This document deals with the significant hazards caused by the emission of welding fume particles from welding fume separation equipment operated according to its intended use and under the conditions foreseen by the manufacturer. This document specifies safety requirements concerning the separation of welding fumes and describes a method for determining the particle separation efficiency of welding fume separation equipment. This document does not deal with: ? the hazards caused by gases emitted by welding, cutting and allied processes or by the welding fume separation equipment itself; ? the hazards caused by the noise and vibrations of the welding fume separation equipment or ? other fundamental aspects of safety technology, such as electrical, mechanical and pneumatical safety, maintenance, etc. This document applies to equipment that is manufactured after the issue of this document.