ISO 21904-4:2020Published

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

Hygiène et sécurité en soudage et techniques connexes — Équipements de captage et de filtration des fumées — Partie 4: Détermination du débit volumique minimal d'air des dispositifs de captage

A new edition is under development: ISO/AWI 21904-4.

Abstract / scope

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.

Life cycle

Replaces

ISO 15012-2:2008WithdrawnHealth and safety in welding and allied processes — Requirements, testing and marking of equipment for air filtration — Part 2: Determination of the minimum air volume flow rate of captor hoods and nozzlesInternational Standard · Published 20 Mar 2008 · ISO/TC 44/SC 9

Replaced by

ISO/AWI 21904-4Under developmentHealth 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 devicesInternational Standard · ISO/TC 44/SC 9