Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method; German version EN 1591-1:2001+A1:2009+AC:2011— 60 стр.
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 3: Copper alloy flanges; German version EN 1092-3:2003 + AC:2004— 38 стр.