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This European Standard deals with the significant hazards, hazardous situations and events relevant to the following machinery for grinding and processing of flour and semolina, as defined in Clause 3: roller mills, plan sifters and rotary separators, air classifiers, rotating machines and impact machines. The machines in the scope are stationery (not intended to be moved when in operation), have a capacity of at least 100 kg/h, and are intended for use in installations for grain processing, such as flour mills, semolina mills, grain cleaning and flaking plants. This European Standard deals with the significant hazards during commissioning, operation, cleaning and maintenance of the machines in the scope when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer. This European Standard is not applicable to: machines intended for household use or laboratory use; stone mills; equipment for dampening and heating; auxiliary equipment for conveying, weighting and bagging (without changing the characteristics of the products). This European Standard is not dealing with the following: hazards related to decommissioning; the hazards of the installations into which the machines are incorporated other than those directly related to the machines in the scope (e. g. start of the installation, disconnection of energy supply, need from an emergency stop device); hazards due to the use of the machinery in a potentially explosive atmosphere (when producing this standard it has been assumed that the machinery in the scope, if designed and used in accordance with this European Standard, is not creating itself a hazardous atmosphere wholly of partly surrounding it). NOTE If the machine is intended for use in a potentially explosive atmosphere, additional safety measures can be necessary). This European Standard is not applicable to machines for grinding and processing of flour and semolina which are manufactured before the date of its publication as EN.