Silicon Nitride Thermowell from Canada
Silicon nitride ceramic thermowell protecting temperature sensors in petrochemical furnaces. HTS 6903.90.00 refractory tubes/sheaths for high-corrosion environments. Advanced nitride ceramics fired per Chapter requirements.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Petrochemical end-use certification; prove >1400°C service temperature
• Avoid Chapter 85 sensor classification by importing separately