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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 ISO 21904-4:2020

Publication date:   Feb 21, 2020

General information

90.92   Standard to be revised   Oct 8, 2025

ISO

ISO/TC 44/SC 9 Health and safety

International Standard

13.100   Occupational safety. Industrial hygiene | 25.160.30   Welding equipment

Buying

Published

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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

WITHDRAWN
ISO 15012-2:2008

NOW

PUBLISHED
ISO 21904-4:2020
90.92 Standard to be revised
Oct 8, 2025

REVISED BY

IN_DEVELOPMENT
ISO/AWI 21904-4




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