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1、Reference number ISO 15500-3:2001(E) ISO 2001 INTERNATIONAL STANDARD ISO 15500-3 First edition 2001-01-15 Road vehicles Compressed natural gas (CNG) fuel system components Part 3: Check valve Vhicules routiers Composants des systmes de combustible gaz naturel comprim (GNC) Partie 3: Valve de contrle
2、 ISO 15500-3:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In do
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5、s given below. ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs m
6、ember body in the country of the requester. ISO copyright office Case postale 56 ? CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2001 All rights reserved ISO 15500-3:2001(E) ISO 2001 All rights reservediii Foreword
7、ISO (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
8、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 matters of elect
9、rotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires a
10、pproval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 15500 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. InternationalStandardISO 15500
11、-3waspreparedbyTechnicalCommitteeISO/TC 22,Roadvehicles, Subcommittee SC 25, Road vehicles using natural gas. ISO 15500 consists of the following parts, under the general title Road vehicles Compressed natural gas (CNG) fuel system components: ?Part 1: General requirements and definitions ?Part 2: P
12、erformance 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: Pressure indicator ?Part 9: Pressure regulator ?Part 10: Gas-flow adjuster ?Part 11: Gas/air mixer ?Part 12: Pressure relief valve (PR
13、V) ?Part 13: Pressure relief device (PRD) ?Part 14: Excess flow valve ?Part 15: Gas-tight housing and ventilation hose ISO 15500-3:2001(E) iv ISO 2001 All rights reserved ?Part 16: Rigid fuel line ?Part 17: Flexible fuel line ?Part 18: Filter ?Part 19: Fittings INTERNATIONAL STANDARDISO 15500-3:2001
14、(E) ISO 2001 All rights reserved1 Road vehicles Compressed natural gas (CNG) fuel system components Part 3: Check valve 1Scope This part of ISO 15500 specifies tests and requirements for the check valve, a compressed natural gas fuel system component intended for use on the types of motor vehicles d
15、efined in ISO 3833. This part of ISO 15500 is applicable to vehicles using natural gas in accordance with ISO 15403 (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 vapo
16、rizer; b)fuel containers; c)stationary gas engines; d)container mounting hardware; e)electronic fuel management; f)refuelling receptacles. NOTE 1It is recognized that miscellaneous components not specifically covered herein can be examined to meet the criteria of this part of ISO 15500 and tested ac
17、cording to the appropriate functional tests. NOTE 2All references to pressure in this part of ISO 15500 are to be considered gauge pressures unless otherwise specified. NOTE 3This 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
18、service pressures can be accommodated by adjusting the pressure by the appropriate factor (ratio). For example, a 25 MPa (250 bar) service pressure system will require pressures to be multiplied by 1,25. 2Normative references The following normative documents contain provisions which, through refere
19、nce in this text, constitute provisions of this part of ISO 15500. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 15500 are encouraged to investigate the possibility of applying the mos
20、t recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3833, Road vehicles Types Terms and definitions. 1)1 bar =
21、 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2 ISO 15500-3:2001(E) 2 ISO 2001 All rights reserved ISO 15403, Natural gas Designation of the quality of natural gas for use as a compressed fuel for vehicles. ISO 15500-1, Road vehicles Compressed natural gas (CNG) fuel system components Part 1: General requirements
22、 and definitions. ISO 15500-2, Road vehicles Compressed natural gas (CNG) fuel system components Part 2: Performance and general test methods. 3Terms and definitions For the purposes of this part of ISO 15500, the terms and definitions given in ISO 15500-1 apply. 4Marking Marking of the component sh
23、all 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 service pressure or pressure and temperature range. The following additional markings are recommended: d)the direction of flow
24、 (when necessary for correct installation); e)the type of fuel; f)electrical ratings (if applicable); 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 15500. NOTEThis information can be provided by a suitable iden
25、tification code on at least one part of the component when it consists of more than one part. 5Construction and assembly The check valve shall comply with the applicable provisions of ISO 15500-1 and ISO 15500-2, and with the tests specified in clause 6 of this part of ISO 15500. 6Tests 6.1Applicabi
26、lity The tests required to be carried out are indicated in Table 1. ISO 15500-3:2001(E) ISO 2001 All rights reserved3 Table 1 Tests applicable TestApplicableTest procedure as required by ISO 15500-2 Specific test requirements of this part of ISO 15500 Hydrostatic strengthXXX (see 6.2) LeakageXXX (se
27、e 6.3) Excess torque resistance Xa X Bending momentXX Continued operationXXX (see 6.4) Corrosion resistanceXX Oxygen ageingXX Electrical overvoltages Non-metallic synthetic immersionXX Vibration resistanceXX Brass material compatibilityXX a Not applicable for check valves built into other components
28、. 6.2Hydrostatic strength Test the check valve according to the procedure for testing hydrostatic strength specified in ISO 15500-2. The test pressure shall be 100 MPa (1 000 bar). 6.3Leakage Test the check valve at the temperatures and pressures given in Table 2. Table 2 Test temperatures and press
29、ures Pressure MPa bar Temperature C FirstSecond ?4015 1500,5 5 200,5 5 85 to 1201 10 30 300 6.4Continued operation The check valve shall be capable of withstanding 20 000 cycles of operation and 24 h of chatter flow when submitted to the following test procedure. a)Connect the check valve to a test
30、fixture and apply a 25 MPa (250 bar) pressure to the check valves inlet, then vent pressure from its outlet. Lower the pressure on the check valves outlet side to between 0 and a maximum of 12,5 MPa (125 bar) prior to the next cycle. ISO 15500-3:2001(E) 4 ISO 2001 All rights reserved b)Following 20
31、000 cycles of operation, subject the check valve to 24 hours of chatter flow at a flow rate that causes the most chatter. After this test, the check valve shall comply with the leakage test according to 6.3. Failure in any sense during the procedure shall constitute a failure of the check valve. All parts shall remain in position and function properly after this test. ISO 15500-3:2001(E) ICS 43.060.40 Price based on 4 pages ISO 2001 All rights reserved -,-,-
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