Parts
Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers. > Parts > Parts
Duty Rate (from China)
Products classified under Tariff item 8402.90.00.00
Boiler Economizer Module
A boiler economizer module is a heat recovery module installed in boiler exhaust stacks to preheat feedwater using waste gases from steam generation. This performance-enhancing part of vapor boilers falls under tariff item 8402.90.00.
8402.90.00Boiler Expansion Joint
A boiler expansion joint is a flexible connection, typically bellows-type or refractory-lined slip, that accommodates thermal expansion and contraction between boiler pressure parts and structural steel during steam generation cycles. This product is a dedicated part of steam or other vapour generating boilers, falling under tariff item 8402.90.00 as a component of the boiler system.
8402.90.00Boiler Feedwater Pump Impeller
This specialized impeller is designed for multistage boiler feedwater pumps, delivering high-pressure water to steam boilers. While pumps themselves fall under heading 84.13, this impeller is a dedicated part of the boiler system and is classified under tariff item 8402.90.00 as a part of steam generating boilers.
8402.90.00Boiler Fire Tube Replacement
A replacement fire tube designed for insertion into industrial steam generating boilers to facilitate heat transfer from combustion gases to water. It falls under tariff item 8402.90.00 as a specific part of vapour generating boilers.
8402.90.00Boiler Firetube Replacement
A boiler firetube is a critical heat exchanger tube used in fire-tube boilers to transfer heat from combustion gases to water, generating steam. This replacement tube is a dedicated part of steam generating boilers and falls under tariff item 8402.90.00.
8402.90.00Boiler Handhole Door Assembly
A small access door assembly for inspecting boiler tubes through hand-sized openings in drum walls. It is classified under tariff item 8402.90.00 for water-tube boiler maintenance parts.
8402.90.00Boiler Manway Door Assembly
A boiler manway door assembly provides access for boiler tube inspection and maintenance in steam generating pressure vessels. This assembly, including gasket, bolts, and davit, is a dedicated part of steam generating boilers, classified under tariff item 8402.90.00.
8402.90.00Boiler Refractory Brick Set
High-alumina refractory bricks shaped for furnace walls in industrial steam boilers to withstand extreme combustion temperatures. Sold as sets for tariff item 8402.90.00 boiler parts.
8402.90.00Boiler Refractory Lining Kit
A boiler refractory lining kit protects boiler pressure parts from combustion flame and hot gases in steam generating units. This specialized insulation kit, including high-alumina castable mixes and anchor systems, is a dedicated part of steam generating boilers under tariff item 8402.90.00.
8402.90.00Boiler Safety Valve
A boiler safety valve automatically relieves excess boiler pressure to prevent explosion, and is mandatory for steam generating boilers. This safety device is integral to boiler operation and is classified under tariff item 8402.90.00 as a part of steam generating boilers, with ASME Section I certification.
8402.90.00Boiler Safety Valve Mounting Block
A machined steel block with valve seat for mounting ASME safety valves on steam boiler drums. It is classified under tariff item 8402.90.00 as a critical safety component for pressure vessels.
8402.90.00Boiler Sootblower Lance
A retractable cleaning lance that extends into boiler gas passes to remove soot deposits during operation. It is a mechanical cleaning part for industrial steam boilers under tariff item 8402.90.00.
8402.90.00Boiler Superheater Tube Bundle
A boiler superheater tube bundle increases steam temperature above saturation point, improving turbine efficiency in power generation boilers. This dedicated boiler part, made of high-alloy construction to resist creep at elevated temperatures, falls under tariff item 8402.90.00.
8402.90.00Boiler Waterside Economizer
A boiler waterside economizer preheats boiler feedwater using residual flue gas heat, improving overall efficiency of steam generating boilers. This product is recognized as a boiler part under tariff item 8402.90.00 due to its integral role in vapor generating systems.
8402.90.00Burner Mounting Refractory Thimble
A cylindrical refractory sleeve that protects boiler casing where fuel burners penetrate furnace walls. It is an essential part for safe combustion in vapour generating boilers under tariff item 8402.90.00.
8402.90.00Burner Windbox Assembly
A burner windbox assembly distributes combustion air to boiler burners, optimizing fuel-air mixture for efficient steam generation. This specialized boiler combustion system part, including dampers and supports, is classified under tariff item 8402.90.00.
8402.90.00Crystal Boule Cooling Zone Heat Exchanger
This heat exchanger controls the cooling gradient in the post-growth zone of semiconductor crystal pullers, preventing thermal stress in silicon boules. It is classified under tariff item 8402.90.00 as a part of vapour generating boiler systems used in wafer manufacturing.
