18-5/8 inch 87.5 lb/ft C-110 Casing from China
Seamless C-110 alloy steel casing with 18-5/8 inch (473.1 mm) OD exceeding 406.4 mm, 87.5 lb/ft weight class, for high-yield oil well applications. HTS 7304.29.4180 covers this as other alloy seamless drill casing of large diameter. Used primarily in intermediate casing sections.
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 invoice specifies 'seamless' and excludes any welded sections to maintain classification
• Batch test for hardness and chemistry; customs audits are common for alloy verification