BS ISO 15500-21:2023

Road vehicles. Compressed natural gas (CNG) fuel system components. Discharge line closures | Status: Current, Under review

1 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:

1. a) liquefied natural gas (LNG) fuel system components located upstream of, and including, the vaporizer;
2. b) fuel containers;
3. c) stationary gas engines;
4. d) container-mounting hardware;
5. e) electronic fuel management;
6. f) refuelling receptacles.