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
75%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 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
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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