TP321H Cold-Rolled Boiler Economizer Tube from China
Seamless cold-rolled TP321H stabilized stainless tube for economizer sections in recovery boilers. Stabilized against weld decay in wet corrosive flue gas. 7304.51.50.15 applies to its heat-resisting seamless cold-formed construction for boilers.
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
• Economizer use may require low-finned variants—confirm smooth wall for this code
• Biomass boiler specs often need erosion test data in entry docs
• Avoid 7304.41 by proving >800°C service rating