carbon steel forged flange and pipe fitting We manufature all standard product conforming to ... We are the Hebei Xinfeng High-pressure Flange and Pipe Fitting Co.Ltd. As one of the biggest flange ... forged flanges. The product line covers:1. Material: carbon steel, stainless steel, alloy steel;2. Standard: GOST, ANSI, DIN, JIS, EN, ... slip-on, weld-on, lap joint, threaded, socket welding. Pipe fitting :