20-inch OD Alloy Steel Drilling Casing with BTC Threads from China
Welded alloy steel casing pipe, 20-inch external diameter with Buttress Threaded and Coupled (BTC) connections, used to case oil wells during rotary drilling. Meets HTS 7305.20.80.00 criteria as other large-diameter (>406.4 mm) alloy steel casing for oil/gas drilling applications. Provides structural integrity in deviated and horizontal 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
• Document threaded couplings separately if imported unassembled to avoid set classification issues
• Ensure 'casing' terminology in commercial invoices matches drilling specifications per API standards
• Conduct material analysis for alloy content (>1.65% manganese or other elements) to distinguish from carbon steel