This European Standard is applicable to the selection of bolting PN designated flanges in accordance with the BS EN 1092 series and class designed flanges in accordance with the BS EN 1759 series. It specifies requirements for dimensions, materials and technical conditions of delivery for bolts, stud bolts and nuts.
The selection of the materials is based on commonly used materials. It covers all pressure and temperature ranges of the general service of standard flanges.
EN 1515-1:1999