10-3/4" 45.5 ppf 80ksi Sour Service Casing from China
Seamless 10-3/4 inch (273 mm) OD alloy steel casing, 45.5 ppf, 80ksi yield strength optimized for H2S sour service environments, with 11.5 mm wall and VAM TOP threaded connections. Essential for corrosive gas well drilling. Matches HTS 7304.29.31.30 criteria for thin-walled, coupled alloy drill 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
• Include NACE MR0175 compliance docs for sour service claims; measure wall thickness ultrasonically for declaration accuracy
• Avoid pitfall of declaring as carbon steel if alloy elements exceed limits