... ,A,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe(API5D ... material, magnetic particle inspection to pipe end, ultrasonic inspection on pipe body, inspection on weld seam linearity testing and visual inspection1) Certificate: API ... of each heat of steel.Strict full-length inspection especially on the weld-neck region ensures the drill pipes are of no ...