本文件规定了焊接、切割和相关工艺设备可接受的最大外部气体泄漏率，并提供了测量程序。 它适用于从软管连接点（钢瓶阀门出口或供气装置连接点）向吹管供气时使用的单个部件。它不适用于天然气供应厂。 注:测量最大外部泄漏的试验方法和条件/程序的具体要求可在单独的标准中给出，例如ISO 9012中关于吸气式手吹管的标准。关于应用的方法和条件，单独标准优先于本文件。本文件规定的最大外部泄漏适用。

This document specifies the maximum external gas leakage rates which are acceptable for equipment used for welding, cutting and allied processes and provides the procedures of measurement. It applies to individual components which are used in the gas supply to a blowpipe from the connecting point of the hose (outlet of the cylinder valve or connecting point to a gas supply plant). It does not apply to gas supply plant. NOTE Specific requirements on the test method and conditions/procedure for measurement of the maximum external leakages can be given in individual standards, e.g. ISO 9012 for air-aspirated hand blowpipes. Concerning the method and the conditions to be applied, the individual standard takes precedence over this document. The maximum external leakages according to this document apply.