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 specific adjustment factors for calculation

specific adjustment factors for calculation of characteristic values are given in EN 384

It applies

BS EN 419241-1 provides commonly recognized functional models of TW4S

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

12 In-service inspection

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 specific adjustment factors for calculation1 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.