Alloy Steel Seamless Pipe, Stainless Steel Seamless Tubes, API 5L Seamless Pipes manufacturer / supplier in China, offering GOST 8732-78/ 9567-95 CT20 ASTM A333 (Gr. 6) Seamless Pipes, ANSI B16.5 Class 150/300/600/900 Forged Carbon/Stainless Steel Flanges, Elbow Wp304 Wp316 Wp11 Pipe Fittings and so on.