{
  "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. National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country).",
  "updatedAt": "2026-10-11",
  "facts": [
    {
      "label": "Chapter",
      "value": "84",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Description",
      "value": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Headings",
      "value": "86",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Subheadings",
      "value": "538",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Edition",
      "value": "HS2022",
      "source": "border.bot release GLOBAL:hs #2"
    }
  ],
  "faq": [
    {
      "question": "What does HS chapter 84 cover?",
      "answer": "HS chapter 84 covers nuclear reactors, boilers, machinery and mechanical appliances; parts thereof."
    },
    {
      "question": "How many headings and subheadings are in HS chapter 84?",
      "answer": "HS chapter 84 has 86 headings and 538 six-digit subheadings in HS2022."
    },
    {
      "question": "Which countries’ tariffs list national lines in HS chapter 84?",
      "answer": "National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country)."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this chapter covers",
      "text": [
        "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."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "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."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "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."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "National tariff lines under chapter 84 are live on border.bot for the United States (1,706 lines, also used by 1 other country)."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.",
        "This page was last updated on 11 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."
      ]
    }
  ],
  "data": {
    "type": "hs-chapter",
    "edition": "HS2022",
    "chapter": {
      "code": "84",
      "description": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof"
    },
    "headings": [
      {
        "code": "8401",
        "description": "Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear reactors; machinery and apparatus for isotopic separation",
        "subheadings": [
          {
            "code": "840110",
            "description": "Nuclear reactors"
          },
          {
            "code": "840120",
            "description": "Machinery and apparatus for isotopic separation, and parts thereof"
          },
          {
            "code": "840130",
            "description": "Fuel elements (cartridges), non-irradiated"
          },
          {
            "code": "840140",
            "description": "Parts of nuclear reactors"
          }
        ]
      },
      {
        "code": "8402",
        "description": "Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers",
        "subheadings": [
          {
            "code": "840211",
            "description": "Steam or other vapour generating boilers: Watertube boilers with a steam production exceeding 45t per hour"
          },
          {
            "code": "840212",
            "description": "Steam or other vapour generating boilers: Watertube boilers with a steam production not exceeding 45t per hour"
          },
          {
            "code": "840219",
            "description": "Steam or other vapour generating boilers: Other vapour generating boilers, including hybrid boilers"
          },
          {
            "code": "840220",
            "description": "Super-heated water boilers"
          },
          {
            "code": "840290",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8403",
        "description": "Central heating boilers other than those of heading 84.02",
        "subheadings": [
          {
            "code": "840310",
            "description": "Boilers"
          },
          {
            "code": "840390",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8404",
        "description": "Auxiliary plant for use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapour power units",
        "subheadings": [
          {
            "code": "840410",
            "description": "Auxiliary plant for use with boilers of heading 84.02 or 84.03"
          },
          {
            "code": "840420",
            "description": "Condensers for steam or other vapour power units"
          },
          {
            "code": "840490",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8405",
        "description": "Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers",
        "subheadings": [
          {
            "code": "840510",
            "description": "Producer gas or water gas generators, with or without their purifiers; acetylene gas generators and similar water process gas generators, with or without their purifiers"
          },
          {
            "code": "840590",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8406",
        "description": "Steam turbines and other vapour turbines",
        "subheadings": [
          {
            "code": "840610",
            "description": "Turbines for marine propulsion"
          },
          {
            "code": "840681",
            "description": "Other turbines: Of an output exceeding 40 MW"
          },
          {
            "code": "840682",
            "description": "Other turbines: Of an output not exceeding 40 MW"
          },
          {
            "code": "840690",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8407",
        "description": "Spark-ignition reciprocating or rotary internal combustion piston engines",
        "subheadings": [
          {
            "code": "840710",
            "description": "Aircraft engines"
          },
          {
            "code": "840721",
            "description": "Marine propulsion engines: Outboard motors"
          },
          {
            "code": "840729",
            "description": "Marine propulsion engines: Other"
          },
          {
            "code": "840731",
            "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity not exceeding 50 cc"
          },
          {
            "code": "840732",
            "description": "Reciprocating 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"
          },
          {
            "code": "840733",
            "description": "Reciprocating 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"
