... pipe, Tubing pipe, OCTG, Oil pipe for oilfield: According to API SPEC 5CT.3. Steel grade: J55, K55, L80, ... O. D. Range Tubing pipe: From 2-3/8"to 4-1/2"(EUE/NU)5. Casing pipe: From 4 ... -1/2" to 20",6. Threads: BTC, LTC, STC.7. Length range ... , R2, R38. If you interested in our Casing pipe, Tubing pipe, Coupling, OCTG, Oil pipe, feel free to contact with me. API 5CT Oil ...