Carbon Steel Pipe, Stainless Steel Pipe, Copper Nickel Tube manufacturer / supplier in China, offering Oil and Boiler Use Seamless Steel Pipe API 5L ASTM A106 A53 A192 Grade B Carbon Alloy Stainless Tube, Heat Exchanger and Condenser Use Brass Tubing C44300 C68700 C61400 CZ110 CZ111 Cuzn28sn1 Cuzn22al, Plumbing System Use 90 Degree Lr Elbow Sch Std ASTM A234 Wpb ASME B16.9 750nb 800nb 900nb Pipe Fitting and so on.