ISO 21904-1:2020 PDF

Scope: This document defines the general requirements for ventilation equipment used to capture and separate fumes generated by welding and allied processes, e.g. arc welding and thermal cutting. This document also specifies the test data to be marked on the capture devices. It applies to the design and manufacture of parts of the equipment including hoods for welding, ducting, filter units, air movers, systems that inform of unsafe operation and workplace practices to ensure safe working with regard to exposure. Significant hazards are listed in Clause 4. It does not cover electrical, mechanical and pneumatic hazards. This document is applicable to: — local exhaust ventilation systems (LEV) excluding draught tables; — mobile and stationary equipment; — separation equipment used for welding and allied processes; This document is not applicable to: — general ventilation, air make up or air movement systems; — air conditioning systems; — grinding dust. This document applies to systems designed and manufactured after its publication. NOTE Specific safety requirements for thermal cutting machines are defined in ISO 17916.

ISO 21904-1:2020 Referenced Document

IEC 60204-1:2005 Safety of machinery - Electrical equipment of machines - Part 1: General requirements
IEC 60335-2-69:2012 Household and similar electrical appliances - Safety - Part 2-69: Particular requirements for wet and dry vacuum cleaners, including power brush, for commercial use
ISO 12100:2010 Safety of machinery - General principles for design - Risk assessment and risk reduction
ISO 13849-1:2015 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design
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
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

2020 ISO 21904-1:2020 Health and safety in welding and allied processes — Equipment for capture and separation of welding fume — Part 1: General requirements