本欧洲标准只涉及使用水基清洗液的表面清洁和预处理（以下称为“清洁机”）的工业物品的显着危害，以化合物或物质的悬浮，溶液或分散的方式通过浸入和/或喷雾在一个或多个阶段施加的水。 本欧洲标准适用于EN 12921-1。这两个部分一起使用液体或蒸气的工业物品的清洁机器，在制造商预见的条件下使用时（见第4节），这些部分一起涵盖了所有重大的危险。本标准规定的具体要求优先于EN 12921-1的各自要求。本标准应与EN 12921-3一起应用，以防止从基于水的清洁液体释放易燃蒸气。 本欧洲标准与EN 12921-3和prEN 12921-4一起适用于使用水性清洁液体时，蒸发会导致爆炸性环境引起的危险。含有超过体积的2％量的卤化溶剂的水基清洗液体对于产生潜在的爆炸性气体而言是有害的。 这个欧元

This European Standard deals only with the significant hazards of machines for surface cleaning and pre-treatment (in the following called "cleaning machines") of industrial items using water based cleaning liquids in the mode of suspension, solution or dispersion of compounds or substances in water applied by immersion and/or spraying in one or more stages. This European Standard applies in combination with EN 12921-1. Both parts together cover all significant hazards relevant for cleaning machines for industrial items using liquids or vapours, when they are used as intended and under the conditions foreseen by the manufacturer (see clause 4). The specific requirements specified in this standard take precedence over the respective requirements in EN 12921-1. This standard should be applied together with EN 12921-3 in case of release of flammable vapours from water based cleaning liquids. This European Standard applies together with EN 12921-3 and prEN 12921-4 in case of use of water based cleaning liquids of which evaporating can lead to hazards caused by explosive atmospheres. Water based cleaning liquids containing a quantity of halogenated solvents exceeding 2 % of the volume are considered hazardous with respect to the creation of a potentially explosive atmosphere. This European Standard does not apply to machinery and related equipment excluded from the scope of EN 12921-1. This European Standard does not apply to cleaning machines for industrial items using water based cleaning liquids which are manufactured before the publication of this standard by CEN.