... ,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe( ... treatment, hot straightening, could straightening, ultrasonic inspection on pipe body and pipe end, magnetic particle inspection, friction welding, seam ... magnetic particle inspection to pipe end, ultrasonic inspection on pipe body, inspection on weld seam linearity testing and visual inspection1) ...