Belt Neck Flat Welding Flange pipe union Belt Neck Flat Welding FlangeSize: DN10-DN800Standards: DIN2632-2638, DIN2576, ANSI B16.5, SH3406, GB9112-9131Material Specifications: 317L, 310S, 304H, Duplex2205, 321 / 321H, 304L, 316LUsage: pipe union Belt Neck Flat Welding Flange