High Quality Carbon Steel Drill Pipe 1.OD: 10.3- ... ,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe ... pipe body and pipe end, magnetic particle inspection, friction welding, seam inspection. We strictly carry out API spec Q1 quality control ... and so on. Our API drill pipes are of high physical property, for their strictly controlled processing of sulphur ...