1 Scope
This document specifies tests and requirements for the pressure relief device (PRD),
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 ISO 15403‑1.
It is not applicable to the following:
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a) liquefied natural gas (LNG) fuel system components located upstream of, and including,
the vaporizer;
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b) fuel containers;
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c) stationary gas engines;
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d) container-mounting hardware;
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e) electronic fuel management;
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f) refuelling receptacles.