Steel Pipe, Stainless Steel, Galvanized Coil manufacturer / supplier in China, offering ASTM A192 A199 A209 A210 A213 20# 45# 159*8 Seamless Steel Pipe, Customized 20# 159*6.5 Seamless Steel Pipe for Oil, Large Diameter 10# 20# 45# 159*6 Round Seamless Steel Pipe and so on.