Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges, German version EN 1092-1:2007+A1:2013, Corrigendum to DIN EN 1092-1:2013-04; German version EN 1092-1:2007+A1:2013/AC:2014— 2 стр.
German standard methods for the examination of water, waste water and sludge - General information (group A) - Part 62: Plausibility check of analytical data by performing an ion balance (A 62)— 10 стр.
Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges; German version EN 1092-1:2007— 130 стр.
Refrigerating systems and heat pumps - Safety and environmental requirements - Positive displacement refrigerant compressors; German version EN 12693:2008— 62 стр.