6806.90.00.20/High-Temp Calcium Silicate Flue Insulation/Japan

High-Temp Calcium Silicate Flue Insulation from Japan

Molded cylindrical sections for chimney flues in biomass plants, resisting 1100°F gases via calcium silicate structure. Classified under HTS 6806.90.00.20 for expanded mineral heat insulators.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Certify low chloride content (<50ppm) for corrosion compliance in flue apps

• Declare as pre-molded to prevent bulk mixture duties