HS chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
Last updated
Key facts
- Chapter
- 84
- Description
- Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Headings
- 86
- Subheadings
- 538
- Edition
- HS2022
Summary
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022. Chapter 83, before it, covers miscellaneous articles of base metal; chapter 85, after it, covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles.
What this chapter covers
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
It has 86 headings, 84.01 to 84.87, and 538 six-digit subheadings in HS2022.
Subheadings 1 to 100 of 538, page 1 of 6.
84.02 Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers
- 8402.11Steam or other vapour generating boilers: Watertube boilers with a steam production exceeding 45t per hour
- 8402.12Steam or other vapour generating boilers: Watertube boilers with a steam production not exceeding 45t per hour
- 8402.19Steam or other vapour generating boilers: Other vapour generating boilers, including hybrid boilers
- 8402.20Super-heated water boilers
- 8402.90Parts
84.07 Spark-ignition reciprocating or rotary internal combustion piston engines
- 8407.10Aircraft engines
- 8407.21Marine propulsion engines: Outboard motors
- 8407.29Marine propulsion engines: Other
- 8407.31Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity not exceeding 50 cc
- 8407.32Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc
- 8407.33Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 250 cm3 but not exceeding 1 000 cm3
- 8407.34Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 1,000 cc
- 8407.90Other engines
84.11 Turbo-jets, turbo-propellers and other gas turbines
- 8411.11Turbojets: Of a thrust not exceeding 25 kN
- 8411.12Turbojets: Of a thrust exceeding 25 kN
- 8411.21Turbopropellers: Of a power not exceeding 1,100 kW
- 8411.22Turbopropellers: Of a power exceeding 1,100 kW
- 8411.81Other gas turbines: Of a power not exceeding 5,000 kW
- 8411.82Other gas turbines: Of a power exceeding 5,000 kW
- 8411.91Parts: Of turbo-jets or turbo-propellers
- 8411.99Parts: Other
84.12 Other engines and motors
- 8412.10Reaction engines other than turbo-jets
- 8412.21Hydraulic power engines and motors: Linear acting (cylinders)
- 8412.29Hydraulic power engines and motors: Other
- 8412.31Pneumatic power engines and motors: Linear acting (cylinders)
- 8412.39Pneumatic power engines and motors: Other
- 8412.80Other
- 8412.90Parts
84.13 Pumps for liquids, whether or not fitted with a measuring device; liquid elevators
- 8413.11Pumps fitted or designed to be fitted with a measuring device: Pumps for dispensing fuel or lubricants, of the type used in filling-stations or in garages
- 8413.19Pumps fitted or designed to be fitted with a measuring device: Other
- 8413.20Hand pumps, other than those of subheading 8413.11 or 8413.19
- 8413.30Fuel, lubricating or cooling medium pumps for internal combustion piston engines
- 8413.40Concrete pumps
- 8413.50Other reciprocating positive displacement pumps
- 8413.60Other rotary positive displacement pumps
- 8413.70Other centrifugal pumps
- 8413.81Other pumps; liquid elevators: Pumps
- 8413.82Other pumps; liquid elevators: Liquid elevators
- 8413.91Parts: Of pumps
- 8413.92Parts: Of liquid elevators
84.14 Air or vacuum pumps, air or other gas compressors and fans; ventilating or recycling hoods incorporating a fan, whether or not fitted with filters; gas-tight biological safety cabinets, whether or not fitted with filters
- 8414.10Vacuum pumps
- 8414.20Hand- or foot-operated air pumps
- 8414.30Compressors of a kind used in refrigerating equipment
- 8414.40Air compressors mounted on a wheeled chassis for towing
- 8414.51Fans: Table, floor, wall, window, ceiling or roof fans, with a self- contained electric motor of an output not exceeding 125 W
- 8414.59Fans: Other
- 8414.60Hoods having a maximum horizontal side not exceeding 120cm
- 8414.70Gas-tight biological safety cabinets
- 8414.80Other
- 8414.90Parts
84.15 Air conditioning machines, comprising a motor-driven fan and elements for changing the temperature and humidity, including those machines in which the humidity cannot be separately regulated
- 8415.10Of a kind designed to be fixed to a window, wall, ceiling or floor, self-contained or “split-system”
- 8415.20Of a kind used for persons, in motor vehicles
- 8415.81Other: Incorporating a refrigerating unit and a valve for reversal of the cooling/heat cycle (reversible heat pumps)
- 8415.82Other: Other, incorporating a refrigerating unit
- 8415.83Other: Not incorporating a refrigerating unit
- 8415.90Parts
84.18 Refrigerators, freezers and other refrigerating or freezing equipment, electric or other; heat pumps other than air conditioning machines of heading 84.15
- 8418.10Combined refrigerator-freezers, fitted with separate external doors or drawers, or combinations thereof
- 8418.21Refrigerators, household type: Compression-type
- 8418.29Refrigerators, household type: Other
- 8418.30Freezers of the chest type, not exceeding 800l capacity
- 8418.40Freezers of the upright type, not exceeding 900l capacity
- 8418.50Other furniture (chests, cabinets, display counters, show-cases and the like) for storage and display, incorporating refrigerating or freezing equipment
- 8418.61Other refrigerating or freezing equipment; heat pumps: Heat pumps other than air conditioning machines of heading 84.15
- 8418.69Other refrigerating or freezing equipment; heat pumps: Other
- 8418.91Parts: Furniture designed to receive refrigerating or freezing equipment
- 8418.99Parts: Other
84.19 Machinery, plant or laboratory equipment, whether or not electrically heated (excluding furnaces, ovens and other equipment of heading 85.14), for the treatment of materials by a process involving a change of temperature such as heating, cooking, roasting, distilling, rectifying, sterilising, pasteurising, steaming, drying, evaporating, vaporising, condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, non-electric
- 8419.11Instantaneous or storage water heaters, non-electric: Instantaneous gas water heaters
What it doesn’t cover
Chapter 83, before it, covers miscellaneous articles of base metal; chapter 85, after it, covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles.
How it is structured
Chapter 84 is the first level of the Harmonized System. Its headings add two digits to the chapter number (84.01), and each heading's subheadings add two more.
In other countries
No national tariff lines in chapter 84 are live on border.bot yet. Tariffs built on the Harmonized System use these headings and subheadings and add their own digits after the first six.
Frequently asked questions
What does HS chapter 84 cover?
HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof.
How many headings and subheadings are in HS chapter 84?
HS chapter 84 has 86 headings and 538 six-digit subheadings in HS2022.
Sources and updates
The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.
This page was last updated on 13 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.