Economizer Tube Bundle
A heat exchanger assembly consisting of finned tubes designed to recover waste heat from flue gases in boiler systems, preheating feedwater to improve efficiency. It is classified under HTS 8404.90.00.00 as a part of auxiliary plant for boilers of headings 8402 or 8403. This component enhances overall thermal performance in steam power units.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used in industrial heat recovery systems not tied to boilers
Machinery for heat recovery not specifically auxiliary to 8402/8403 boilers falls under other machinery parts.
If imported as standalone boiler tubes without assembly
Unfinned or unfinished steel tubes are classified by material in Chapter 73, not as functional auxiliary parts.
If sold as part of a complete industrial heating plant set
Parts of unlisted industrial machinery sets may shift to Chapter 84 residual provisions.
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Import Tips & Compliance
• Verify compatibility with specific boiler models under headings 8402/8403 via technical specs to avoid misclassification
• Provide detailed engineering drawings and material certificates (e.g
• ASME-compliant steel) for valuation and origin determination
• Watch for anti-dumping duties on certain steel components; declare as 'parts of economizers' explicitly on commercial invoice
Related Products under HTS 8404.90.00.00
Superheater Coil Assembly
Coiled high-temperature alloy tubes that superheat saturated steam from boilers to increase energy content and efficiency in power generation. Classified as parts under HTS 8404.90.00.00 for auxiliary plant used with boilers of 8402 or 8403. Essential for turbine performance in steam power units.
Soot Blower Element
Retractable lance or rotary assembly with nozzles that inject steam or air to dislodge soot from boiler tubes, maintaining heat transfer efficiency. Falls under HTS 8404.90.00.00 as parts of auxiliary plant like soot removers for 8402/8403 boilers. Critical for preventing efficiency loss in fossil fuel plants.
Condenser Tube Sheet
Thick forged plate with precision-drilled holes to hold condenser tubes in steam power units, facilitating heat exchange for vapor condensation. Classified under HTS 8404.90.00.00 as parts of condensers for vapor power units. Used in nuclear and fossil power plants for efficiency.
Gas Recoverer Baffle Assembly
Perforated steel baffles directing flue gas flow through heat recovery surfaces in boiler auxiliary systems, maximizing energy extraction. Under HTS 8404.90.00.00 as parts of gas recoverers for 8402/8403 boilers. Improves waste heat utilization in industrial plants.
Steam Condenser Shell Section
Cylindrical pressure vessel section housing tube bundles in surface condensers for steam power units, designed to withstand vacuum conditions. HTS 8404.90.00.00 covers it as parts of condensers. Vital for Rankine cycle efficiency.
Boiler Soot Remover Motor Drive
Electric gearmotor unit powering retractable soot blowers in auxiliary boiler cleaning systems. Classified as parts under HTS 8404.90.00.00 for soot removers used with 8402/8403 boilers. Ensures automated maintenance in continuous operation plants.