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This European Standard specifies the environmental conditions, the sample handling and analytical procedures and the method of calculating and presenting the results. Reasons are given for the need for more than one method and advice is given on the choice of method to be used. This European Standard establishes a classification scheme for dustiness to provide a standardised way to express and communicate the results to users of the bulk materials. Details of the scheme for each method are given in EN 15051 2 and EN 15051 3. This European Standard is applicable to powdered, granular or pelletized bulk materials. This European Standard is not applicable to test the dust released during mechanical reduction of solid bulk materials (e.g. cut, crushed) or to test application procedures for the bulk materials. Figure 1 gives a flow chart to provide the user of this European Standard a route through the necessary stages that need to be taken to obtain values of the dustiness of a given bulk material.