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>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
sklademVydáno: 2020
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

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

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Označení normy:ISO 21904-4:2020
Počet stran:10
Vydání:1
Vydáno:2020
DESCRIPTION

ISO 21904-4:2020


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.
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