Of fused quartz or other fused silica
Glass in balls (other than microspheres of heading 70.18), rods or tubes, unworked. > Tubes: > Of fused quartz or other fused silica > Of fused quartz or other fused silica
Duty Rate (from China)
Products classified under Tariff item 7002.31.00
Fused Quartz Optical Fiber Drawing Tubes
Fused quartz optical fiber drawing tubes are precision unworked tubes made of fused silica, used in the production of optical fibers. Their high clarity and low impurity levels are essential for maintaining signal integrity during fiber drawing. They fall under tariff item 7002.31.00 as unworked tubes of fused quartz or other fused silica.
Fused Quartz Semiconductor Processing Tubes
Fused quartz semiconductor processing tubes are long, unworked tubes used in diffusion furnaces and CVD reactors. Their extreme purity prevents contamination during high-temperature wafer processing. These tubes are classified under 7002.31.00 as unworked tubes of fused quartz.
Fused Quartz Solar Simulator Tubes
Fused quartz solar simulator tubes are unworked fused silica tubes used as test chambers for photovoltaic cell evaluation. They maintain high solar transmission down to 200nm due to their purity. These tubes fall under 7002.31.00 as unworked tubes of fused quartz.
Fused Quartz Tubing for Laboratory Reactors
Fused quartz tubing for laboratory reactors consists of unworked tubes made from fused quartz or fused silica, supplied in straight lengths without further processing. These tubes are essential components in laboratory equipment such as reactors. They are classified under 7002.31.00 as unworked tubes of fused quartz.
Fused Silica Capillary Tubes
Fused silica capillary tubes are thin-walled, unworked tubes used in gas chromatography and analytical instruments. They maintain optical clarity and purity essential for precise measurements. These tubes fall under 7002.31.00 as unworked tubes of fused quartz.
Fused Silica Investment Casting Shell Tubes
Fused silica investment casting shell tubes are unworked fused quartz tubes used as drain and vent lines in ceramic shell investment casting molds. Their high-temperature stability prevents shell cracking during casting. These tubes are classified under 7002.31.00 as unworked tubes of fused quartz.
Fused Silica Lamp Tubing
Fused silica lamp tubing is unworked tubing of synthetic fused quartz used for high-intensity discharge lamps and UV lamps. It provides an envelope material that transmits UV while containing high pressures. These tubes fall under 7002.31.00 as unworked tubes of fused quartz.
Fused Silica Pharmaceutical Drying Tubes
Fused silica pharmaceutical drying tubes are unworked tubes of fused quartz used in freeze-drying equipment for pharmaceutical lyophilization. Their inertness prevents product-glass interactions during sublimation. These tubes are classified under 7002.31.00 as unworked tubes of fused quartz.
Fused Silica Thermocouple Protection Tubes
Fused silica thermocouple protection tubes are unworked protective tubes for thermocouples in high-temperature environments. Made from pure fused quartz, they withstand molten glass contact without devitrification. These tubes fall under 7002.31.00 as unworked tubes of fused quartz.
Synthetic Fused Quartz Process Gas Tubes
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.