API 5CT J55 Casing and Tubing 1.OD 60.32 - 508mm 2.WT: 3.68~ ... Coupling, OCTG, Oil pipe.2. Our factory manufacture Casing pipe, Tubing pipe, OCTG, Oil pipe for oilfield: According to API SPEC ... 5CT.3. Steel grade: J55, K55, L80, N80, C95, P1104. O. D. Range Tubing pipe: From 2-3/8"to ... R1, R2, R38. If you interested in our Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe, feel free to contact with ...