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HSChapter 84
U.S. imports of mechanical stokers, grates, ash dischargers & similar appliances (HS 841630) totaled $122K in April 2026, traded with 6 countries.
Importers of Mechanical Stokers, Grates, Ash Dischargers & Similar Appliances paid $12K in duties in April 2026 — an effective duty rate of 10% on $122K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataMechanical stokers, traveling grates, and ash discharge systems are core components of solid-fuel combustion installations — biomass boilers, coal-fired industrial furnaces, and waste-to-energy plants among them. All imports enter under a single tariff line (8416300000), so classification disputes typically arise at the boundary with furnace parts (heading 841690) or with conveying machinery (chapter 84 elsewhere). India leads US supply under this heading, followed by China and Canada. Buyers should document the equipment's functional role within the combustion system to defend classification, particularly for integrated stoker-grate assemblies that could be argued as parts rather than complete appliances.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
If the assembly is presented as a functional unit capable of performing the stoking and grate functions independently, it is generally classified as a complete appliance under 8416300000. Disassembled or incomplete units may be classified as parts under 841690. CBP's essential character analysis and GRI 2(a) apply; a binding ruling is advisable for complex assemblies.
Primary demand comes from biomass and waste-to-energy power plants, industrial coal-fired boilers, and cement or lime kilns that use solid fuel combustion. Retrofit projects at aging industrial facilities also generate import activity, particularly for replacement grate sections and ash handling components.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| FINLAND | $96K | -- | -$96K |
| TAIWAN | $22K | -- | -$22K |
| COSTA RICA | -- | $12K | +$12K |
| MEXICO | -- | $9K | +$9K |
| INDIA | $5K | -- | -$5K |
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8416300000 | MECH STOKES,MECH GRATES, MECH ASH DISCHARGE&SIM AP | $122K | 10.00% | $12K |
MECH STOKES,MECH GRATES, MECH ASH DISCHARGE&SIM AP
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8416300000 | MECH STOKES,MECH GRATES, MECH ASH DISCHARGE&SIM AP | $21K |
MECH STOKES,MECH GRATES, MECH ASH DISCHARGE&SIM AP
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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 |
|---|---|---|---|
| Ohio | $96K | -- | -$96K |
| California | $22K | -- | -$22K |
| Michigan | -- | $12K | +$12K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | $96K | -- | -$96K |
| ANCHORAGE, AK | $22K | -- | -$22K |
| PORT EVERGLADES, FL | -- | $12K | +$12K |