Steel Pipe, Carbon Steel Pipe, Seamless Steel Pipe manufacturer / supplier in China, offering API 5dp Oil Drill Pipe with API Thread for Drilling Well Used, Bare Line Pipe API5l Grade X42/X60/X70 ERW Welded Carbon Steel Pipe, Supply API 5CT Oilfield Casing Drill Pipes/Steel Oil Well Drilling Tubing and Casing and so on.