1、BSI Standards PublicationBS ISO 12614-11:2014Road vehicles Liquefiednatural gas (LNG) fuel systemcomponentsPart 11: FittingsBS ISO 12614-11:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO12614-11:2014.The UK participation in its preparation was entrusted t
2、o 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 correctapp
3、lication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77158 3ICS 43.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Commi
4、ttee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 12614-11:2014 ISO 2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 11: FittingsVhicules routiers quipements pour vhicules utilisant le gaz naturel liqufi (GNL) comme combustible Partie 11: Racco
5、rdsINTERNATIONAL STANDARDISO12614-11First edition2014-07-01Reference numberISO 12614-11:2014(E)BS ISO 12614-11:2014ISO 12614-11:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or
6、 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 of the requester.ISO cop
7、yright 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 12614-11:2014ISO 12614-11:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and defin
8、itions . 14 Marking 25 Construction and assembly . 26 Test 26.1 Applicability 26.2 Hydrostatic strength 36.3 Continued operation 36.4 Vibration resistance 36.5 Pull-off 4BS ISO 12614-11:2014ISO 12614-11:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation
9、 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 right to be represented on that committee.
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11、 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 rules of the ISO/IEC Directives, Part 2 (se
12、e 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 identified during the development of the docum
13、ent 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 on the meaning of ISO specific terms and e
14、xpressions 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
15、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 methods Part 3: Check valve Part 4: Manual valve Par
16、t 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 material other than stainless steel Part 13: Pressu
17、re control regulator Part 14: Differential pressure fuel content gauge Part 15: Capacitance fuel content gaugeiv ISO 2014 All rights reservedBS ISO 12614-11:2014ISO 12614-11:2014(E) Part 16: Heat exchanger - vaporizer Part 17: Natural gas detector Part 18: Gas temperature sensor ISO 2014 All rights
18、reserved vBS ISO 12614-11:2014BS ISO 12614-11:2014Road vehicles Liquefied natural gas (LNG) fuel system components Part 11: Fittings1 ScopeThis part of ISO 12614 specifies tests and requirements for the fittings, a liquefied natural gas fuel system component intended for use on the types of motor ve
19、hicles 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 covered herei
20、n 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 upon a working
21、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 following doc
22、uments, 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, Road vehicles T
23、ypes 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 definitionsFor the
24、 purposes of this document, the terms and definitions given in ISO 12614-1 apply.1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.INTERNATIONAL STANDARD ISO 12614-11:2014(E) ISO 2014 All rights reserved 1BS ISO 12614-11:2014ISO 12614-11:2014(E)4 MarkingMarking of the component shall provide sufficient i
25、nformation 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 additional markings are recommended:a) the direction of flow (when necessary for cor
26、rect 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 this part of ISO 12614 (i.e. ISO 12614-11:2014).NOTE This information can be provided by a suitable ide
27、ntification code on at least one part of the component when it consists of more than one part.5 Construction and assemblyThe fittings shall comply with the applicable provisions of ISO 12614-1 and ISO 12614-2 and with the tests specified in Clause 6 of this part of ISO 12614-1.The fittings shall be
28、compatible with rigid fuel line.6 Test6.1 ApplicabilityThe tests required to be carried out are indicated in Table 1.2 ISO 2014 All rights reservedBS ISO 12614-11:2014ISO 12614-11:2014(E)Table 1 Tests applicableTest ApplicableTest procedure as required by ISO 126142Specific test requirements of this
29、 part of ISO 12614Hydrostatic strength X X X (see 6.2)Leakage X XExcess torque resistance X XBending moment X XContinued operation X X X (see 6.3)Corrosion resistance X XOxygen ageing X XElectrical over voltagesNon-metallic material immersion X XVibration resistance X X (see 6.4)Pull-off X X (see 6.
30、5)Brass material compatibility X X6.2 Hydrostatic strengthThe fitting shall be tested according to the procedure for testing hydrostatic strength specified in ISO 12614-2.The test pressure shall be four times the working pressure.NOTE The higher hydrostatic test pressure for the rigid fuel line than
31、 the other ISO 12614 series components is due to the necessary provisions to cope for eventual damage or abrasions under normal operation.6.3 Continued operation6.3.1 Subject the fitting to continued operation for a total of 100 cycles. The fitting shall only be tested while connected with a rigid f
32、uel line.6.3.2 Fittings shall be subjected to 25 connection/disconnection cycles.6.3.3 Perform the leakage test in accordance with 6.3.6.4 Vibration resistanceVibrate the fittings, pressurized to its working pressure and sealed at both ends, for 30 min along each of the three orthogonal axes at the
33、most severe resonant frequencies determined as follows: by an acceleration of 1,5 g; within a sinusoidal frequency range of 10 Hz to 500 Hz; with a sweep time of 10 min.At the completion of the test, the fittings shall not show any indication of fatigue or component damage and shall meet the leakage
34、 test requirements.Following the vibration testing, perform the hydrostatic test in accordance with 6.2. ISO 2014 All rights reserved 3BS ISO 12614-11:2014ISO 12614-11:2014(E)6.5 Pull-offTest the fitting attached to its rigid fuel line and coupled to its mating part or parts, according to the follow
35、ing procedure and acceptance criterion. Secure the subject specimen in an appropriate test fixture, then statically apply a tensile load along the rigid fuel line axis at a maximum rate of 250 N/min until the rigid fuel line separates from the fitting.The force, F, in Newtons, required to pull apart
36、 the rigid fuel line from its fitting shall be in minimum and calculated asFdP=()/pi210 (1)whered is the internal diameter, in millimetres;P is the pressure, in bar.Formula (1) already includes a safety factor of four.4 ISO 2014 All rights reservedBS ISO 12614-11:2014BS ISO 12614-11:2014ISO 12614-11
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