BS ISO 15500-19:2020 pdf free.Road vehicles – Compressed natural gas (CNG) fuel system components.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated 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 一Compressed natural gas (CNG) fuel system components一Part 1: General requirements and definitions ISO 15500-2:2016, Road vehicles 一Compressed natural gas (CNG) fuel system components一Part 2: Performance and general test methods 3 Terms and definitions For the purposes of this document, the terms and definitions given ISO 15500-1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at https://www.iso.org/obp IEC Electropedia: available at http:// www.electropedia.org/ Test the fitting according to the procedure for testing hydrostatic strength specified in ISO 15500-2. The test pressure shall be four times the working pressure. NOTE The higher hydrostatic test pressure for the fittings compared to the other components in the other parts of the ISO 15500 series is due to consistency with fuel line provisions. Test the fitting in accordance with the procedure for testing continued operation given in ISO 15500-2 for a total of 100000 cycles. The fitting shall only be tested while connected with a rigid fuel line.  Following cycling testing, perform the leak test specified by ISO 15500-2, then the hydrostatic strength test in accordance with 6.2. Test the fitting, attached to its rigid fuel line and coupled to its mating part or parts, according to the following 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.Fittings shall be able to withstand being assembled and disassembled 25 times in a manner that is representative of their field application. BS ISO 15500-19 pdf download.