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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)
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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.
These methods are not applicable to down draught tables.
Technical characteristics
| Publisher | Bureau de Normalisation Belge (NBN) |
| Publication Date | 04/29/2020 |
| Cancellation Date | 09/30/2020 |
| Page Count | 23 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
