标准摘要
[中文适用范围]： 本文件规定了两种确定最小风量的方法。 一种方法专门用于捕集罩、喷嘴和狭缝喷嘴，狭缝长度与软管直径的比率为 8:1 或更小。 另一种方法专用于枪上提取装置。 这些方法不适用于下草稿台。 [外文原描述]： This document specifies two methods for establishing the minimum air volume flow rate. One method is dedicated for use with captor hoods, nozzles and slot nozzles with a ratio of slot length to hose diameter of 8:1 or less. The other method is dedicated for use with on-gun extraction devices. These methods are not applicable to down draught tables.
英文名称Health and safety in welding and allied processes — Equipment for capture and separation of welding fume — Part 4: Determination of the minimum air volume flow rate of capture devices