High Quality Carbon Steel Drill Pipe 1.OD: 10.3-1219 ... A,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe( ... to 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 ...