3-1/2 inch T95 Casing with STC Threads from China
High-strength T95 seamless alloy steel casing, 3-1/2 inch OD, Surface Thread Casing (STC) connections, wall thickness <12.7 mm for tie-back and shallow conductor applications. Provides collapse resistance in unconsolidated formations. HTS 7304.29.31.10 classification for threaded/coupled oil/gas casing.
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
• Confirm minimum yield strength documentation for T95 grade (655 ksi)
• Provide connection make-up torque specifications for STC threads
• Label clearly as 'oil well casing' to distinguish from line pipe