ISO 21904-4:2020

Current Revision
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.

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