ISO 21904-2:2020
Health and safety in welding and allied processes — Equipment for capture and separation of welding fume — Part 2: Requirements for testing and marking of separation efficiency
This document specifies a method for testing equipment for the separation of welding fume in order to determine whether its separation efficiency meets specified requirements.
The method specified does not apply to testing of filter cartridges independent of the equipment in which they are intended to be used.
This document applies to equipment that is manufactured after its publication.
NOTE General ventilation systems are excluded from the Scope of ISO 21904-1.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test method
6.1 Selection of test arrangement
6.2 Test conditions
6.3 Procedure
6.3.1 Source emission rate measurement
6.3.2 Equipment without filter cleaning system
6.3.3 Equipment with manually initiated filter cleaning system
6.3.4 Equipment with automatically initiated filter cleaning system
6.3.5 Equipment with electrostatic precipitators
6.4 Calculation of the separation efficiency
7 Accuracy of measurement
8 Test report
Annex A (informative) Test cabin
Annex B (informative) Welding fume source
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test method
6.1 Selection of test arrangement
6.2 Test conditions
6.3 Procedure
6.3.1 Source emission rate measurement
6.3.2 Equipment without filter cleaning system
6.3.3 Equipment with manually initiated filter cleaning system
6.3.4 Equipment with automatically initiated filter cleaning system
6.3.5 Equipment with electrostatic precipitators
6.4 Calculation of the separation efficiency
7 Accuracy of measurement
8 Test report
Annex A (informative) Test cabin
Annex B (informative) Welding fume source
Bibliography