API 5CT Casing and Tubing 1.OD 60.32 - 508mm 2.WT: 3.68~16.13mm 3.ISO Standard, ... API certificate 4.Gread: J55K55N80L80C90P110 API 5CT Casing and Tubing 1. ... , Coupling, OCTG, Oil pipe.2. Our factory manufacture Casing pipe, Tubing pipe, OCTG, Oil pipe for oilfield: ... range: R1, R2, R38. If you interested in our Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe, feel ...