Seamless Steel Pipe, Boiler Tube, Casing Pipe manufacturer / supplier in China, offering Large diameter ASTM A106 A53 Gr. B API 5L mild Carbon Seamless Steel Pipe, API 5L Psl1 Psl2 A179 A192 A333 X42 X52 X56 X60 X65 X70 Round Seamless Carbon Steel Pipe, API5l X42 X46 X52 X60 X65 2PE 3PE Coating Spiral ERW SSAW Welded Steel Pipe and so on.
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