This European Standard specifies the constructional requirements for fans constructed to Group II G (of explosion groups IIA, IIB and hydrogen) categories 1, 2 and 3, and Group II D categories 2 and 3, intended for use in explosive atmospheres.
NOTE Operation conditions for the different categories of fans used in this European Standard are defined in Clause 4.
1.2 This European Standard does not apply to group I fans (fans for mining), cooling fans or impellers on rotating electrical machines, cooling fans or impellers on internal combustion engines.
NOTE 1 Requirements for group I fans are given in EN 1710.
NOTE 2 The requirements for electrical parts are covered by references to electrical equipment standards.
1.3 This European Standard specifies requirements for design, construction, testing and marking of complete fan units intended for use in potentially explosive atmospheres in air containing gas, vapour, mist and/or dusts. Such atmospheres may exist inside (the conveyed fluid), outside, or inside and outside of the fan.
1.4 This European Standard is applicable to fans working in the range of ambient atmospheres having absolute pressures ranging from 0,8 bar to 1,1 bar, temperatures ranging from − 20 °C to + 60 °C, maximum volume fraction of 21 % oxygen content and an aerodynamic energy increase of less than 25 kJ/kg.
NOTE 1 This European Standard may also be helpful for the design, construction, testing and marking of fans intended for use in atmospheres outside the validity range stated above or in cases where other material pairings need to be used. In this case, the ignition risk assessment, ignition protection provided, additional testing (if necessary), manufacturer's marking, technical documentation and instructions to the user, should clearly demonstrate and indicate the equipment's suitability for the conditions the fan may encounter.
NOTE 2 This European Standard does not apply to integral fans of electric motors.
NOTE 3 Where undated references are used in the body of the standard the latest edition applies.
BS EN 14986:2007 Referenced Document
EN 1050 Safety of Machinery - Principles for Risk Assessment
EN 1127-1:1997 Explosive Atmospheres - Explosion Prevention and Protection - Part 1: Basic Concepts and Methodology
EN 12874:2001 Flame Arresters - Performance Requirements, Test Methods and Limits for Use
EN 13463-1:2001 Non-Electrical Equipment for Potentially Explosive Atmospheres - Part 1: Basic Method and Requirements*, 2024-04-18 Update
EN 294 Safety of machinery; safety distances to prevent danger zones being reached by the upper limbs
BS EN 14986:2007 history
2017BS EN 14986:2017 Design of fans working in potentially explosive atmospheres
2007BS EN 14986:2007 Design of fans working in potentially explosive atmospheres