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 end, ultrasonic inspection on pipe body, inspection on weld seam linearity testing and visual inspection1) Certificate: API 5DP ... of steel.Strict full-length inspection especially on the weld-neck region ensures the drill pipes are of no defects. ...