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sklademVydáno: 2020-03-18
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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| Označení normy: | BS EN ISO 21904-4:2020 |
| Počet stran: | 20 |
| Vydáno: | 2020-03-18 |
| ISBN: | 978 0 580 99525 5 |
| Status: | Standard |
Popis
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:
- 13.100 Occupational safety. Industrial hygiene
- 25.160.30 Welding equipment
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.