... casing&tubingSize (OD)Casing:4-1/2”,5”,5-1/2”,6-5/8”,7”,7-5/8”8-5/8”,9-5/8”,10-3/4”,11-3/4”,13-3/8”,16”,18-5/8 ... ”,20” Tubing:2-3/8”,2-7/8”,3-1/2”,4”,4-1/2”GradeH40,J55,K55,N80API ConnectionsRound thread(STC and ... customers’ requirementsLine pipes are used to transport oil and gas, water, mineral slurry and other fluids. Our line pipes aremanufactured in accordance ...