8402.90.00Czochralski Crystal Puller Heat Exchanger
This heat exchanger is a critical component of Czochralski crystal growers used in semiconductor wafer manufacturing, controlling the temperature of the melt during monocrystalline silicon boule pulling. It falls under tariff item 8402.90.00 as a part of vapour generating boiler systems.
8402.90.00Deaerator Tray Stack
A deaerator tray stack is a stainless steel internal component used in deaerators to remove dissolved oxygen from boiler feedwater, preventing corrosion in steam generating systems. It is classified under tariff item 8402.90.00 as a part of steam or other vapour generating boilers.
8402.90.00Downcomer Pipe Assembly
Downcomer pipes circulate unheated water from the steam drum to boiler lower headers in natural circulation systems. These dedicated circulation components, made of heavy wall seamless construction, are covered under tariff item 8402.90.00 as parts of steam generating boilers.
8402.90.00Downcomer Pipe Section
A large-diameter pipe that circulates hot water from boiler drum to lower mud drum in water-tube steam boilers. It is classified under tariff item 8402.90.00 for its role in vapour generating systems.
8402.90.00Float Zone Crystal Grower Heat Exchanger
Designed for float zone method crystal growers, this heat exchanger manages RF heating zone temperatures in semiconductor boule production from polysilicon feedstock. It is classified under tariff item 8402.90.00 for its role in supporting vapour generating systems.
8402.90.00Gallium Arsenide Crystal Puller Heat Exchanger
A specialized heat exchanger for compound semiconductor (GaAs) crystal pullers using the Czochralski method, managing high-temperature vapour flows in the growth chamber. It falls under tariff item 8402.90.00 as a boiler part for semiconductor manufacturing.
8402.90.00Mud Drum Access Manway
A circular access port with bolted cover for cleaning sediment from lower mud drums in water-tube boilers. It is classified under tariff item 8402.90.00 for steam boiler maintenance parts.
8402.90.00Mud Drum for Water Tube Boiler
A mud drum for water tube boilers collects sediment and sludge from boiler bottom circulation, preventing tube fouling in water-tube steam generators. This part, including cleanout doors and blowdown valves, is classified under tariff item 8402.90.00 for vapor generating boilers.
8402.90.00Silicon Wafer Processing Boiler Heat Exchanger
A heat exchanger for boilers in silicon wafer growth systems, precisely controlling vapour temperatures during monocrystalline boule formation for semiconductor fabrication. Tariff item 8402.90.00 applies as parts of vapour generating boilers.
8402.90.00Steam Boiler Expansion Joint
A bellows-type expansion joint absorbing thermal movement between boiler sections in high-pressure steam systems. It is a specific part for tariff item 8402.90.00 vapour generating boilers.
8402.90.00Steam Boiler Pressure Vessel Door
A heavy-duty access door designed for high-pressure steam boiler vessels, featuring reinforced flanges and pressure seals to ensure safe maintenance access. It is an essential component for vapour generating boilers, falling under the parts provision of heading 84.02.
8402.90.00Steam Drum Assembly
A steam drum assembly separates steam from water in boiler circulation systems, essential for dry steam production in vapor generating boilers. This core pressure vessel component, featuring internal separators and dryers, is classified under tariff item 8402.90.00.
8402.90.00Steam Drum Internals Assembly
An assembly of baffles, separators, and dryers installed inside boiler steam drums to remove moisture from generated steam, ensuring high-quality steam output. This is a specific part for vapour generating boilers of heading 84.02, classified under the parts tariff item.
8402.90.00Steam Generating Boiler Grate
Boiler grates support the solid fuel bed and admit combustion air in traveling grate steam boilers. This heat-resistant cast iron or alloy construction part is classified under tariff item 8402.90.00 as fuel burning equipment for steam generating boilers.
8402.90.00Super-Heater Coil Assembly
A coiled tubing assembly that superheats steam within vapour generating boilers to increase thermal efficiency and energy output. This component is specifically designed for boilers of heading 84.02 and is classified as a part under tariff item 8402.90.00.
8402.90.00Tube Sheet for Boiler Headers
Forged tube sheets with drilled holes secure boiler tubes in headers for steam/water separation. These critical pressure boundary parts, made of high-strength carbon or alloy steel, are classified under tariff item 8402.90.00 as parts of steam generating boilers.
8402.90.00Water Column Mounting Flange
A specialized flange used to attach water level gauge columns to steam boiler drums, ensuring accurate water level monitoring for safe operation. This is a part of vapour generating boilers, classified under the parts tariff item 8402.90.00.