1.1本欧洲标准规定了II类（IIA类，IIB型和氢气）类别1,2类和3类和II类D类别2和3类别构建的风扇的结构要求，用于爆炸性环境。 注1:本欧洲标准中使用的不同类型风扇的操作条件见第4章。 注2:本文档未提供D类风扇的技术要求。如果经常输送爆炸性粉尘环境，如果需要特殊的使用需要，则需要EN 1127-1所述的防爆措施。 1.2本欧洲标准不适用于内燃机旋转电机，冷却风扇或叶轮的第一组风机（采矿风机），冷却风扇或叶轮。 注1:EN 1710给出了I组风扇的要求。 注2:电气部件的要求包括在电气设备标准中。 1.3本欧洲标准规定了用于气体，蒸气，雾气和/或粉尘的空气中的潜在爆炸性环境中的完整风扇单元的设计，构造，测试和标记要求。这种气氛可能存在于内部（传送的气氛（易燃或不易燃）），外部或内部和外部

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. NOTE 1 Operation conditions for the different categories of fans used in this European Standard are defined in Clause 4. NOTE 2 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. 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 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. NOTE 1 25 kJ/kg is equivalent to 30 kPa at inlet density of 1,2 kg/m3. 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. NOTE 2 Where undated references are used in the body of the standard the latest edition applies.