1:2014(E)BS ISO 12614-1:2014ISO 12614-1:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless o
6、therwise 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 requested from either ISO at the addre
7、ss below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 12614-1:2014ISO 12614-1:2014(E) ISO 2014 All rights reserved iiiContents P
8、ageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Construction and assembly . 45 Electrical equipment and wiring . 46 Instructions 57 Marking 5Annex A (informative) Construction and assembly 6BS ISO 12614-1:2014ISO 12614-1:2014(E)ForewordISO (the International Organizatio
9、n for 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
10、 the right 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 pr
11、ocedures 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 edito
12、rial rules 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 righ
13、ts identified 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 expl
14、anation 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 docu
15、ment is ISO/TC 22, Road vehicles, Subcommittee SC 25, Vehicles using gaseous fuels.ISO 12614 consists of the following parts, under the general title Road vehicles Liquefied natural gas (LNG) fuel system components: Part 1: General requirements and definitions Part 2: Performance and general test me
16、thods Part 3: Check valve Part 4: Manual valve Part 5: Tank pressure gauge Part 6: Overpressure regulator Part 7: Pressure relief valve Part 8: Excess flow valve Part 9: Gas-tight housing and ventilation hose Part 10: Rigid fuel line in stainless steel Part 11: Fittings Part 12: Rigid fuel line in m
17、aterial other than stainless steel Part 13: Pressure control regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-1:2014ISO 12614-1:2014(E) Part 16: Heat exchanger - vaporizer Part 17: Natural gas detector Part
18、 18: Gas temperature sensor ISO 2014 All rights reserved vBS ISO 12614-1:2014BS ISO 12614-1:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and definitions1 ScopeThis part of ISO 12614 specifies general requirements and definitions of liquefied natur
19、al gas fuel system components, intended for use on the types of motor vehicles as defined in ISO 3833. It also provides general design principles and specifies requirements for instructions and marking.This part of ISO 12614 is not applicable to the following:a) fuel containers;b) stationary gas eng
20、ines;c) container mounting hardware;d) electronic fuel management;e) fuelling receptacles.NOTE 1 It is recognized that miscellaneous components, not specifically covered herein can be examined to meet the criteria of this part of ISO 12614 and tested according to the appropriate functional tests.NOT
21、E 2 All references to pressure in this part of ISO 12614 are to be considered gauge pressures unless otherwise specified.NOTE 3 This part of ISO 12614 is based upon a working pressure for natural gas as fuel of 1,6 MPa 16 bar1). Other working pressures can be accommodated by adjusting the pressure b
22、y the appropriate factor (ratio). For example, a 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated
23、 references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 3833:1977, Road vehicles Types Terms and definitionsISO 6722 (all parts), Road vehicles 60 V and 600 V single-core cablesISO 15500:2012, Road vehi
24、cles Compressed natural gas (CNG) fuel system components3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1burst pressurepressure which causes failure and consequential fluid loss through the component envelope1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1
25、 N/mm2.INTERNATIONAL STANDARD ISO 12614-1:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-1:2014ISO 12614-1:2014(E)3.2electronic control unitECUdevice for control of the engine it is not in the scope of ISO 126143.3filtercomponent that is intended to remove contaminants from the gas stream3.4fitt
26、ingconnector used in joining a piping, tubing, or hose system3.5flexible fuel lineflexible tubing or hose through which natural gas flows3.6fuel content gaugedevice that shows the liquid fuel level in the fuel tank3.7differential pressure fuel content gaugefuel content gauge based on the difference
27、of the pressure at the top and bottom parts of the fuel tank (the system measures the weight of the liquid)3.8capacitance fuel content gaugefuel content gauge based on the relationship between the mass and electrical capacitance of natural gas3.9gas-air mixerdevice for mixing the gaseous fuel and in
28、take air for the engine3.10gas flow adjustergas flow restricting device, installed downstream of a pressure regulator, controlling gas flow to the engine3.11gas injectordevice for introducing gaseous fuel into the engine or associated intake system3.12gas temperature sensordevice for gas temperature
29、 measurement, which is placed downstream of the vaporizer3.13gas tight housingdevice which vents gas leakage to outside the vehicle including the gas ventilation hose, the clear opening of which is at least 450 mm23.14heat exchanger - vaporizerdevice for vaporizing the cryogenic liquid fuel and deli
30、vering it as gas to the engine with a gas temperature between 40 C and +85 C3.16liquefied natural gasLNGnatural gas which has been liquefied after processing for storage, transportation, or use as a fuel2 ISO 2014 All rights reservedBS ISO 12614-1:2014ISO 12614-1:2014(E)3.17LNG vehiclevehicle which
