Preform Collapsing Furnace from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 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