Stainless Steel Economizer Coils
Corrosion-resistant stainless steel helical coils specifically designed for economizer service in biomass boilers, recovering heat from flue gas. These coils are engineered for the demanding conditions of biomass combustion. They are classified under tariff item 8404.10.00 as auxiliary plant for boilers.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the coils are presented as unfinished tubes rather than as complete economizer components
Stainless steel tubes are classified in Chapter 73 when not identifiable as parts of auxiliary boiler plant.
If the coils are used in a heat exchange application not specific to boilers
Heat exchange units fall under heading 84.19.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide documentation showing the coils are specifically designed for economizer service in biomass boilers
• Keep material certificates (e.g
• stainless steel grade) available for CBSA inspection
• Confirm if the coils are subject to any import restrictions related to biomass boiler components
Related Products under Tariff item 8404.10.00
Boiler Air Preheater
> A rotary or tubular device that preheats combustion air using heat recovered from boiler flue gas, reducing fuel consumption. It is designed for direct integration with boilers of heading 84.02 or 84.03 and qualifies as auxiliary plant under tariff item 8404.10.00.
Boiler Draft Fan Silencer
An acoustic silencer designed for induced draft fans in boiler systems, reducing noise while maintaining required draft pressure differentials. This silencer is auxiliary plant for boilers. It is classified under tariff item 8404.10.00 as auxiliary plant for use with boilers of heading 84.02 or 84.03.
Boiler Economizer
> A heat recovery device installed in the flue gas path of steam boilers (headings 84.02 or 84.03) to preheat feedwater using residual heat from exhaust gases. It improves overall boiler efficiency and is explicitly covered as auxiliary plant under tariff item 8404.10.00.
Boiler Economizer Bypass Damper
A heavy-duty damper system that controls flue gas flow around economizers for temperature regulation, critical for safe operation during startup and load changes. This bypass damper is auxiliary plant for boilers. It is classified under tariff item 8404.10.00 as auxiliary plant for use with boilers.
Boiler Feedwater Preheater
A shell-and-tube preheater that uses extracted steam to raise feedwater temperature before it enters the boiler, reducing thermal shock and improving cycle efficiency. This feedwater preheater is auxiliary plant for boilers. It is classified under tariff item 8404.10.00 as auxiliary plant for use with boilers.
Boiler Superheater
> A component that heats steam beyond its saturation point after leaving the boiler drum, increasing energy content for turbine use in power generation. It is designed for use with boilers of heading 84.02 or 84.03 and qualifies as auxiliary plant under tariff item 8404.10.00.