Reference number
ISO 21904-4:2020
© ISO 2025
International Standard
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
Edition 1
2020-02
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Published (Edition 1, 2020)

ISO 21904-4:2020

Language
Format
CHF 65
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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.

General information

  • Status
     : Published
    Publication date
     : 2020-02
    Stage
    : International Standard under systematic review [90.20]
  • Edition
     : 1
    Number of pages
     : 10
  • Technical Committee :
    ISO/TC 44/SC 9
    ICS :
    13.100  25.160.30 
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