... B,X42,X46,X52,X56,X60,X65,X70,X High Quality Carbon Steel Drill Pipe We can produced drilling pipe ... (API5D,APISEPC7,API5CT) of 2-3/8",2-7/8",3-1/2,4",4-1/2",5 ... pipe(eu,iu ieu) of 2-3/8",2-7/8",3-1/2,4",4-1/2",5 ... ISO 9001,ISO 14001,OHSAS 180012) OD:2 3/8” TO 5 1/2” of label 1 or 60 ... CNC Lathes and inspected with API Spec standard thread gauges. To improve the galling-resistance during initial break- ...