... ,A,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe(API5D ... body and pipe end, magnetic particle inspection, friction welding, seam inspection. We strictly carry out API spec Q1 quality control system and ... process, inspection for raw material, magnetic particle inspection to pipe end, ultrasonic inspection on pipe body, inspection on weld seam linearity ...