Industrial Kiln Ceramic Insulator Tubes

High-temperature alumina tubes insulating heating element wires in electric kilns and furnaces (up to 1700°C). Provides electrical isolation in oxidizing atmospheres. Classified 8546.20.00.90 as other ceramic electrical insulators.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3%+35.0%38%
🇲🇽Mexico3%+10.0%13%
🇨🇦Canada3%+10.0%13%
🇩🇪Germany3%+10.0%13%
🇯🇵Japan3%+10.0%13%

Alternative Classifications

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

6902.10Lower: 10% vs 38%

If as general refractory kiln furniture

Ceramic kiln supports without specific electrical insulation function use refractory heading.

8516.80Lower: 10% vs 38%

If permanently installed in heating resistors

Insulators integral to electric heaters classify as heating element parts.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

Specify maximum use temperature and thermal expansion coefficient for kiln compatibility

Include element wire diameter accommodation and end flare dimensions

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