Seamless Steel Pipe, Boiler Tube, Alloy Steel Pipe manufacturer / supplier in China, offering S355jr S235jr S355j2h Carbon Steel SSAW Spiral Welded Tubular Pipe for Marine Jetty Pontoons Piling Construction Pile, R25 R32 R38 R51 Hollow Grouting Anchor Carbon Steel Anchor Fully Threaded Self-Drilling Anchor Bolt, API 5L Gr. B X52 X56 X65 2PE 3PE Coating Sch40 Sch80 Carbon Seamless Steel Pipe and so on.