          },
          {
            "code": "840734",
            "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 1,000 cc"
          },
          {
            "code": "840790",
            "description": "Other engines"
          }
        ]
      },
      {
        "code": "8408",
        "description": "Compression-ignition internal combustion piston engines (diesel or semi-diesel engines)",
        "subheadings": [
          {
            "code": "840810",
            "description": "Marine propulsion engines"
          },
          {
            "code": "840820",
            "description": "Engines of a kind used for the propulsion of vehicles of Chapter 87"
          },
          {
            "code": "840890",
            "description": "Other engines"
          }
        ]
      },
      {
        "code": "8409",
        "description": "Parts suitable for use solely or principally with the engines of heading 84.07 or 84.08",
        "subheadings": [
          {
            "code": "840910",
            "description": "For aircraft engines"
          },
          {
            "code": "840991",
            "description": "Other: Suitable for use solely or principally with spark-ignition internal combustion piston engines"
          },
          {
            "code": "840999",
            "description": "Other: Other"
          }
        ]
      },
      {
        "code": "8410",
        "description": "Hydraulic turbines, water wheels, and regulators therefor",
        "subheadings": [
          {
            "code": "841011",
            "description": "Hydraulic turbines and water wheels: Of a power not exceeding 1,000 kW"
          },
          {
            "code": "841012",
            "description": "Hydraulic turbines and water wheels: Of a power exceeding 1,000 kW but not exceeding 10,000 kW"
          },
          {
            "code": "841013",
            "description": "Hydraulic turbines and water wheels: Of a power exceeding 10,000 kW"
          },
          {
            "code": "841090",
            "description": "Parts, including regulators"
          }
        ]
      },
      {
        "code": "8411",
        "description": "Turbo-jets, turbo-propellers and other gas turbines",
        "subheadings": [
          {
            "code": "841111",
            "description": "Turbojets: Of a thrust not exceeding 25 kN"
          },
          {
            "code": "841112",
            "description": "Turbojets: Of a thrust exceeding 25 kN"
          },
          {
            "code": "841121",
            "description": "Turbopropellers: Of a power not exceeding 1,100 kW"
          },
          {
            "code": "841122",
            "description": "Turbopropellers: Of a power exceeding 1,100 kW"
          },
          {
            "code": "841181",
            "description": "Other gas turbines: Of a power not exceeding 5,000 kW"
          },
          {
            "code": "841182",
            "description": "Other gas turbines: Of a power exceeding 5,000 kW"
          },
          {
            "code": "841191",
            "description": "Parts: Of turbo-jets or turbo-propellers"
          },
          {
            "code": "841199",
            "description": "Parts: Other"
          }
        ]
      },
      {
        "code": "8412",
        "description": "Other engines and motors",
        "subheadings": [
          {
            "code": "841210",
            "description": "Reaction engines other than turbo-jets"
          },
          {
            "code": "841221",
            "description": "Hydraulic power engines and motors: Linear acting (cylinders)"
          },
          {
            "code": "841229",
            "description": "Hydraulic power engines and motors: Other"
          },
          {
            "code": "841231",
            "description": "Pneumatic power engines and motors: Linear acting (cylinders)"
          },
          {
            "code": "841239",
            "description": "Pneumatic power engines and motors: Other"
          },
          {
            "code": "841280",
            "description": "Other"
          },
          {
            "code": "841290",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8413",
        "description": "Pumps for liquids, whether or not fitted with a measuring device; liquid elevators",
        "subheadings": [
          {
            "code": "841311",
            "description": "Pumps 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"
          },
          {
            "code": "841319",
            "description": "Pumps fitted or designed to be fitted with a measuring device: Other"
          },
          {
            "code": "841320",
            "description": "Hand pumps, other than those of subheading 8413.11 or 8413.19"
          },
          {
            "code": "841330",
            "description": "Fuel, lubricating or cooling medium pumps for internal combustion piston engines"
          },
          {
            "code": "841340",
            "description": "Concrete pumps"
          },
          {
            "code": "841350",
            "description": "Other reciprocating positive displacement pumps"
          },
          {
            "code": "841360",
            "description": "Other rotary positive displacement pumps"
          },
          {
            "code": "841370",
            "description": "Other centrifugal pumps"
          },
          {
            "code": "841381",
            "description": "Other pumps; liquid elevators: Pumps"
          },
          {
            "code": "841382",
            "description": "Other pumps; liquid elevators: Liquid elevators"
          },
          {
            "code": "841391",
            "description": "Parts: Of pumps"
          },
          {
            "code": "841392",
            "description": "Parts: Of liquid elevators"
          }
        ]
      },
      {
        "code": "8414",
        "description": "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",
        "subheadings": [
          {
            "code": "841410",
            "description": "Vacuum pumps"
          },
          {
            "code": "841420",
            "description": "Hand- or foot-operated air pumps"
          },
          {
            "code": "841430",
            "description": "Compressors of a kind used in refrigerating equipment"
          },
          {
            "code": "841440",
