EN ISO 21904-4:2020
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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)
Published date
11-03-2020
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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.
| Committee |
CEN/TC 121
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| ISO 21904-4:2020 | Identical |
| BS EN ISO 21904-4:2020 | Identical |
| DIN EN ISO 21904-4:2020-06 | Identical |
| I.S. EN ISO 21904-4:2020 | Identical |
| ÖNORM EN ISO 21904-4:2020 06 01 | Identical |
| NEN-EN-ISO 21904-4:2020 | Identical |
| DS/EN ISO 21904-4:2020 | Identical |
| UNE-EN ISO 21904-4:2020 | Identical |
| NF EN ISO 21904-4:2020 | Identical |
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