Nonmalleable Cast Iron Reducing Coupling from China
A threaded reducing coupling of nonmalleable cast iron that joins pipes of different diameters in drainage systems. Classified under HTS 7307.11.00 for its cast construction from nonmalleable iron, providing corrosion resistance in underground applications.
Duty Rate — China → United States
39.8%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Provide mill test certificates specifying nonmalleable cast iron chemistry to comply with HTS material requirements
• Ensure thread standards (e.g
• NPT) match US plumbing norms to avoid import delays from non-compliance
• Watch for overclassification as malleable iron; request foundry process details if chemical analysis shows higher ductility