High Quality Carbon Steel Drill Pipe 1.OD: 10.3 ... ,B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe ... contact. Regards, We are equipped with facilities of top quality in the world, such as hydraulic upset forging machine, ... ultrasonic inspection on pipe body, inspection on weld seam linearity testing and visual inspection1) Certificate: API 5DP-0002,API Q1 ...