NBN EN 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)

ACTIVE

About this standard

Languages
German, English and French
Type
NBN
Standards committee
CEN/TC 121
Status
ACTIVE
Publication date
29 April 2020
Replaces
NBN EN ISO 15012-2:2008
ICS Code
13.100 (Occupational safety. Industrial hygiene)
25.160.30 (Welding equipment)
Withdrawn Date

About this training

Summary

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.