Other
Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof: > Auxiliary plant for use with boilers of heading 8402 or 8403 > Other
Duty Rate (from China)
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
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)
Products classified under HTS 8404.10.00.50
Boiler Draft Fan Silencer
Acoustic silencer for induced draft fans in boiler systems, under HTS 8404.10.0050 as auxiliary plant. Reduces noise while maintaining required draft pressure differentials.
Deaerator Spray Valve Assembly
Specialized valve tray assembly for steam deaerators removing dissolved oxygen from boiler feedwater, HTS 8404.10.0050 auxiliary. Critical for corrosion prevention in steam cycles.
Steam Desuperheater Injector
Water spray injector reducing superheated steam temperature in boiler outlet headers, under HTS 8404.10.0050. Attenuation control for process steam requirements.
Condenser Tube Cleaning System
Automated bullet or sponge ball circulation system maintaining condenser tube cleanliness, HTS 8404.10.0050 auxiliary for steam power condensers. Prevents efficiency loss from fouling.
Gas-to-Gas Boiler Economizer
Air preheater recovering flue gas heat to preheat combustion air for boilers, HTS 8404.10.0050 auxiliary plant. Typically rotary regenerative or tubular recuperative design for gas-fired units.
Industrial Superheater Coil Assembly
Tubular coil assembly that superheats steam beyond saturation temperature in boiler systems, falling under HTS 8404.10.0050 as other auxiliary plant for use with boilers. It improves steam quality for turbine efficiency in power generation.
Flue Gas Heat Recovery Unit
Compact unit capturing waste heat from boiler exhaust gases for process heating or power generation, under HTS 8404.10.0050 as other auxiliary boiler plant. Improves overall plant thermal efficiency.
Boiler Economizer Bypass Damper
Heavy-duty damper system controlling flue gas flow around economizers for temperature regulation, under HTS 8404.10.0050 as auxiliary boiler plant. Critical for safe operation during startup and load changes.
Retractable Soot Blower Lance
Telescoping lance assembly that extends into boiler convection passes for on-line cleaning, under HTS 8404.10.0050. Uses steam or air to dislodge ash without stopping boiler operation.
Boiler Feedwater Preheater
Shell-and-tube preheater using extracted steam to raise feedwater temperature before boiler entry, HTS 8404.10.0050 auxiliary plant. Reduces thermal shock and improves cycle efficiency.
Economizer Heat Exchanger Module
A heat recovery device installed in boiler flues to preheat feedwater using waste flue gases, classified under HTS 8404.10.0050 as auxiliary plant for boilers of heading 8402 or 8403. It enhances boiler efficiency by recovering heat that would otherwise be lost.
Soot Blower System for Boilers
Automated mechanical or steam lance system that removes soot deposits from boiler tubes to maintain heat transfer efficiency, classified in HTS 8404.10.0050 as auxiliary plant. Essential for reducing downtime in coal-fired power plants.
Condenser Air Removal Package
Vacuum pump and ejector system for removing non-condensable gases from steam condensers in power plants, classified under HTS 8404.10.0050 as auxiliary for vapor power units. Maintains condenser vacuum for optimal turbine performance.
Steam Surface Condenser Tube Bundle
Removable bundle of finned tubes for heat exchange in surface condensers of steam power units, HTS 8404.10.0050 as auxiliary/parts. Facilitates efficient steam condensation while protecting turbine vacuum.
Condenser Hotwell Pump Skid
Pre-assembled skid with pumps transferring condensate from condenser hotwell to feedwater system, under HTS 8404.10.0050. Includes level controls specific to power plant condensers.