5-1/2 inch K-55 Heavy Wall Casing from China
Threaded and coupled K-55 seamless casing, 139.7 mm OD, 14.0 mm wall thickness, nonalloy steel for corrosive oilfield environments. Fits HTS 7304.29.10.20 precisely as seamless drilling casing of iron/nonalloy steel, OD <215.9 mm, wall ≥12.7 mm. Provides collapse resistance in conductor casing strings.
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
• Ensure couplings are API-interchangeable; include thread inspection reports
• Differentiate from tubing via wall thickness docs
• Common issue: undervaluation due to scrap steel mislabeling