1、 ISO 2016 Road vehicles Compressed gaseous hydrogen (CGH2) and hydrogen/ natural gas blend fuel system components Part 2: Performance and general test methods AMENDMENT 1 Vhicules routiers Composants des circuits dalimentation pour hydrogne gazeux comprim (CGH2) et mlanges de gaz naturel et hydrogne
2、 Partie 2: Performance mthodes dessai en gnral AMENDEMENT 1 INTERNATIONAL STANDARD ISO 12619-2 First edition 2014-06-15 Reference number ISO 12619-2:2014/Amd.1:2016(E) AMENDMENT 1 2016-05-15 ISO 12619-2:2014/Amd.1:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2016, Publishe
3、d in Switzerland All 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
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11、on The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific aspects for gaseous fuels. ISO 12619 consists of the following parts, under the general title Road vehicles Compressed Gaseous Hydrogen (CGH2) and Hydrogen/Natural gas blends fuel system componen
12、ts: Part 1: General requirements and definitions Part 2: Performance and general test methods Part 3: Pressure regulator Part 4: Check valve Part 5: Manual cylinder valve Part 6: Automatic valve ISO 2016 All rights reserved iii Road vehicles Compressed gaseous hydrogen (CGH2) and hydrogen/natural ga
13、s blend fuel system components Part 2: Performance and general test methods AMENDMENT 1 Page 10, 22.2 Add the following clauses after 22.2: 23 Material requirements Materials normally in contact with hydrogen shall be determined to be acceptable in hydrogen service, with consideration of hydrogen em
14、brittlement and hydrogen accelerated fatigue. The performance tests cannot guarantee that all cases and conditions of hydrogen service will be validated, so it is still incumbent on the manufacturer to carefully screen materials of construction for their intended use. Materials and design shall be s
15、uch that there will be no significant change in the functioning of the component, deformation or mechanical change in the component, and no harmful corrosion, deformation, or deterioration of the materials when subject to the service conditions provided in ISO 12619-1, 4.4. NOTE Material performance
16、 data in hydrogen environments can be found in the Sandia National Laboratory Technical Reference for Hydrogen Compatibility of Materials or ANSI/AIAA G-095, ANSI/CSA CHMC 1, ASME B31.12, and SAE J2579, Appendix B. Non-metallic materials normally in contact with hydrogen shall be determined to be ac
17、ceptable in hydrogen service. Consideration shall be given to the fact that hydrogen diffuses through these materials more easily than through metals; therefore, the suitability of materials shall be verified. Non-metallic materials shall retain their mechanical stability with respect to strength (f
18、atigue properties, endurance limit, creep strength) when exposed to the full range of service conditions and lifetime as specified by the manufacturer. Materials shall be sufficiently resistant to the chemical and physical action of the fluids that they contain and to environmental degradation. The
19、chemical and physical properties necessary for operational safety shall not be significantly affected within the scheduled lifetime of the equipment unless replacement is foreseen; specifically, when selecting materials and manufacturing methods, due account shall be taken of the materials corrosion
20、 and wear resistance, electrical conductivity, impact strength, aging resistance, the effects of temperature variations, the effects arising when materials are put together (for example, galvanic corrosion), the effects of ultraviolet radiation, and the degradation effects of hydrogen on the mechani
21、cal performance of a material. 24 Ultraviolet resistance of external surfaces 24.1 General The external non-metallic surfaces, including organic coatings, of the component shall be evaluated for resistance to ultraviolet effects using a minimum 1 000 h exposure using a UVA 340 lamp in accordance wit
22、h ISO 4892-3. The inlet and outlet connections of the component shall be connected or capped in accordance with the manufacturers installation instructions. ISO 12619-2:2014/Amd.1:2016(E) ISO 2016 All rights reserved 1 ISO 12619-2:2014/Amd.1:2016(E) 24.2 Pass criteria There shall be no evidence of b
23、listering, cracking, chalking, or softening. If the non-metallic material is integral to pressure containment or the function of the device, then, at the conclusion of this test, the device shall meet the requirements of Clauses 5 and 6. 2 5 A u t o m o t i v e f l u i d e x p o s u r e 25.1 General
24、 External portions of components shall be able to withstand exposure to the following fluids without mechanical degradation. Resistance may be determined by the test in 25.2, by comparable published data or by known properties (e.g. 300 series stainless steel). The decision about the applicability o
25、f test data and known properties shall be at the discretion of the independent inspection or test agency. 25.2 Method The external surfaces of the component shall be exposed to the following test. The inlet and outlet connections of the component shall be connected or capped in accordance with the c
26、omponent manufacturers installation instructions. The component shall be exposed for at ambient temperature by spraying the exterior of the component once per hour, 24 times, over a period of up to three days (e.g. three 8 h shifts over three days or 24 h straight). Alternatively, the component may
27、be immersed in the solution for 24 h. In the immersion method, the fluid shall be replenished as needed to assure complete exposure for the duration of the test. A distinct test shall be performed with each of the three fluids specified in 25.3. One component may be used for all three exposures sequ
28、entially. 25.3 Fluids The following fluids shall be used: a) Sulfuric acid: 19 % solution by volume in water; b) Ethanol/gasoline: 5/95 % concentration of M5 fuel meeting the requirements of ASTM D4814; c) Windshield washer fluid: 50 % by volume solution of methanol and water. 25.4 Pass criteria Aft
29、er exposure to each chemical, the component shall be wiped off and rinsed with water and examined. The component shall not show signs of mechanical degradation that could impair the function of the component such as cracking, softening, or swelling. Cosmetic changes such as pitting or staining are n
30、ot considered failures. At the conclusion of all exposures, the components(s) shall meet the leakage requirements of Clause 6 and hydrostatic strength requirements of Clause 5. 26 N-pentane Resistance to n-pentane according to ISO 1817 with the following conditions: a) Medium: n-pentane; b) Temperat
31、ure: 23 C (tolerance according to ISO 1817); c) Immersion period: 72 h. Requirements: Maximum change in volume: 20 %; Maximum change in tensile strength: 25 %; Maximum change in elongation at break: 30 %.2 ISO 2016 All rights reserved ISO 12619-2:2014/Amd.1:2016(E) After storage in air with a temper
32、ature of 40 C for 48 h, the mass compared with the original value may not decrease more than 5 %. 27 Heat ageing 27.1 The test has to be done in compliance with ISO 188. The test piece has to be exposed to air at a temperature equal to the maximum operating temperature for 168 h. 27.2 The allowable
33、change in tensile strength should not exceed +25 %. The allowable change in ultimate elongation shall not exceed the following values: a) Maximum increase: 10 %; b) Maximum decrease: 30 %. Page 11, Bibliography Add the following entry: 6 ISO 4892-3, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps ISO 2016 All rights reserved 3 ISO 12619-2:2014/Amd.1:2016(E) ISO 2016 All rights reserved IC S 43.060.40 Price based on 3 pages
