1. Products: Tubing and Casing 2. Standards: API 5CT, API SPEC 5B, ISO 11960 3. ... : J55, K55, N80, P110, L80 etc 1. Products: Tubing and Casing 2. Standards: API 5CT, API SPEC 5B, ISO 119603. Steel ... used to extracting petroleum and natural gas from a well; casing serves as walls of a well. 13. Terms of Payment ...