8404.10.00/Boiler Economizer/China

Boiler Economizer from China

A heat recovery device installed in the flue gas path of steam boilers (headings 8402 or 8403) to preheat feedwater using residual heat from exhaust gases, improving overall boiler efficiency. It qualifies under HTS 8404.10.00 as auxiliary plant specifically designed for use with those boilers. Typically constructed from finned tubes and steel casings to withstand high temperatures.

Duty Rate — China → United States

41%

Rate breakdown

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)

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China

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Import Tips

• Verify compatibility certification with specific boiler models in headings 8402 or 8403 to confirm auxiliary plant status

• Include detailed engineering drawings and heat transfer specs in documentation to avoid reclassification as general heat exchangers

• Ensure pressure vessel compliance with ASME or equivalent standards; common pitfall is missing hydrostatic test certificates