Corrugated Steel Flexible Chimney Liner

Alloy steel flexible liner tubing installed within masonry chimneys for venting wood/pellet stoves. Falls under HTS 8307.10.60.00 as other flexible steel tubing for high-temperature applications. UL-1777 listed for safety.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.8%+35.0%38.8%
🇲🇽Mexico3.8%+10.0%13.8%
🇨🇦Canada3.8%+10.0%13.8%
🇩🇪Germany3.8%+10.0%13.8%
🇯🇵Japan3.8%+10.0%13.8%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

7304.41.30Lower: 17.5% vs 38.8%

If for seamless stainless boiler tubes

High-pressure seamless tubes for boilers shift to Chapter 73 tubes/pipes.

7321.90.60Lower: 35% vs 38.8%

If when sold with stove appliance fittings

Stove parts including venting are under Chapter 73 metal stove parts.

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Import Tips & Compliance

Provide UL listing and temperature ratings (up to 1800°F) documentation

Declare stainless steel alloy composition for proper duty assessment

Coil diameters must match chimney sizes (6-8 inches typical)

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