... ,A,B,X42,X46,X52,X56,X60,X65,X70,X Carbon Steel Drill Pipe We can produced drilling pipe(API5D,APISEPC7,API5CT) of ... ",5",5-1/2"oil drilling pipe :-Drilling pipe,heavy weight drilling pipe,tubing pipe,casing pipe. We can produced drilling pipe(eu,iu ieu) of 2 ... . All threads are machined by CNC Lathes and inspected with API Spec standard thread gauges. To improve the galling-resistance during ...