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HSChapter 84
U.S. exports of high-capacity watertube boilers (over 45 tonnes/hour steam output) (HS 840211) totaled $3.4M in July 2026.
Importers of High-Capacity Watertube Boilers (Over 45 Tonnes/Hour Steam Output) paid $129K in duties in July 2026 — an effective duty rate of 5.2% on $2.5M 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 $2.5M in July 2026 ran 38% below the year-to-date monthly average of $4.0M.
Last updated: July 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.
3 shipments/mo
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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Subheading 2 of 5 in heading 8402
Subheading 840211 · $2.5M of $89.1M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8402110000 | Watertube Boilers Steam Production Exc 45 T Per Hr | $2.5M | 5.17% | 99.50% | $129K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8402110000 | Watertube Boilers Steam Production Exc 45 T Per Hr | $3.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$2.5MYoY · Pro
Exports
$3.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and Philippines together take 100% of it.
customs district
origin
entry
rate provision · imports
0.5% enters free of duty; the effective duty rate is 5.17%.