1、BSI Standards PublicationBS ISO 12614-14:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 14: Differential pressure fuel contentgaugeBS ISO 12614-14:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO12614-14:2014.The UK participation in
2、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 contract. Users are
3、 responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77161 3ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStan
4、dards Policy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-14:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 14: Differential pressure fuel content gaugeVhicules routiers quipements pour vhicules utilisant
5、 le gaz naturel liqufi (GNL) comme combustible Partie 14: Jauge de carburant manomtre diffrentielINTERNATIONAL STANDARDISO12614-14First edition2014-07-01Reference numberISO 12614-14:2014(E)BS ISO 12614-14:2014ISO 12614-14:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All
6、 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 requested fr
7、om either ISO at the address 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 12614-14:2014ISO 12614-14:2014(E) ISO 2014 All r
8、ights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 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 3Bibliography 4BS ISO 12614-14:2014ISO 12614-14:2014(E)ForewordI
9、SO (the International Organization 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 c
10、ommittee has been established has 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 electr
11、otechnical standardization.The procedures 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 dra
12、fted 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 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 r
13、ights. 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 received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not cons
14、titute an endorsement.For an explanation 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 co
15、mmittee responsible for this document 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
16、: Performance and general test methods Part 3: Check valve Part 4: Manual valve Part 5: Tank pressure gauge Part 6: Pressure 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
17、Part 12: Rigid fuel line in copper and its alloys Part 13: Pressure control regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-14:2014ISO 12614-14:2014(E) Part 16: Heat exchanger vaporizer Part 17: Natural ga
18、s detector Part 18: Gas temperature sensor ISO 2014 All rights reserved vBS ISO 12614-14:2014BS ISO 12614-14:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 14: Differential pressure fuel content gauge1 ScopeThis part of ISO 12614 specifies tests and requirements for the di
19、fferential pressure fuel content gauge, a liquefied natural gas fuel system component intended for use on the types 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) electron
20、ic fuel management;e) refueling 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.NOTE 2 All references to pressure in this part of
21、ISO 12614 are to be considered gauge pressures unless otherwise specified.NOTE 3 This part of ISO 12614 is based upon a maximum working pressure for natural gas as fuel of 1,6 MPa (16 bar). (1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.) Other working pressures can be accommodated by adjusting the pres
22、sure by 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
23、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 12614-1, Road vehicles Liquefied natural gas (LNG) fuel system components Part 1: General requirements and definitionsISO 12614-2, Road vehi
24、cles Liquefied natural gas (LNG) 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 12614-1 apply.INTERNATIONAL STANDARD ISO 12614-14:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-14
25、:2014ISO 12614-14:2014(E)4 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 range.The following
26、 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) a reference to this part of ISO
27、 12614 (i.e. ISO 12614-14:2014).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 Pressure transducers and gauges shall comply with the applicable provisions of ISO 12614
28、-1 and ISO 12614-2, and with the tests specified in Clause 6.5.2 If the differential pressure fuel content gauge is a gauge, it shall be equipped with a shatter-proof lens and possess a means of pressure relief located in the rear of its body.6 Test6.1 ApplicabilityThe tests required to be carried o
29、ut are indicated in Table 1.Table 1 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 X (see 6.4)
30、Corrosion resistance X XOxygen ageing X XElectrical overvoltages X X2 ISO 2014 All rights reservedBS ISO 12614-14:2014ISO 12614-14:2014(E)Test ApplicableTest procedure as required by ISO 12614-2Specific test requirements of this part of ISO 12614Non-metallic material immersion X XVibration resistanc
31、e X XBrass material compatibility X X6.2 Hydrostatic strengthTest the differential pressure fuel content gauge according to the procedure for testing hydrostatic strength specified in ISO 12614-2. The test pressure shall be 2,5 times the working pressure.6.3 LeakageTest the differential pressure fue
32、l content gauge at the temperatures and pressures given in Table 2.Table 2 Test temperatures and pressuresTemperature CPressure (factor working pressure)First Second162 1,0 WP 0,25 WP20 0,25 WP1,5 WP85 or 120 0,25 WP6.4 Continued operation6.4.1 Test the differential pressure fuel content gauge in ac
33、cordance with the procedure for testing continued operation given in ISO 12614-2, for 20 000 cycles; a cycle consists of pressurization to working pressure, followed by depressurization to less than 0,4 MPa (4 bar).6.4.2 Perform the leakage test in accordance with 6.3.Table 1 (continued) ISO 2014 Al
34、l rights reserved 3BS ISO 12614-14:2014ISO 12614-14:2014(E)Bibliography1 ISO 3833, Road vehicles Types Terms and definitions4 ISO 2014 All rights reservedBS ISO 12614-14:2014BS ISO 12614-14:2014ISO 12614-14:2014(E) ISO 2014 All rights reservedICS 43.060.40Price based on 4 pagesThis page deliberately
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