ČSN EN ISO 21904-4 (050682)

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

STANDARD published on 1.9.2020

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The information about the standard:

Designation standards: ČSN EN ISO 21904-4
Classification mark: 050682
Catalog number: 510400
Publication date standards: 1.9.2020
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

Annotation of standard text ČSN EN ISO 21904-4 (050682):

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