ISO 12614-8:2014 specifies tests and requirements for the excess flow valve, a liquefied natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. ISO 12614-8:2014 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) fuel containers,
b) stationary gas engines,
c) container mounting hardware,
d) electronic fuel management,
e) refueling receptacles.