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. > Steam or other vapour generating boilers: > Parts > Parts
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8402.90
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. It is a performance-enhancing part of vapor boilers, falling under the parts provision of this tariff item.
8402.90.00Boiler Expansion Joint
A boiler expansion joint is a flexible connection that accommodates thermal expansion and contraction between boiler pressure parts and structural steel during steam generation cycles. It is a dedicated component of a steam or other vapour generating boiler, falling under the parts provision of this tariff item.
8402.90.00Boiler Feedwater Pump Impeller
This specialized impeller is designed for multistage feedwater pumps that deliver high-pressure water to steam boilers. While pumps are generally classified under heading 84.13, this impeller is a dedicated part of a steam generating boiler system and is therefore classified under the parts provision of this tariff item.
8402.90.00Boiler Firetube Replacement
A firetube is a critical heat exchanger tube used in fire-tube boilers to transfer heat from combustion gases to water, generating steam. It is a dedicated part of a steam generating boiler and is classified under the parts provision of this tariff item.
8402.90.00Boiler Manway Door Assembly
A manway door assembly provides access for boiler tube inspection and maintenance in steam generating pressure vessels. It includes a gasket, bolts, and a davit assembly, and is a dedicated part of a steam generating boiler, falling under the parts provision of this tariff item.
8402.90.00Boiler Refractory Lining Kit
A refractory lining kit protects boiler pressure parts from combustion flame and hot gases in steam generating units. It includes high-alumina castable mixes and anchor systems, and is a dedicated part of a steam generating boiler, falling under the parts provision of this tariff item.
8402.90.00Boiler Safety Valve
A boiler safety valve automatically relieves excess boiler pressure to prevent explosion, and is mandatory for steam generating boilers. It is a safety device integral to boiler operation, falling under the parts provision of this tariff item.
8402.90.00Boiler Superheater Tube Bundle
Superheater tube bundles increase steam temperature above saturation point, improving turbine efficiency in power generation boilers. They are dedicated boiler parts made of high-alloy construction to resist creep at elevated temperatures, falling under the parts provision of this tariff item.
8402.90.00Boiler Waterside Economizer
A waterside economizer preheats boiler feedwater using residual flue gas heat, improving overall efficiency of steam generating boilers. It is recognized as a boiler part due to its integral role in vapor generation, falling under the parts provision of this tariff item.
8402.90.00Burner Windbox Assembly
A burner windbox assembly distributes combustion air to boiler burners, optimizing fuel-air mixture for efficient steam generation. It is a specialized boiler combustion system part, including dampers and supports, falling under the parts provision of this tariff item.
8402.90.00Downcomer Pipe Assembly
Downcomer pipes circulate unheated water from the steam drum to boiler lower headers in natural circulation systems. They are dedicated circulation components of steam generating boilers, made of heavy wall seamless construction, falling under the parts provision of this tariff item.
8402.90.00Mud Drum for Water Tube Boiler
Mud drums collect sediment and sludge from boiler bottom circulation, preventing tube fouling in water-tube steam generators. They include cleanout doors and blowdown valves, and are parts for vapor generating boilers, falling under the parts provision of this tariff item.
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. It is a core pressure vessel component with internal separators and dryers, falling under the parts provision of this tariff item.
8402.90.00Steam Generating Boiler Grate
Boiler grates support the solid fuel bed and admit combustion air in traveling grate steam boilers. They are parts for fuel burning equipment in steam generating boilers, made of heat-resistant cast iron or alloy, falling under the parts provision of this tariff item.
8402.90.00Tube Sheet for Boiler Headers
Forged tube sheets with drilled holes secure boiler tubes in headers for steam/water separation. They are critical pressure boundary parts of steam generating boilers, made of high-strength carbon or alloy steel, falling under the parts provision of this tariff item.