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prSRPS EN ISO 21904-4:2025

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

General information

10.99     Oct 9, 2025

ISS

M044

European Norm

English  

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

PREVIOUSLY

PUBLISHED
SRPS EN ISO 21904-4:2020

NOW

PROJECT
prSRPS EN ISO 21904-4:2025
10.99 New project approved
Oct 9, 2025

Related project

Adopted from prEN ISO 21904-4 rev IDENTICAL

Adopted from ISO/AWI 21904-4 IDENTICAL