HS Code for Heat Exchanger Parts
The HS Code for heat exchanger parts is 841990. The MFN duty rate for importing to the US is 2.2%.
| HS Code (6-digit) | 841990 |
|---|---|
| US Duty Rate (MFN) | 2.2% |
| EU Duty Rate (MFN) | 2.7% |
| Chapter | 84 |
| Heading | 8419 |
| Last Updated | 2026-05 |
Description
Parts of heat exchange equipment
HS Code 841990 covers parts for heat exchange equipment with a US MFN duty rate of 2.2%.
Frequently Asked Questions
How does the material composition of a heat exchanger part affect its classification under HTS 841990?
The material is critical for determining whether a part is classifiable under 841990. For example, tubes or plates made of iron or steel for condensers fall here, but if the same parts are made of certain aluminum alloys, they may be classified elsewhere, such as in heading 7611 for aluminum structures. Always verify the specific metal's heading exclusions in the HTSUS Chapter 84 notes.
For imports of heat exchanger parts under HTS 841990, what specific documentation issues commonly trigger customs inspections and delays?
Customs authorities frequently inspect shipments of heat exchanger parts due to incomplete or inconsistent documentation that fails to prove the parts are for heat exchange equipment. A common trigger is a vague commercial invoice description (e.g., 'metal parts') that does not explicitly link the components to heat exchangers, raising concerns over potential misclassification. To mitigate risk, ensure packing lists and invoices specify 'Parts for heat exchangers' and reference the applicable HTS 841990.
What additional customs duties or fees are typically assessed on imported Heat Exchanger Parts (HTS 841990) beyond the basic tariff rate?
Imported heat exchanger parts under HTS 841990 are generally subject to a Merchandise Processing Fee (MPF) and may be liable for a Harbor Maintenance Fee (HMF) if arriving by vessel. A crucial additional cost is Section 301 tariffs, which currently impose a 25% additional duty on many heat exchanger parts originating from China, significantly increasing the landed cost.
Material Variants for Heat Exchanger Parts
The material of construction is critical for classification. Parts made of cast iron or cast steel, such as end caps or bonnets, are specifically classified under subheading 8419.90.05. Parts made of other materials, including aluminum, copper, or stainless steel, are generally classified under the broader 8419.90.08. However, certain specialized parts, like tubes or plates for plate-type heat exchangers, may be classified elsewhere based on their material and form, such as in heading 7419 for copper or 7609 for aluminum. Always verify the specific subheading based on both the part's function and its constituent material.
Alternative & Related HTS Classifications
Parts for heat exchangers (8419.90) are frequently confused with parts for other conditioning machinery. Most notably, parts for air conditioning machines (HTS 8415.90) are distinct, as Heading 8419 covers machinery for liquid-to-liquid or liquid-to-gas heat exchange, not gas-to-gas conditioning. Additionally, simple tubes and pipes made of base metal, even if used in heat exchangers, may be classified in Chapter 73 (e.g., 7306) or Chapter 74-83 if made of specific metals, unless they are identifiable as specific parts of the machine. Always verify the chapter notes to determine if an article is a 'part' for classification purposes.
Related HS Codes
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