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HSChapter 73
U.S. imports of large-capacity iron & steel tanks, reservoirs & vats (over 300 liters) (HS 730900) totaled $26.7M in April 2026, traded with 41 countries.
Importers of Large-Capacity Iron & Steel Tanks, Reservoirs & Vats (Over 300 Liters) paid $10.5M in duties in April 2026 — an effective duty rate of 42% on $24.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Large-Capacity Iron & Steel Tanks, Reservoirs & Vats (Over 300 Liters) imports of $26.7M in April 2026 ran 11% below the year-to-date monthly average of $30.2M.
Last updated: April 2026 dataReservoirs, tanks, casks, and vats of iron or steel with a capacity exceeding 300 liters (approximately 79 US gallons) serve bulk liquid storage in agriculture, food processing, water treatment, and industrial chemical applications. The heading excludes containers for compressed or liquefied gases, and the two 10-digit lines distinguish between uninsulated, non-mechanically equipped tanks not for gas service (7309000030) and a broader residual category (7309000090). Mexico and Canada are the leading US suppliers, with Taiwan and South Korea also significant sources. Section 232 tariffs apply to these steel articles, and importers should verify whether a tank's insulation, mechanical fittings, or intended contents affect classification under this heading versus related headings covering pressure vessels or refrigerated containers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Heading 7309 covers tanks that are not fitted with mechanical or thermal equipment. A tank with integral heating coils, agitators, or insulation designed for temperature control may be reclassified under a different heading — such as 8419 for industrial process equipment — depending on the nature and purpose of the fittings. Importers should review the complete technical specification before filing entry.
Yes. The heading explicitly excludes containers for compressed or liquefied gases, which are classified under heading 7311. The intended contents and design pressure rating of the vessel are therefore key classification factors, and importers should obtain engineering documentation confirming whether the tank is designed for atmospheric or pressurized service.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $5.2M | $8.0M | +$2.8M |
| CANADA | $7.6M | $5.3M | -$2.4M |
| KOREA, SOUTH | $3.9M | $23K | -$3.9M |
| TAIWAN | $3.5M | -- | -$3.5M |
| UNITED KINGDOM | $1.1M | $1.8M | +$742K |
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 |
|---|---|---|---|---|
| 7309000030 | TANKS, IOS CAP OV 300L NT INS NT MCH THRML NF GAS | $19.7M | 43.35% | $7.9M |
| 7309000090 | RESVRS VTS A SIM CNTNRS IOS CAP OV 300L NF GASES | $7.0M | 38.98% | $2.5M |
TANKS, IOS CAP OV 300L NT INS NT MCH THRML NF GAS
RESVRS VTS A SIM CNTNRS IOS CAP OV 300L NF GASES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7309000030 | TANKS, IOS CAP OV 300L NT INS NT MCH THRML NF GAS | $17.7M |
| 7309000090 | RESVRS VTS A SIM CNTNRS IOS CAP OV 300L NF GASES | $9.3M |
TANKS, IOS CAP OV 300L NT INS NT MCH THRML NF GAS
51.8K no
RESVRS VTS A SIM CNTNRS IOS CAP OV 300L NF GASES
130.4K no
ARTICLES OF IRON OR STEEL NESOI
HS 732690
STRUCTURES AND PARTS NESOI OF IRON OR STEEL
HS 730890
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL
HS 731815
COOKING APPLIANCES ETC FOR GAS FUEL, IRON OR STEEL
HS 732111
NUTS OF IRON OR STEEL
HS 731816
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $5.4M | $6.3M | +$903K |
| New Jersey | $563K | $3.4M | +$2.8M |
| Illinois | $1.4M | $2.2M | +$761K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| OAKLAND, CA | $2.6M | $1.7M | -$913K |
| LAREDO, TX | $1.2M | $3.0M | +$1.8M |
| HOUSTON, TX | $1.7M | $2.1M | +$313K |