... B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling ... 7/8",3-1/2,4",4-1/2",5",5-1/2"oil drilling pipe :-Drilling pipe,heavy ... -7/8",3-1/2,4",4-1/2",5",5-1/2",Steel Grade:E75, X95, G105, S135 ... 14001,OHSAS 180012) OD:2 3/8” TO 5 1/2” of label 1 or 60.32mm to ... are of no defects. All threads are machined by CNC Lathes and inspected with API Spec standard thread gauges ...