Ceramic Retort Tube from United States
Fired mullite ceramic retort tube for gas purification processes at elevated temperatures in industrial chemical applications. This is shaped from mullite and fired above 800°C, making it a fired refractory ceramic good. Retort tubes are explicitly named in heading 69.03, and the non-clay composition places it under this tariff item.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the retort tube is fired above 800°C, as unfired or low-temperature articles are excluded from Chapter 69
• Keep documentation of the mullite composition and firing process to support the classification
• No import permit is required for these refractory goods