18.5-Inch Surface Casing Tube from China
Welded surface casing pipe of iron/nonalloy steel, 18.5-inch OD exceeding 406.4 mm, used in gas well drilling to isolate freshwater zones and provide blowout protection. Fits HTS 7305.20.4000 as other non-seamless casing for drilling. Corrosion-resistant coating standard for longevity.
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 end-use with drilling contracts or buyer affidavits to counter 'general pipe' assumptions
• Specify wall thickness (e.g
• 0.5-1 inch) in invoices; thin walls risk reclassification as tubing
• Anti-dumping duties may apply from certain origins; check USTR lists for steel casing