ISO 5175-1:2017规定了燃料气、氧气或压缩空气安全装置的一般要求和试验，包括歧管、气缸和/或管道出口调节器下游以及焊接、切割和相关工艺用吹管上游使用的火焰（回火）抑制器。 ISO 5175-1:2017未规定这些装置在气体系统中的位置。 ISO 5175-1:2017不适用于ISO 5175-2中未包含阻火器的安全装置。 ISO 5175-1:2017不适用于在预混合氧气/燃料或空气/燃料气体供应系统的应用中使用包含阻火器的安全装置，例如在气体混合器或发电机的下游，通过电解分解水来产生氢气/氧气混合物。

ISO 5175-1:2017 specifies the general requirements and tests for safety devices for fuel gases and oxygen or compressed air incorporating a flame (flashback) arrestor used downstream of manifold, cylinder and/or pipeline outlet regulators, and upstream of blowpipes for welding, cutting and allied processes. ISO 5175-1:2017 does not specify the location of these devices in the gas system. ISO 5175-1:2017 is not applicable to safety devices not incorporating a flame arrestor, covered by ISO 5175？2. ISO 5175-1:2017 does not apply to the use of safety devices incorporating flame arrestors for applications with premixed oxy/fuel or air/fuel gas supply systems, e.g. downstream of gas mixers or a generator to produce hydrogen/oxygen mixture by electrolytic decomposition of water.