Preform Collapsing Furnace from United States
A high-temperature furnace that heats MCVD-deposited tubes to collapse internal layers into solid optical fiber preforms under a controlled atmosphere. It produces a symmetrical core-cladding structure. This furnace is used for making optical fibre preforms, thus classified under tariff item 8475.21.00.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the furnace is designed for optical fibre preform collapsing, not general glass melting
• Provide temperature control specifications to CBSA
• Check if the furnace requires any special permits for high-temperature operation