1 Scope
This document specifies the requirements for flame arresters that prevent flame transmission when explosive gas-air or vapour-air mixtures are
present. It establishes uniform principles for the classification, basic construction
and information for use, including the marking of flame arresters, and specifies test methods to verify the safety requirements and determine safe
limits of use.
This document is applicable to pressures ranging from 80 kPa to 160 kPa and temperatures
ranging from –20 °C to +200 °C.
NOTE 1 For flame arresters with operational conditions inside the scope, but outside atmospheric conditions,
see Annex E.
NOTE 2 In designing and testing flame arresters for operation under conditions other than those specified above, this document can
be used as a guide. This document can also be used to design any additional testing
related to the specific conditions of use. This is particularly important when high
temperatures and pressures are applied. The test mixtures might need to be modified
in these cases.
This document does not apply to the following:
external safety-related measurement and control equipment that might be required to
keep the operational conditions within the established safe limits;
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