1、BSI Standards PublicationBS ISO 12614-5:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 5: Tank pressure gaugeBS ISO 12614-5:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12614-5:2014.The UK participation in its preparation was ent
2、rusted 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 responsible for its co
3、rrectapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77151 4ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strate
4、gy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-5:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 5: Tank pressure gaugeVhicules routiers quipements pour vhicules utilisant le gaz naturel liqufi (GNL) comme combustible
5、 Partie 5: Manomtre du rservoirINTERNATIONAL STANDARDISO12614-5First edition2014-07-01Reference numberISO 12614-5:2014(E)BS ISO 12614-5:2014ISO 12614-5:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publicat
6、ion 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 address below or ISOs member body in the country
7、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 12614-5:2014ISO 12614-5:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative referen
8、ces 13 Terms and definitions . 14 Marking 25 Construction and assembly . 26 Test 26.1 Applicability 26.2 Hydrostatic strength 36.3 Leakage 36.4 Continued operation 3BS ISO 12614-5:2014ISO 12614-5:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of nat
9、ional 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 right to be represented on that committee. Interna
10、tional 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 procedures used to develop this document and those intend
11、ed 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 rules of the ISO/IEC Directives, Part 2 (see www.i
12、so.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 identified during the development of the document wi
13、ll 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 on the meaning of ISO specific terms and expres
14、sions 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 ISO/TC 22, Road vehicles, Subcommittee SC 25, V
15、ehicles 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 methods Part 3: Check valve Part 4: Manual valve Part 5:
16、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 material other than stainless steel Part 13: Pressure co
17、ntrol regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-5:2014ISO 12614-5:2014(E) Part 16: Heat exchanger - vaporizer Part 17: Natural gas detector Part 18: Gas temperature sensor ISO 2014 All rights reserve
18、d vBS ISO 12614-5:2014BS ISO 12614-5:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 5: Tank pressure gauge1 ScopeThis part of ISO 12614 specifies tests and requirements for the tank pressure gauge, a liquefied natural gas fuel system component intended for use on the types
19、 of motor vehicles defined in ISO 3833.This part of ISO 12614 is not applicable to the following:a) fuel containers;b) stationary gas engines;c) container mounting hardware;d) electronic fuel management;e) refueling receptacles.NOTE 1 It is recognized that miscellaneous components not specifically c
20、overed herein can be examined to meet the criteria of this part of ISO 12614 and tested according to the appropriate functional tests.NOTE 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 upo
21、n a working pressure for natural gas as a fuel of 1,6 MPa 16 bar1). Other working pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, 2 MPa (20 bar) working pressure system will require pressures to be multiplied by 1,25.2 Normative referencesThe f
22、ollowing documents, in 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 3833, Roa
23、d vehicles Types Terms and definitionsISO 12614-1, Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and definitionsISO 12614-2, Road vehicles Liquefied natural gas (LNG) fuel system components Part 2: Performance and general test methods3 Terms and defini
24、tionsFor the purposes of this document, the terms and definitions given in ISO 12614-1 and the following apply.1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.INTERNATIONAL STANDARD ISO 12614-5:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-5:2014ISO 12614-5:2014(E)3.1tank pressure gaugepart of the
25、 system that is exposed to working pressure4 MarkingMarking 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 designation (part number);c) the working pressure or pressure and temperature r
26、ange.The following additional markings are recommended:a) the direction of flow (when necessary for correct installation);b) the type of fuel;c) electrical ratings (if applicable);d) the symbol of the certification agency;e) the type approval number;f) the serial number or date code;g) reference to
27、this part of ISO 12614 (i.e. ISO 12614-5).NOTE 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.5 Construction and assembly5.1 The pressure indicator shall comply with the applicable provisions of ISO 1261
28、4-1 and ISO 12614-2 and with the tests specified in Clause 6 of this part of ISO 12614.5.2 The tank pressure gauge shall be capable of displaying at least 120 % of the working pressure.5.3 If the tank pressure gauge is a gauge, it shall be equipped with a shatter-proof lens and possess a means of pr
29、essure relief located in the rear of its body.Where a pressure gauge is located within the driver or passenger compartment or other insufficiently ventilated space, the pressure gauge shall be enclosed in a gas-tight housing in such a way that any gas leakage is vented and directed to the outside of
30、 the vehicle. When the pressure gauge is self-venting, the gas-tight housing shall enclose the connections, pipework, and venting orifices.6 Test6.1 ApplicabilityThe tests required to be carried out are indicated in Table 1.2 ISO 2014 All rights reservedBS ISO 12614-5:2014ISO 12614-5:2014(E)Table 1
31、Tests applicableTest ApplicableTest procedure as required by ISO 12614-2Specific test requirements of this part of ISO 12614Hydrostatic strength X X X (see 6.2)Leakage X X X (see 6.3)Excess torque resistance X XBending moment X XContinued operation X X (see 6.4)Corrosion resistance X XOxygen ageing
32、X XElectrical over voltagesNon-metallic material immersion X XVibration resistance X XBrass material compatibility X XInsulation resistanceMinimum opening voltage6.2 Hydrostatic strengthTest the tank pressure gauge according to the procedure for testing hydrostatic strength specified in ISO 12614-2.
33、 The test pressure shall be 2,5 times the working pressure.6.3 LeakageTest the tank pressure gauge at the temperatures and pressures given in Table 2.Table 2 Test temperatures and pressuresTemperature CPressure Factor x Working PressureFirst Second162 1,0 x WP 0,25 x WP20 0,25 x WP1,5 x WP85 or 120
34、0,25 x WP6.4 Continued operation6.4.1 Test the tank pressure gauge in accordance with the procedure for testing continued operation given in ISO 12614-2, for 7 000 cycles; a cycle consists of pressurization to working pressure, followed by depressurization to less than 50 % of the working pressure.6
35、.4.2 Perform the leakage test in accordance with 6.3 of this part of ISO 12614. ISO 2014 All rights reserved 3BS ISO 12614-5:2014ISO 12614-5:2014(E) ISO 2014 All rights reservedICS 43.060.40Price based on 3 pagesThis page deliberately left blankBSI is the national body responsible for preparing Brit
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