Synthetic Fused Quartz Process Gas Tubes from United States
Synthetic fused quartz process gas tubes are unworked synthetic fused silica tubes used for delivering process gases in semiconductor and solar cell manufacturing. Flame-polished ends are acceptable if performed before annealing per chapter notes. These tubes are classified under 7002.31.00 as unworked tubes of fused quartz.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the tubes are not subjected to working processes after annealing, such as cutting or bending
• Provide documentation of the manufacturing process, including annealing steps, to prove the unworked status
• If the tubes are part of a gas delivery system, check if they should be classified with the system