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ISO 21904-4:2020

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
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ISO 21904-4:2020

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

PUBLISH DATE 2020
ISO 21904-4:2020

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.

SDO ISO: International Organization for Standardization
Document Number ISO 21904
Publication Date Feb. 1, 2020
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 44/SC 9
Publish Date Document Id Type View
Feb. 1, 2020 ISO 21904-4:2020 Revision