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coupling for casing pipe and tubing use

API Coupling and threads for Casing & Tubing (OCTG API Coupling and threads used in connecting casing pipe and tubing. Manufactured in seamless, material grade same with the pipe body (API 5CT K55/J55, N80, L80, P110 etc). Ranged in BTC, NU, EUE and premium, with different dimensions and performances.

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