BS EN 14986:2017 - Design of fans working in potentially explosive atmospheres

BS EN 14986:2017

Design of fans working in potentially explosive atmospheres

Status : Current   Published : January 2017
Conformity to regulation : Designated



1.1 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.


Operation conditions for the different categories of fans used in this European Standard are defined in Clause 4.


Technical requirements for category 1 D fans are not given in this document. Where explosive dust atmospheres are regularly conveyed, explosion protection measures as described in EN 1127‑1 are required if this specific us is needed.

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.


Requirements for group I fans are given in EN 1710.


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 atmosphere (flammable or not)), outside, or inside and outside of the fan.

1.4 This European Standard is applicable to fans working in ambient atmospheres and with normal atmospheric conditions at the inlet, having

  • absolute pressures ranging from 0,8 bar to 1,1 bar,

  • and temperatures ranging from −20 °C to +60 °C,

  • and maximum volume fraction of 21 % oxygen content,

  • and an aerodynamic energy increase of less than 25 kJ/kg.


25 kJ/kg is equivalent to 30 kPa at inlet density of 1,2 kg/m 3.

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.

This European Standard should not apply to integral fans as a part of Diesel engines, vehicles or electric motors.


Where undated references are used in the body of the standard the latest edition applies.

Standard NumberBS EN 14986:2017
TitleDesign of fans working in potentially explosive atmospheres
Publication Date31 January 2017
Conformity to regulationDesignated
Normative References(Required to achieve compliance to this standard)ISO 5801:2017, EN 1127-1:2011, ISO 80079-37:2016, ISO 11925-2:2020, ISO 80079-36:2016, BS EN ISO 11925-2:2020, EN ISO 80079-36:2016, EN 60079-0, ISO 13349:2010, ISO 12100, EN ISO 11925-2, EN ISO 16852:2010, EN ISO 80079-37:2016, ISO 14694:2003, EN ISO 13349:2010, EN ISO 5801, EN ISO 12100, ISO 16852:2008, ISO 14694:2003/AMD1
Informative References(Provided for Information)EUROVENT 1/9, EN 1710, EN 60079-18, ISO 1940-1, 2014/34/EU, EN 13237, TRAC 201:1990, ISO 13351, EN ISO 13351, EN 60034-1, EUROVENT 1/8, EN ISO 13857, EN 60079-6, ISO 5802, ISO 14695, EN 60079-2, EN 60079-11, prEN 14461, EN 13463-2, IEC/TS 60079-32-1, EN 13463-3, EN ISO 5802, CLC/TR 60079-32-1, EN 1755, EN ISO 2409, EUROVENT 1/5, ISO 9563, EN 60079-15, ISO 13857, EN 1652, IEC 60167, EN 60079-7, EN 60079-14, EN 60079-1, EN 60079-5, EN 14460:2018, ISO 281, ISO 1813, ISO 2409, ISO 1925, EN 60335-2-80:2015
ReplacesBS EN 14986:2007
International RelationshipsEN 14986:2017
Draft Superseded By14/30294092 DC
DescriptorsVerification, Protected electrical equipment, Explosive atmospheres, Explosions, Safety measures, Fans, Equipment safety, Fire risks, Test methods, Risk assessment
Title in FrenchConception des ventilateurs pour les atmosphères explosibles
Title in GermanKonstruktion von Ventilatoren für den Einsatz in explosionsgefährdeten Atmosphären
ISBN978 0 580 85162 9
File Size2.08 MB

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