31、is using liquefied natural gas (LNG) as a source of gaseous fuel for its engine3.18natural gas detectordevice for sensing the presence of natural gas3.19natural gas vehicleNGVroad vehicle powered by natural gas3.20pressure regulatordevice used to control the delivery pressure of gaseous fuel to the
32、engine3.21tank pressure regulatorpressure regulator for controlling pressure in the fuel tank3.22rigid fuel linetubing which has been designed not to flex in normal operation and through which natural gas flows3.23tank pressure gaugepressurized device which indicates the pressure of the gas space in
33、 the fuel tank3.24test pressurepressure to which a component is taken during acceptance testing3.25valvedevice by which the flow of a fluid can be controlled3.36manual valvevalve which is operated manually3.37automatic shut-off valvevalve which is not operated manually and is used on vaporized gas o
34、nly for emergency operation3.38check valveautomatic valve which allows gas to flow in only one direction3.39excess flow valvevalve which automatically shuts off or limits the gas flow when the flow exceeds a set design value3.40pressure relief valvePRVdevice which prevents a pre-determined upstream
35、pressure being exceeded3.41service valvemanual valve which is closed only when servicing the vehicle ISO 2014 All rights reserved 3BS ISO 12614-1:2014ISO 12614-1:2014(E)3.42working pressuremaximum pressure to which a component is designed to be subjected to and which is the basis for determining the
36、 strength of the component under consideration4 Construction and assembly4.1 For the description of components, see Annex A.4.2 Components shall be made of materials suitable for use with liquefied natural gas.4.3 Jointing components shall provide gas-tight sealing performance. Where joints are requ
37、ired to be disassembled, it is recommended that any tapered thread fittings be replaced.4.4 Components shall be suitable for service within a temperature range as specified below:4.4.1 Components, which are not intended to be used at temperatures less than 40 C, shall be designed and specified in ac
38、cordance with ISO 15500.4.4.2 Components, which are intended to be used at temperatures less than 40 C, shall be suitable for service within a temperature range of 162 C to 85 C.4.4.3 Components, which are intended to be used at temperatures less than 40 C, when placed in the engine compartment, sha
39、ll be suitable for service within a range of 162 C to 120 C.4.5 All non-metallic materials shall comply with the oxygen ageing test specified in ISO 12614-2.4.6 All non-metallic materials in contact with natural gas shall comply with the non-metallic material immersion test specified in ISO 12614-2.
40、4.7 All components subject to weather exposure and other corrosive conditions shall be made of corrosion-resistant material or otherwise protected.4.8 It is recognized that multifunctional components have the functions of several components where the functions are as defined in ISO 12614-3 and subse
41、quent parts of this International Standard. Such multifunctional components shall be examined for conformance to ISO 12614-3 and subsequent parts of this International Standard and tested according to the appropriate functional tests.4.9 Fuel flow shut-off valve shall be fail-safe, closing with the
42、loss of actuating energy.5 Electrical equipment 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 mec
43、hanical strength, insulation, and current carrying capacity, in accordance with ISO 6722 (all parts).For example, possible explosion zones shall be taken into consideration with the component specifications according to existing International Standards.4 ISO 2014 All rights reservedBS ISO 12614-1:20
44、14ISO 12614-1:2014(E)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 strength, heat-resistant properties, th
45、e 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, maintenance, and safe operation, shal
46、l 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 This information shall be in a form easily understood in the country of dest
47、ination.7 MarkingThe components shall include the following information as required:a) the manufacturers or agents name, trademark, or symbol;b) the model designation (part number);c) the working pressure or pressure and temperature range;d) the direction of flow (when necessary for correct installa
48、tion);e) the type of fuel;f) electrical ratings;g) the symbol of the certification agency;h) the type approval number;i) the serial number or date code;j) reference to this part of ISO 12614 (i.e. ISO 12614-1).NOTE 1 Specific information required for each component can be found in ISO 12614-3 and su
49、bsequent parts of this International Standard.NOTE 2 This information can be provided by a suitable identification code on at least one part of the component when it consists of more than one part. ISO 2014 All rights reserved 5BS ISO 12614-1:2014ISO 12614-1:2014(E)Annex A (informative) Construction and assemblyKey1 fill check valve 9 heat exchanger vaporizer2 fuel shut-off valve 10 fill fitting3 excess flow valve 11 automatic fuel shut-off valve4 vapour shut-off valve 12 tank pressure
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