... Casing and Tubing 1. On sale seamless API-5CT Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe.2. Our factory manufacture Casing ... pipe, OCTG, Oil pipe for oilfield: According to API SPEC 5CT.3. Steel grade: J55, K55, L80, N80, C95, P1104. O. D ... interested in our Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe, feel free to contact with me. API 5CT J55 Casing and Tubing