Silicon Nitride Thermowell from China
A silicon nitride ceramic thermowell protecting temperature sensors in petrochemical furnaces. This refractory ceramic good is fired after shaping and falls under tariff item 6903.90.00 as an 'other' refractory article. Its advanced nitride ceramic construction is designed for high-corrosion environments.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the thermowell is fired above 800°C to meet Chapter 69 requirements; provide technical specifications to the CBSA
• Classify under 6903.90.00 as a refractory ceramic good and verify it is not an electrical insulator, which falls under heading 8546
• Keep records of the firing temperature for customs verification