Superheater Coil Assembly from China
Coiled high-temperature alloy tubes that superheat saturated steam from boilers to increase energy content and efficiency in power generation. Classified as parts under HTS 8404.90.00.00 for auxiliary plant used with boilers of 8402 or 8403. Essential for turbine performance in steam power units.
Duty Rate — China → United States
38.5%
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
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Import Tips
• Include pressure ratings and temperature specs in documentation to confirm classification as superheater parts
• Ensure origin certificates for alloys to qualify for preferential tariffs under USMCA or similar agreements
• Avoid common pitfall of declaring as generic 'pipes'; specify 'superheater elements for steam boilers'