This document specifies tests and requirements for the pressure relief valve (PRV), a liquefied natural gas fuel system component intended for use on the types of motor vehicles defined in ISO 3833. This document is not applicable to the following:
a) fuel containers;
b) stationary gas engines;
c) container mounting hardware;
d) electronic fuel management;
e) refuelling receptacles.nd edition 2021-06 Road vehicles — Liquefied natural gas (LNG) fuel system components — Part 7: Pressure relief valve (PRV) Véhicules routiers — équipements pour véhicules utilisant le gaz naturel liquéfié (GNL) comme combustible — Partie 7: Soupape de sécurité à la pression Reference number ISO 12614-7:2021(E) ？ ISO 2021 ISO 12614-7:2021(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO