1. Products: Tubing and Casing 2. Standards: API 5CT, API SPEC 5B, ISO ... K55, N80, P110, L80 etc 1. Products: Tubing and Casing 2. Standards: API 5CT, API SPEC 5B, ISO 119603. ... N80, P110, L80 etc4. Tolerance: by the standard5. Size: Outer Diameter(OD): 48mm-325mm; Wall Thickness(WT): 3mm-20mm; Length ... to extracting petroleum and natural gas from a well; casing serves as walls of a well. 13. Terms of ...