Preform Collapsing Furnace from Germany
High-temperature furnace that heats MCVD-deposited tubes to collapse internal layers into solid optical fiber preforms under controlled atmosphere. Produces symmetrical core-cladding structure. HTS 8475.21.00.00 for this hot working glass machinery.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Specify collapse temperature profiles (2000°C+) unique to silica glass
• Avoid general glass annealing oven classification (8417)
• Pressure differential system documentation