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immediate downloadReleased: 2024-08-27
BS EN ISO 21904-4:2020
Health and safety in welding and allied processes. Equipment for capture and separation of welding fume Determination of the minimum air volume flow rate of capture devices
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| Standard number: | BS EN ISO 21904-4:2020 |
| Pages: | 20 |
| Released: | 2024-08-27 |
| ISBN: | 978 0 539 33133 2 |
| Status: | Standard |
DESCRIPTION
BS EN ISO 21904-4:2020
This standard BS EN ISO 21904-4:2020 Health and safety in welding and allied processes. Equipment for capture and separation of welding fume is classified in these ICS categories:
- 25.160.30 Welding equipment
- 13.100 Occupational safety. Industrial hygiene
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.