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HSChapter 84
U.S. imports of high-capacity watertube boilers (over 45 tonnes/hour steam output) (HS 840211) totaled $14.8M in April 2026, traded with 4 countries.
Importers of High-Capacity Watertube Boilers (Over 45 Tonnes/Hour Steam Output) paid $2.2M in duties in April 2026 — an effective duty rate of 15% on $14.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. High-Capacity Watertube Boilers (Over 45 Tonnes/Hour Steam Output) imports of $14.8M in April 2026 ran 265% above the year-to-date monthly average of $4.0M.
Last updated: April 2026 dataWatertube boilers capable of generating more than 45 tonnes of steam per hour are large-scale industrial units used primarily in power generation, petrochemical refining, and heavy process industries. Classified under tariff line 8402110000, these units are distinguished from smaller watertube boilers by their output threshold — a specification that directly determines heading assignment. Given their size and weight, imports typically arrive as partially assembled modules, and importers should confirm that all sub-assemblies intended to form a single functional boiler are covered under a single entry to avoid misclassification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The dividing line is a steam production capacity of 45 tonnes per hour. Boilers exceeding that threshold classify under 8402110000; those at or below 45 t/hr fall under heading 840212. The rated capacity stated in the manufacturer's technical specification is the primary evidence used to determine which subheading applies.
When a single boiler is shipped in multiple consignments due to size constraints, US customs rules allow for treatment as a single article if the importer can demonstrate the shipments constitute one complete unit. Advance ruling requests or binding classification rulings from CBP can provide certainty before the first shipment arrives.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $10.0M | -- | -$10.0M |
| INDIA | $4.7M | -- | -$4.7M |
| CANADA | $90K | $967K | +$877K |
| CHINA | -- | -- | -- |
| UNITED ARAB EMIRATES | -- | -- | -- |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8402110000 | WATERTUBE BOILERS STEAM PRODUCTION EXC 45 T PER HR | $14.8M | 15.20% | $2.2M |
WATERTUBE BOILERS STEAM PRODUCTION EXC 45 T PER HR
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8402110000 | WATERTUBE BOILERS STEAM PRODUCTION EXC 45 T PER HR | $967K |
WATERTUBE BOILERS STEAM PRODUCTION EXC 45 T PER HR
99 t
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $14.7M | $967K | -$13.7M |
| Virginia | $49K | -- | -$49K |
| South Carolina | $41K | -- | -$41K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $14.7M | -- | -$14.7M |
| SWEETGRASS, MT | -- | $967K | +$967K |
| PEMBINA, ND | $49K | -- | -$49K |