Cast Iron Ventilation Duct Pipe
Rigid cast iron hollow pipe for industrial ventilation and exhaust systems. Under HTS 7303.00.00.90 as other cast iron pipes, suitable for high-temperature air movement. Resistant to warping under heat.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +37.5% | 37.5% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +12.5% | 12.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If condenser or heat exchanger tubes
Heat transfer-specific tubes have dedicated suffixes.
If integral to industrial fans
Fan parts classification if not standalone pipes.
If galvanized coating applied
Surface treatment may shift to other steel tubes.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Specify ventilation end-use in invoices to differentiate from pressure ducts
• Test for cast iron metallurgy to prevent steel misclassification
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