标准摘要
[中文适用范围]： 本文件定义了测量焊枪抽气系统焊接烟雾捕获效率的实验室方法。 该程序仅规定了一种方法，将测试参数的选择留给用户，以便可以评估不同变量的效果。 它适用于集成焊枪系统以及将离散抽取系统连接到靠近电弧区域的焊枪的系统。 该方法适用于所有连续焊丝焊接工艺、所有材料类型和所有焊接参数。 该方法可用于评估抽气流量、抽气喷嘴位置、保护气体流量、焊接几何形状、焊枪角度、烟雾排放率等变量对捕获效率的影响。 [外文原描述]： ISO 21904-3:2018 defines a laboratory method for measuring the welding fume capture efficiency of on-torch extraction systems. The procedure only prescribes a methodology, leaving selection of the test parameters to the user, so that the effect of different variables can be evaluated. ISO 21904-3:2018 is applicable to integrated on-torch systems and to systems where a discrete extraction system is attached to the welding torch close to the arc area. The methodology is suitable for use with all continuous wire welding processes, all material types and all welding parameters. The method can be used to evaluate the effects of variables such as extraction flow rate, extract nozzle position, shielding gas flow rate, welding geometry, welding torch angle, fume emission rate, etc., on capture efficiency.
英文名称Health and safety in welding and allied processes — Requirements, testing and marking of equipment for air filtration — Part 3: Determination of the capture efficiency of on-torch welding fume extraction devices