BS ISO 15500-8-2015 Road vehicles Compressed natural gas (CNG) fuel system components Pressure indicator《道路车辆 压缩天然气 (CNG) 燃料系统部件 压力指示器》.pdf

1、BSI Standards PublicationBS ISO 15500-8:2015Road vehicles Compressednatural gas (CNG) fuel systemcomponentsPart 8: Pressure indicatorBS ISO 15500-8:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 15500-8:2015.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 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 79968 6ICS 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 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 15500-8:2015 ISO 2015Road vehicles Compressed natural gas (CNG) fuel system components Part 8: Pressure indicatorVhicules routiers Composants des systmes de combustible gaz naturel compr

5、im (GNC) Partie 8: Indicateur de pressionINTERNATIONAL STANDARDISO15500-8Second edition2015-12-01Reference numberISO 15500-8:2015(E)BS ISO 15500-8:2015ISO 15500-8:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwis

6、e 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 address belo

7、w 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 15500-8:2015ISO 15500-8:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and

8、definitions . 14 Marking 25 Construction and assembly . 26 Tests . 26.1 Applicability 26.2 Hydrostatic strength 36.3 Leakage 36.4 Continued operation 36.5 Insulation resistance 46.6 Minimum operating voltage 4Bibliography 5 ISO 2015 All rights reserved iiiContents PageBS ISO 15500-8:2015ISO 15500-8:

9、2015(E)ForewordISO (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 whi

10、ch a technical committee 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 m

11、atters of electrotechnical 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

12、document was drafted 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 a

13、ll such patent rights. 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 a

14、nd does not constitute 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 i

15、nformationThe committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific aspects for gaseous fuels.This second edition cancels and replaces the first edition (ISO 15500-8:2001), which has been technically revised.ISO 15500 consists of the following parts, under

16、 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 Part 8:

17、Pressure indicator Part 9: Pressure regulator Part 10: Gas-flow adjuster Part 11: Gas/air mixer Part 12: Pressure relief valve (PRV) Part 13: Pressure relief device (PRD)iv ISO 2015 All rights reservedBS ISO 15500-8:2015ISO 15500-8:2015(E) Part 14: Excess flow valve Part 15: Gas-tight housing and ve

18、ntilation 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 15500-8:2015BS ISO 15500-8:2015Road vehicles Compressed natural gas (CNG) fuel

19、 system components Part 8: Pressure indicator1 ScopeThis part of ISO 15500 specifies tests and requirements for the pressure indicator, a compressed natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833.This part of ISO 15500 is applicable to vehicles

20、using natural gas in accordance with ISO 15403-1 (mono-fuel, bi-fuel, or dual-fuel applications). It is not applicable to the following:a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer;b) fuel containers;c) stationary gas engines;d) container mo

21、unting 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 the criteria of this part of ISO 15500 and tested according to the appropriate functional tests.NOTE 2 All references

22、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 a fuel of 20 MPa 200 bar1) settled at 15 C. Other service pressures can be accommodated by adjusting the pressure by

23、 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, in whole or in part, are normatively referenced in this document and are indispensable for its application. For date

24、d references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 15500-1, Road vehicles Compressed natural gas (CNG) fuel system components Part 1: General requirements and definitionsISO 15500-2:2), Road vehic

25、les Compressed natural gas (CNG) 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 15500-1 apply.1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.2) To be published. (Revision of ISO 15500-2

26、2012)INTERNATIONAL STANDARD ISO 15500-8:2015(E) ISO 2015 All rights reserved 1BS ISO 15500-8:2015ISO 15500-8:2015(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 design

27、ation (part number);c) the working pressure or pressure and temperature range.The following additional markings are recommended: the direction of flow (when necessary for correct installation); the type of fuel; electrical ratings (if applicable); the symbol of the certification agency; the type app

28、roval number; the serial number or date code; a reference to this part of ISO 15500.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 shal

29、l comply with the applicable provisions of ISO 15500-1 and ISO 15500-2 and with the tests specified in Clause 6. Tolerances should follow the specifications of ISO 15500-2.5.2 The pressure indicator shall be capable of displaying at least 1,5 times the service pressure.5.3 If the pressure indicator

30、is a gauge, it shall be equipped with a shatter-proof lens and possess an external means of pressure relief. Potential release shall not be directed to the front of the gauge.6 Tests6.1 ApplicabilityThe tests required to be carried out are indicated in Table 1.2 ISO 2015 All rights reservedBS ISO 15

31、500-8:2015ISO 15500-8:2015(E)Table 1 Tests applicableTest Applicable Test procedure as required by ISO 15500-2Specific test requirements of this part of ISO 15500Hydrostatic 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)

32、Corrosion resistance X XOxygen ageing X XOzone ageing X XHeat ageing X XAutomotive fluids X XElectrical over-voltages XaXNon-metallic material immersion X XVibration resistance X XBrass material compatibility X XInsulation resistance XaX (see 6.5)Minimum operating voltage XaX (see 6.6)aApplicable on

33、ly if the pressure indicator has an electrical or electronic component.6.2 Hydrostatic strengthTest the pressure indicator according to the procedure for testing hydrostatic strength specified in ISO 15500-2. The test pressure shall be 2,5 times the working pressure.6.3 LeakageTest the pressure indi

34、cator at the temperatures and pressures given in Table 2.Table 2 Test temperatures and pressuresTemperature CPressure MPa (bar)First Test Second Test40 or 20 0,75 WP 0,025 WP20 0,025 WP1,5 WP85 or 120 0,05 WP6.4 Continued operation6.4.1 Test the pressure indicator in accordance with the procedure fo

35、r testing continued operation given in ISO 15500-2:, Clause 9 for 20 000 cycles; a cycle consists of pressurization to working pressure, followed by depressurization to less than 0,5 times the working pressure.6.4.2 Perform the leakage test in accordance with 6.3. ISO 2015 All rights reserved 3BS IS

36、O 15500-8:2015ISO 15500-8:2015(E)6.5 Insulation resistanceThis test is designed to check for a potential failure of the insulation between the two-pin coil assembly and the pressure indicator casing.Apply 1 000 V d. c. between one of the connector pins and the housing of the pressure indicator for a

37、t least 2 s. The minimum allowable resistance shall be 240 k.6.6 Minimum operating voltageThe minimum operating voltage at room temperature shall be 8 V for a 12 V system and 16 V for a 24 V system.The component shall be pressurized at 0,75 times working pressure during the test and the reading shal

38、l be within the manufacturers specified tolerance.4 ISO 2015 All rights reservedBS ISO 15500-8:2015ISO 15500-8:2015(E)Bibliography1 ISO 3833, Road vehicles Types Terms and definitions2 ISO 15403-1, Natural gas Natural gas for use as a compressed fuel for vehicles Part 1: Designation of the quality3

39、ISO/TR 15403-2, Natural gas - Natural gas for use as a compressed fuel for vehicles Part 2: Specification of the quality ISO 2015 All rights reserved 5BS ISO 15500-8:2015ISO 15500-8:2015(E) ISO 2015 All rights reservedICS 43.060.40Price based on 5 pagesThis page deliberately left blankBSI is the nat

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