Seamless Ventilation Duct Tube 15.5-inch
Large seamless steel tube for industrial HVAC ducts, 393.7 mm OD, 9 mm wall, galvanized interior. Classed in 7304.39.0062 for nonalloy seamless circular profile, OD specs met, thin wall. High-volume air handling in factories.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded galvanized duct pipe
Welded galvanized steel pipes for ducts classify in 7306.30.
If prefabricated into duct assemblies
Assembled with elbows/dampers as structures, shifts to 7308 steelwork.
If as industrial fan parts
Tube sections designed for specific fans may be air pump parts under 8414.
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Import Tips & Compliance
• Galvanizing doesn't change classification—declare base tube material and coating separately
• Ensure no spiral welding; true seamless required for 7304
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