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, ... thread gauges. To improve the galling-resistance during initial break-in and drilling operation, all threads are also phosphated ...