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United States Customs Tariff for HS Code 841990

Machinery, plant and laboratory equipment; parts of equipment for treating materials by a process involving a change of temperature

USITC 2026 HTS Revision 19

26,806 official source entries are searchable. Checked 2026-09-22; edition published 2026-09-15.

Printed tariff and statistical lines from this edition, separate from historical WITS averages. Blank duty cells are not a confirmed zero. Review the parent tariff line, general and chapter notes, chapter 99, origin, exclusions, quotas and additional duties. No shipment total or special-rate eligibility is calculated. The edition publication date is not a line-level effective date.

Official schedule and source documentation

Official entries matching 841990

8419.90.10.00

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts:

Of instantaneous or storage water heaters

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
45%
Official source for this code

8419.90.20.00

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts:

Of machinery and plant for making paper pulp, paper or paperboard

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
35%
Official source for this code

8419.90.30.00

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts:

Of heat exchange units

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
35%
Official source for this code

8419.90.50

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other:

Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
35%
Official source for this code

8419.90.50.40

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other: › Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers

Of medical, surgical or laboratory sterilizers

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 8419.90.50 — read its printed duties and notes

Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 35%
Open parent line in the official schedule
Official source for this code

8419.90.50.80

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other: › Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers

Other

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 8419.90.50 — read its printed duties and notes

Of molten-salt-cooled acrylic acid reactors; of medical, surgical or laboratory sterilizers

  • Column 1 — General: Free
  • Column 1 — Special (eligibility required): No amount printed.
  • Column 2: 35%
Open parent line in the official schedule
Official source for this code

8419.90.85.00

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other:

Of electromechanical tools for working in the hand with self-contained electric motor

Source units: kg

Column 1 — General
Free
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
35%
Official source for this code

8419.90.95

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other:

Other

Column 1 — General
4%
Column 1 — Special (eligibility required)
Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
Column 2
35%
Official source for this code

8419.90.95.20

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other: › Other

Of an apparatus of a type used in restaurants, hotels or similar locations

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 8419.90.95 — read its printed duties and notes

Other

  • Column 1 — General: 4%
  • Column 1 — Special (eligibility required): Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
  • Column 2: 35%
Open parent line in the official schedule
Official source for this code

8419.90.95.80

Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 8514), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilizing, pasteurizing, steaming, drying, evaporating, vaporizing, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, nonelectric; parts thereof: › Parts: › Other: › Other

Other

Source units: kg

Column 1 — General
No amount printed on this row; not a confirmed zero.
Column 1 — Special (eligibility required)
No amount printed on this row; not a confirmed zero.
Column 2
No amount printed on this row; not a confirmed zero.
Parent tariff line 8419.90.95 — read its printed duties and notes

Other

  • Column 1 — General: 4%
  • Column 1 — Special (eligibility required): Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
  • Column 2: 35%
Open parent line in the official schedule
Official source for this code
WITS 2023 historical MFN average

Reported average: 0.666666686534882%.

Source year: 2023. Classification: HS 2022 (H6). Checked 2026-09-14.

National lines included: 6 of 6. Excluded from the average: 0.

Reported ad-valorem range: 0%–4%.

Reported historical ad-valorem MFN simple average for 2023, not a national tariff schedule. No preferential rates, additional duties, VAT, excise or import permissions are determined.

Not a current 2026 national duty. The HS6 average does not determine the duty of a particular national subdivision, origin or shipment.

WITS observation for this code and year

UN Comtrade H6 descriptions (HS 2022)

WITS API definitions: reported averages and excluded national lines

Direct HS code answer for United States

United States HS Code 841990: 0.67% (2023 MFN average)

The source reports an indicative HS6 MFN average of 0.67% (2023 MFN average) for Machinery, plant and laboratory equipment; parts of equipment for treating materials by a process involving a change of temperature.Source status: not assessed. Verify the exact national tariff line, origin treatment, taxes, restrictions, and current customs guidance before using this information in a declaration.

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Customs tariff summary

Country
United States
HS / tariff code
841990
Description
Machinery, plant and laboratory equipment; parts of equipment for treating materials by a process involving a change of temperature
Chapter
84 —
Heading
8419
Subheading
841990
Indicative MFN HS6 average
0.67% (2023 MFN average)
VAT / tax
Check local VAT and excise rules for the import destination.
Unit / basis
Not listed in this tariff line
Source / vintage
WITS / UNCTAD TRAINS — 2023 MFN HS6 reference

Historical MFN average

0.67% (2023 MFN average)

Import permission

not assessed

Import planning

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Details

HS Code
841990
Chapter
84 —
Heading
8419
Subheading
841990

Compare HS code 841990 across GCC countries

Each destination shows its own source label. Oman uses its national schedule; Qatar and UAE entries may cite their separately published references and unresolved exceptions. Other entries retain the historical GCC reference. National codes, duty notes, restrictions and tax treatment can differ; verify with the destination customs authority.

Saudi ArabiaSearch parent HS 841990United Arab EmiratesSearch parent HS 841990OmanSearch parent HS 841990QatarSearch parent HS 841990KuwaitSearch parent HS 841990BahrainSearch parent HS 841990

Related HS Codes (Heading 8419)

HS CodeDescriptionDuty
841911Heaters; instantaneous gas water heaters, for domestic or other purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841912Heaters; solar water heaters, non-electric0.00% (2023 MFN average)WITS 2023 historical MFN average
841919Heaters; instantaneous or storage water heaters, non-electric, (other than instantaneous gas or solar water heaters)0.00% (2023 MFN average)WITS 2023 historical MFN average
841920Sterilizers; for medical, surgical or laboratory use, not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841933Dryers; lyophilisation apparatus, freeze drying units and spray dryers, not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841934Dryers; for agricultural products, not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841935Dryers; for wood, paper pulp, paper or paperboard, not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841939Dryers; for products n.e.c. in heading no. 8419, not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841940Distilling or rectifying plant; not used for domestic purposes0.00% (2023 MFN average)WITS 2023 historical MFN average
841950Heat exchange units; not used for domestic purposes2.10% (2023 MFN average)WITS 2023 historical MFN average
841960Machinery; for liquefying air or gas, not used for domestic purposes2.10% (2023 MFN average)WITS 2023 historical MFN average
841981Machinery, plant and equipment; for making hot drinks, for cooking or heating food0.00% (2023 MFN average)WITS 2023 historical MFN average
841989Machinery, plant and laboratory equipment; for treating materials by change of temperature, other than for making hot drinks or cooking or heating food1.40% (2023 MFN average)WITS 2023 historical MFN average

Data source: WITS/UNCTAD TRAINS (MFN 2022). Values are indicative HS6 MFN averages, not shipment-specific applied rates. Import permission and restrictions are not assessed. Historical reference rates exclude VAT, excise and other national measures. Separate national entries preserve the columns printed by their source; these are not a complete shipment assessment. Full disclaimer.