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ILNAS-EN ISO 21904-4:2020 Edition 03/2020
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)
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Abstract

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.

Status

Standard - Active

Origin

Technical Committee :
CEN/TC 121 : Welding and allied processes

Implementation

start of the vote on the project    24/01/2019   date of ratification (dor)    20/01/2020
end of the vote on the project    15/04/2019   date of anouncement (doa)    30/06/2020
start of the vote on the final project    24/10/2019   date of publication (dop)    30/09/2020
end of the vote on the final project    19/12/2019   date of withdrawal (dow)    30/09/2020


Publication Official Journal
of the Grand-Duchy of Luxembourg
21/10/2020
Reference Mémorial A N° 855

Relations

Relations to older standards
ILNAS-EN ISO 15012-2:2008
ILNAS-EN ISO 15012-4:2016

Relations to international standards
ISO 21904-4 
ISO 21904-4:2020 

International Classification for Standards (ICS codes) :

13.100 : Occupational safety. Industrial hygiene
25.160.30 : Welding equipment

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