            "description": "Air compressors mounted on a wheeled chassis for towing"
          },
          {
            "code": "841451",
            "description": "Fans: Table, floor, wall, window, ceiling or roof fans, with a self- contained electric motor of an output not exceeding 125 W"
          },
          {
            "code": "841459",
            "description": "Fans: Other"
          },
          {
            "code": "841460",
            "description": "Hoods having a maximum horizontal side not exceeding 120cm"
          },
          {
            "code": "841470",
            "description": "Gas-tight biological safety cabinets"
          },
          {
            "code": "841480",
            "description": "Other"
          },
          {
            "code": "841490",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8415",
        "description": "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",
        "subheadings": [
          {
            "code": "841510",
            "description": "Of a kind designed to be fixed to a window, wall, ceiling or floor, self-contained or “split-system”"
          },
          {
            "code": "841520",
            "description": "Of a kind used for persons, in motor vehicles"
          },
          {
            "code": "841581",
            "description": "Other: Incorporating a refrigerating unit and a valve for reversal of the cooling/heat cycle (reversible heat pumps)"
          },
          {
            "code": "841582",
            "description": "Other: Other, incorporating a refrigerating unit"
          },
          {
            "code": "841583",
            "description": "Other: Not incorporating a refrigerating unit"
          },
          {
            "code": "841590",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8416",
        "description": "Furnace burners for liquid fuel, for pulverised solid fuel or for gas; mechanical stokers, including their mechanical grates, mechanical ash dischargers and similar appliances",
        "subheadings": [
          {
            "code": "841610",
            "description": "Furnace burners for liquid fuel"
          },
          {
            "code": "841620",
            "description": "Other furnace burners, including combination burners"
          },
          {
            "code": "841630",
            "description": "Mechanical stokers, including their mechanical grates, mechanical ash dischargers and similar appliances"
          },
          {
            "code": "841690",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8417",
        "description": "Industrial or laboratory furnaces and ovens, including incinerators, non-electric",
        "subheadings": [
          {
            "code": "841710",
            "description": "Furnaces and ovens for the roasting, melting or other heat-treatment of ores, pyrites or of metals"
          },
          {
            "code": "841720",
            "description": "Bakery ovens, including biscuit ovens"
          },
          {
            "code": "841780",
            "description": "Other"
          },
          {
            "code": "841790",
            "description": "Parts"
          }
        ]
      },
      {
        "code": "8418",
        "description": "Refrigerators, freezers and other refrigerating or freezing equipment, electric or other; heat pumps other than air conditioning machines of heading 84.15",
        "subheadings": [
          {
            "code": "841810",
            "description": "Combined refrigerator-freezers, fitted with separate external doors or drawers, or combinations thereof"
          },
          {
            "code": "841821",
            "description": "Refrigerators, household type: Compression-type"
          },
          {
            "code": "841829",
            "description": "Refrigerators, household type: Other"
          },
          {
            "code": "841830",
            "description": "Freezers of the chest type, not exceeding 800l capacity"
          },
          {
            "code": "841840",
            "description": "Freezers of the upright type, not exceeding 900l capacity"
          },
          {
            "code": "841850",
            "description": "Other furniture (chests, cabinets, display counters, show-cases and the like) for storage and display, incorporating refrigerating or freezing equipment"
          },
          {
            "code": "841861",
            "description": "Other refrigerating or freezing equipment; heat pumps: Heat pumps other than air conditioning machines of heading 84.15"
          },
          {
            "code": "841869",
            "description": "Other refrigerating or freezing equipment; heat pumps: Other"
          },
          {
            "code": "841891",
            "description": "Parts: Furniture designed to receive refrigerating or freezing equipment"
          },
          {
            "code": "841899",
            "description": "Parts: Other"
          }
        ]
      },
      {
        "code": "8419",
        "description": "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",
        "subheadings": [
          {
            "code": "841911",
            "description": "Instantaneous or storage water heaters, non-electric: Instantaneous gas water heaters"
          }
        ]
      }
    ],
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      "code": "83",
      "description": "Miscellaneous articles of base metal",
      "indexable": true
    },
    "next": {
      "code": "85",
      "description": "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",
      "indexable": true
    },
    "schedules": [
      {
        "code": "US",
        "name": "United States",
        "slug": "united-states",
        "lines": 1706,
        "members": 1
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    ],
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        "dataset": "GLOBAL:hs",
        "country": "GLOBAL",
        "kind": "hs",
        "seq": 2,
        "version": "mytraddal hs2022.csv (HS 2022)",
        "liveAt": "2026-10-11T06:04:17.693Z",
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  "code": "84",
  "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.",
  "terms": "https://border.bot/legal/terms",
  "notice": "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.",
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