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standard by International Organization for Standardization, 05/01/2012
ISO 15500-9:2012 specifies tests and requirements for the pressure regulator, a compressed natural gas (CNG) fuel system component intended for use on the types of motor vehicles defined in ISO 3833.
ISO 15500-9:2012 is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using natural gas in accordance with ISO 15403.
It is not applicable to the following:
liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer; fuel containers; stationary gas engines; container-mounting hardware; electronic fuel management; refuelling receptacles.