HTS tariff line · chapter 84
8421.39.01
Filtering or purifying machinery and apparatus for gases: other
Analysis
HTS 8421.39.01 covers filtering or purifying machinery and apparatus for gases: other under heading 8421 (centrifuges, including centrifugal dryers; filtering or purifying machinery and…). US Customs collects import statistics for it under 7 ten-digit suffixes, reported in kilograms.
Within this group the rate runs from duty-free to 2.5%. Compared with 8421.31.00 (intake air filters for internal combustion engines), which pays 2.5%, a misclassification either way moves the duty by 2.5 percentage points.
Goods from countries without normal trade relations pay the column 2 rate of 35% instead of nothing, so origin decides between free entry and a 35% duty.
The normal trade relations rate here is zero, shared by about 61% of the 823 tariff lines in chapter 84, a useful check when a neighbouring dutiable line is a candidate. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
The ten-digit suffixes separate for machine tools of headings 8456…, electrostatic precipitators, gas separation equipment and pneumatic fluid power filters, rated at…. The duty is the same across them; the suffix matters for statistics, licensing and some quotas, and an entry needs all ten digits.
Statistical suffixes
| Code | Description | Units | NAICS |
|---|---|---|---|
| 8421.39.01.05 | For machine tools of headings 8456 through 8465, inclusive | kg | 333413 |
| 8421.39.01.15 | Other | kg | 333413 |
| 8421.39.01.20 | Electrostatic precipitators | No. | 333413 |
| 8421.39.01.30 | Other | No. | 333413 |
| 8421.39.01.40 | Gas separation equipment | No. | 33399 |
| 8421.39.01.60 | Pneumatic fluid power filters, rated at 550 kPa or greater | No. | 33399 |
| 8421.39.01.90 | Other | kg | 33399 |
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 8421.11.00 | Centrifuges, including centrifugal dryers: cream separators | Free |
| 8421.12.00 | Centrifuges, including centrifugal dryers: clothes-dryers | Free |
| 8421.19.00 | Centrifuges, including centrifugal dryers: other | 1.3% |
| 8421.21.00 | For filtering or purifying water | Free |
| 8421.22.00 | For filtering or purifying beverages other than water | Free |
| 8421.23.00 | Oil or fuel filters for internal combustion engines | 2.5% |
| 8421.29.00 | Filtering or purifying machinery and apparatus for liquids: other | Free |
| 8421.31.00 | Intake air filters for internal combustion engines | 2.5% |
| 8421.32.00 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines | Free |
| 8421.91.20 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers | Free |
| 8421.91.40 | Furniture designed to receive the clothes-dryers of subheading 8421.12 | Free |
| 8421.91.60 | Of centrifuges, including centrifugal dryers: other | Free |
| 8421.99.01 | Parts: other | Free |