... such an ANSI/ASME, BS4504, DIN, UNI, GOST Hebei Xingu Flange Co., Ltd. Founed in 2007. We professionally export, design, produce ... welding flanges, Threaded flange, Lap joint flange and flange pipe fittings.The main materials of flanges are carbon steel, ... -W0 Certification. Meanwhile, we also passed the Pressure Pipe Components Manufacturing Safety Registered Certification of the State Quality ...