HS Code for Particulate filter

Particulate filters, particularly those used for purifying exhaust gases from internal combustion engines, are classified under HS code 8421.32. Chapter 84 includes machinery for various industrial processes, and heading 8421 specifically covers centrifuges, including centrifugal dryers, and filtering or purifying machinery and apparatus for liquids or gases. Within this heading, subheading 8421.32 is reserved for catalytic converters or particulate filters for exhaust gases. This classification is driven by the function of the device, which is to remove particulate matter (such as soot) from the exhaust stream of a vehicle or stationary engine. Following GRI 1, the heading and subheading descriptions are the primary authority. This code is critical for environmental regulation and trade, as it separates emission control technology from general air filters (8421.31) or liquid filters (8421.23). The hardware must be specifically designed for exhaust gas treatment to be classified here; general gas filtering equipment for industrial HVAC systems would fall under 8421.39. The classification remains the same whether the filter is made of ceramic cordierite, silicon carbide, or metallic fibers.

Products Included

• Diesel Particulate Filters (DPF)
• Gasoline Particulate Filters (GPF)
• Combined catalytic converters and particulate filters
• Soot traps for heavy-duty engine exhaust
• Exhaust gas purifiers for industrial generators

Common Misclassification

Particulate filters are often confused with 8421.31, which is strictly for intake air filters for internal combustion engines. They are also sometimes incorrectly placed in 8421.39, which is the residual category for other gas filtering apparatus that do not treat engine exhaust.

FAQ

What is the HS code for Particulate filter?

The HS code for particulate filters used in exhaust systems is 8421.32.

Does this code include the housing and sensors?

If the sensors are integrated into the filter unit as a single functional apparatus, they are classified under 8421.32. Separate sensors are usually classified in Chapter 90.