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 Ingestion-build-79769 12 In-service inspection

12 In-service inspection

NOTE This European Standard is intended to be used in conjunction with one or more of the international regulations set out in the Bibliography

The smoke density test enables the calculation of the amount of smoke given off by a material that is burning or smouldering

methods of testing and acceptance levels are not covered in this standard as they depend on the service conditions of the fabrication

It does not cover safety issues nor does it conflict with ITU-T efforts concerning the protection of telecommunications equipment [2]2

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 Ingestion-build-79769 12 In-service inspection1 Scope 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.