ISO DIS 21904-4
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
|Publication Date:||21 January 2019|
|ICS Code (Occupational safety. Industrial hygiene):||13.100|
|ICS Code (Welding equipment):||25.160.30|
This part of ISO 21904 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.
Neither method is applicable to down draught tables.