DIN 85387-2 Ships and marine technology - Loose flanges and welding necks extra light duty - Part 2: Welding necks made of CuNi10Fe1.6Mn, DN 32 to DN 50, PN up to 25, DN 65 to DN 125, PN up to 10

standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1998