... X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe( ... pipes are made according to API SPEC 5D OD (in). OD (mm) W(lb/ft) W(kg/m ... . Regards, We are equipped with facilities of top quality in the world, such as hydraulic upset forging machine, ... . To improve the galling-resistance during initial break-in and drilling operation, all threads are also phosphated ...