Cast Iron Chimney Flue Pipe
Cylindrical hollow cast iron pipe for venting smoke and gases from fireplaces or boilers. Under HTS 7303.00.00.90 as other cast iron pipes, not specialized for pressure or drilling. Its thick walls ensure heat resistance and longevity.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If boiler or superheater tubes
Specific boiler-use cast iron tubes have separate reporting.
If machined for stove components
Appliance-specific cast iron parts fall under stoves/ovens heading.
If threaded for flange connection
Threaded flange-type pipes are fittings, not basic hollow profiles.
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
• Include fire safety certifications to support non-pressurized flue classification
• Document inner diameter specs to differentiate from boiler tubes
Related Products under HTS 7303.00.00.90
Cast Iron Decorative Hollow Column
Hollow cast iron column pipe for architectural support and decoration in gazebos. Fits HTS 7303.00.00.90 as other hollow profiles of cast iron. Balances load-bearing with ornate detailing.
Cast Iron Irrigation Hollow Pipe
Durable hollow cast iron pipe for permanent irrigation channels in agriculture. HTS 7303.00.00.90 for other cast iron pipes in non-pressurized water distribution. Long-lasting in corrosive soils.
Cast Iron Lamp Post Pipe
Tall hollow cast iron pipe forming the shaft of street or garden lamp posts. Under HTS 7303.00.00.90 as other cast iron hollow profiles for lighting supports. Often textured for period authenticity.
Cast Iron Bridge Drain Pipe
Hollow profile cast iron pipe embedded in bridge decks for runoff drainage. HTS 7303.00.00.90 covers these robust infrastructure pipes. Designed for vibration and weather resistance.
Cast Iron Exhaust Stack Pipe
Tall hollow cast iron pipe serving as exhaust stacks for industrial furnaces. Under HTS 7303.00.00.90 as other cast iron pipes for high-temperature emissions. Corrosion-resistant interior lining.
Cast Iron Drainage Pipe
A hollow profile pipe made of cast iron, typically used in underground drainage systems for wastewater. It falls under HTS 7303.00.00.90 as it is a cast iron tube, pipe, or hollow profile not specified elsewhere in the heading. These pipes are valued for their durability and corrosion resistance in non-pressurized applications.