... A,B,X42,X46,X52,X56,X60,X65,X70,X Carbon Steel Drill Pipe We can produced drilling pipe(API5D,APISEPC7,API5CT ... machine, middle frequency heat treatment, numerical control lathe and compete set of ultrasonic inspection and magnetic particle inspection. The whole process ... and API Spec 5DP production standard. We have a complete set of inspection process, inspection for raw material, magnetic particle ...