12-1/4 Inch V150 Sour Service Casing from China
Seamless V150 alloy steel casing optimized for H2S sour service, 12-1/4 inch (311.15 mm) OD, 17 mm wall thickness. Classifies HTS 7304.29.4160 as other alloy seamless casing in OD range with heavy wall for structural support.
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
• NACE MR0175/ISO 15156 certification mandatory for sour service alloy classification
• Wall thickness variation tolerance must be documented (<12.5% under nominal)
• Ensure invoice specifies 'casing' not 'tubing' to avoid 7304.23 misclassification