... 304, 316, 304L, 316L 5. ISO9001:2000 Stainless steel Welding Neck flange Our welding neck flanges feature high strength, good toughness, and ... , Tees, Concentric and Eccentric Reducers, Pipe Caps, Bends, Gaskets, Valve parts, etc.MaterialVarious stainless steel, carbon steel, alloy steelStandardASME, ANSI, DIN, JIS ... and special design are warmly welcome SS316 Stainless Steel Welding Neck Flange