4.5-inch P110 Alloy Steel Casing Tubing from China
Seamless P110 grade alloy steel tubing with 4.5-inch (114.3 mm) OD and 12 mm wall thickness, used as casing in oil well drilling to line boreholes. Meets HTS 7304.23.60.45 criteria as seamless alloy steel drill pipe/casing with OD ≤168.3 mm and wall >9.5 mm.
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
• Hydrostatic test certificates required to prove pressure rating meets API 5CT P110 specifications
• Clearly mark 'OIL WELL CASING' on packaging and documentation to distinguish from line pipe
• Verify chrome/moly content in alloy analysis to confirm classification as alloy steel vs carbon steel