该欧洲标准涵盖直接蒸汽和热水发生器，包括辅助设备。为了本标准的目的，蒸汽和热水发生器是船舶和管道系统，其中: 在高于大气压力的压力下产生用于系统外部使用的蒸汽; 将水加热到高于大气压下的饱和温度的温度，以便在系统外部使用。 蒸汽发生器通常由烟道气加热的蒸发器，过热器，再热器，给水加热器，空气加热器，燃料加热器（如果有的话）和燃料燃烧设备组成。 术语“直接燃烧”涉及已知组成的燃料中的化学热转化为显热的设备。这种设备可以涉及炉子燃烧，流化床燃烧或燃烧器系统。 辅助设备包括燃料供给器，粉碎机，FD（强制通风）风扇，ID（引风机）风扇，用于除去垃圾的设施（燃烧残渣），蒸汽空气加热器，主空气加热器，燃料加热器，如果有的话，和集尘器

This European Standard covers direct-fired steam and hot water generators, including the auxiliaries. For the purposes of this standard, steam and hot water generators are vessels and pipework systems in which: ¾ steam at a pressure higher than atmospheric pressure is generated for use external to the system; ¾ water is heated to a temperature higher than the saturation temperature at atmospheric pressure for use external to the system. A steam generator normally consists of the flue gas-heated evaporator, the superheater, the reheater, the feedwater heater, the air heater, the fuel heater, if any, and the fuel burning equipment. The term 'direct-fired' relates to equipment by means of which the chemical heat in the fuel of known composition is converted to sensible heat. Such equipment can involve stoker firing, fluidized-bed combustion or burner systems. The auxiliaries include the fuel feeders, the pulverizer, the FD (forced draught) fan, the ID (induced draught) fan, the facilities for removal of the refuse (combustion residues), the steam air heater, the main air heater, the fuel heater, if any, and the dust collector.