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HSChapter 73
U.S. exports of large-capacity iron & steel tanks, reservoirs & vats (over 300 liters) (HS 730900) totaled $37.2M in July 2026.
Importers of Large-Capacity Iron & Steel Tanks, Reservoirs & Vats (Over 300 Liters) paid $8.4M in duties in July 2026 — an effective duty rate of 32% on $25.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 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.
1.0K shipments/mo
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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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 |
|---|---|---|---|---|---|
| 7309000030 | Tanks, Ios Cap Ov 300l Nt Ins Nt Mch Thrml Nf Gas | $15.4M | 31.78% | 79.00% | $4.9M |
| 7309000090 | Resvrs Vts A SIM Cntnrs Ios Cap Ov 300l Nf Gases | $14.1M | 24.76% | 97.77% | $3.5M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7309000090 | Resvrs Vts A SIM Cntnrs Ios Cap Ov 300l Nf Gases | $23.4M |
| 7309000030 | Tanks, Ios Cap Ov 300l Nt Ins Nt Mch Thrml Nf Gas | $13.8M |
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.
Subheading 1 of 1 in heading 7309
Subheading 730900 · $29.4M of $29.4M
ImportsExports
Imports
$29.4MYoY · Pro
Exports
$37.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Mexico and Canada together take 54% of it.
customs district
origin
entry
rate provision · imports
11.9% enters free of duty; the effective duty rate is 28.42%.