9-5/8 inch OD API 5CT K55 Oil Well Casing from China
Threaded and coupled seamless K55 grade casing with 9.625 inch (244.5 mm) OD and 11.2 mm wall thickness for oil drilling applications. Fits 7304.29.10.30 as seamless nonalloy steel drill pipe/casing, OD 215.9-285.8 mm range, wall under 12.7 mm. Used to isolate production zones in wells.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Submit detailed dimensional certificates; inspectors often check OD (must be 215.9+ mm) and wall caliper measurements
• Avoid classifying as drill pipe if not beveled for rotation—pure casing stays here
• Include collapse/ burst test data per API 5CT to demonstrate oil/gas drilling use