Seamless Steel Pipe, Boiler Tube, Casing Pipe manufacturer / supplier in China, offering ASTM A106 A53 Gr. B API5l Sch40 Sch80 Sch120 Carbon Seamless Steel Pipe for Oil and Gas, Hot Rolled S235 S345 S275 X52 X65 St37 St52 Sch40 Sch80 Black Seamless Steel Pipe, High temperature A335 P1 P5 P9 P11 P22 P91 alloy Seamless Steel Pipe&Tube and so on.
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