ISO 15500-21:2023

Road vehicles — Compressed natural gas (CNG) fuel system components — Part 21: Discharge line closures

Scope

This document specifies tests and requirements for discharge lines closures, a compressed natural gas (CNG) fuel system component intended for use on the types of motor vehicles defined in ISO 3833.
This document is applicable to vehicles (mono-fuel, bi-fuel or dual-fuel applications) using natural gas in accordance with the ISO 15403-1. It is not applicable to the following:
a)       liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer;
b)       fuel containers;
c)        stationary gas engines;
d)       container-mounting hardware;
e)       electronic fuel management;
f)         refuelling receptacles.