The purpose of this standard is to describe the methods for classifying the following solid mineral fuels into granulometric fractions: hard lignite, coal and anthracite. The methods described in this standard are applicable to hard lignite, coal and anthracite, both raw fuel and calibrated or screened. They are not applicable to artificially manufactured fuels, including coke, nor to very finely pulverized fuels (maximum particle size equal to or less than 45 pm), whose granulometric classification methods are excluded. of the field of application of this standard.