HS Code for Steel Storage Tanks
The HS Code for steel storage tanks is 730900. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 730900 |
|---|---|
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 0% |
| Chapter | 73 |
| Heading | 7309 |
| Last Updated | 2026-05 |
Description
Reservoirs, tanks, vats of iron or steel, capacity > 300 litres
Steel storage tanks and vats exceeding 300 liters in capacity are duty-free under this HTS code.
Frequently Asked Questions
What are the major cost factors beyond the product price for importing steel storage tanks under HTS 730900?
Beyond the product price, key costs for steel storage tanks over 300L include significant ocean freight charges due to their size and weight, which often requires specialized flat rack or open top containers. You will also face substantial harbor maintenance fees and potential heavy lift surcharges at both origin and destination ports for handling these bulky items.
What specific compliance documentation is required for importing steel storage tanks (HTS 730900) holding over 300 liters into the United States?
For tanks designed to hold liquids or gases under pressure, importers must provide an ASME (American Society of Mechanical Engineers) Boiler and Pressure Vessel Code certification. Additionally, tanks intended for potable water or food-grade applications require a manufacturer's affidavit of compliance with FDA or NSF/ANSI 61 standards. These documents must be submitted with the customs entry.
What are the key shipping and packaging requirements for steel storage tanks under HTS 7309.00?
Steel tanks over 300 liters capacity must be securely mounted on a flat rack or in a flatbed container and blocked and braced to prevent shifting during transit. The large size and heavy weight often require open-top or platform container shipping, and internal components must be protected from moisture and damage with appropriate dunnage and waterproof coverings.
Seasonal Import Trends for Steel Storage Tanks
Imports of steel storage tanks under HTS 7309.00.00 show a consistent seasonal pattern, with peak volumes typically arriving in Q2 and Q3. This aligns with the pre-winter demand for heating oil tanks and the construction season for agricultural and industrial water storage. Data from U.S. Customs shows import volumes can be 20-30% higher in these quarters compared to Q1 and Q4. Shippers should plan for potential congestion at ports like Houston and Los Angeles during these peak summer and early fall months.
Steel Tank Compliance: Standards & Markings
Tanks for pressure applications must comply with the ASME Boiler and Pressure Vessel Code, and imports into the U.S. typically require the ASME "U" stamp certification. For non-pressure storage tanks (e.g., for water, oil, or chemicals), compliance with standards like AWWA D100 for water storage or API 650 for petroleum is critical. All tanks should be clearly marked with the manufacturer's name, capacity, design standard, and maximum working pressure. Failure to provide proper certification can result in Customs holds (CF 28 or CF 29) and rejection at the port of entry.
Related HS Codes
Ready to source Steel Storage Tanks?
Compare prices from verified manufacturers on Alibaba.
View Verified SuppliersAffiliate link — we may earn a commission at no extra cost to you.
Related Tools
Get tariff change alerts
We'll email you when duty rates change for products you care about. No spam.