... 1/2"oil drilling pipe :-Drilling pipe,heavy weight drilling pipe,tubing pipe,casing pipe. We can produced drilling pipe(eu,iu ieu) ... , hot straightening, could straightening, ultrasonic inspection on pipe body and pipe end, magnetic particle inspection, friction welding, seam ... raw material, magnetic particle inspection to pipe end, ultrasonic inspection on pipe body, inspection on weld seam linearity ...