Welding Neck Flange, Carbon Steel Flange, Pipe Flange manufacturer / supplier in China, offering ASME B16.36 Class 150 Carbon Steel (A105) Blind Flanges - Wholesale Stock & Quick Delivery, ANSI B16.5 Pipe Flanges Nps1/2-Nps24 Exporter with ISO 9001 Certification En10204-3.1 Stainless Steel 304 316 316L 321 347 904L Xxnx AISI 150 RF, ASME SA350 Lf3 Irregular Forgings, Offshore, Made in China ASTM A370 and so on.