... .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 ... , R2, R38. If you interested in our Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe, feel free to contact with me. API 5CT Casing and Tubing P110