... 316, 304L, 316L 5. ISO9001:2000 Stainless steel Welding Neck flange Our welding neck flanges feature high strength, good toughness, and ... and temperature. The raw materials of them come into carbon steel, stainless steel, and alloy steel, low temperature ... Pipe Caps, Bends, Gaskets, Valve parts, etc.MaterialVarious stainless steel, carbon steel, alloy steelStandardASME, ANSI, DIN, JIS, GB, BS, etc ...