Other

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.

Borosilicate Condensate Trap Tubes

Unworked borosilicate glass tubes designed for cold traps in vacuum distillation systems. Their low linear coefficient of expansion (≤5 x 10⁻⁶/K from 0°C to 300°C) ensures resistance to thermal shock during repeated cycling. These tubes are classified under tariff item 7002.32.00 as unworked glass tubes of low-expansion glass.

Borosilicate Glass Capillary Tubes

Thin-walled, unworked borosilicate capillary tubes with a low expansion coefficient, used in chromatography, medical diagnostics, and precision instrumentation. They meet the tariff item's requirement of a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K within 0°C to 300°C. These tubes are imported in their raw state before any drawing or processing.

Borosilicate Glass Laboratory Tubing

Unworked borosilicate glass tubing with a low linear coefficient of expansion (≤5 x 10⁻⁶/K from 0-300°C), used for fabricating laboratory equipment like test tubes and reaction vessels. The tubing is imported in long lengths without any working or finishing processes. It falls under tariff item 7002.32.00 as unworked tubes of low-expansion glass.

Borosilicate Glass Tubes for Fiber Optic Preforms

Unworked low-expansion glass tubes used as overcladding in fiber optic preform manufacturing for telecommunications cables. These borosilicate tubes have a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K within 0°C to 300°C. They are imported in their raw tube form without any working or processing.

Glass Tubes for High-Temperature Manometers

Borosilicate tubing with low thermal expansion for precision pressure gauges operating at elevated temperatures. These unworked tubes are designed for high-temperature manometers and meet the tariff item's coefficient of expansion requirement. They are imported in raw tube form without any working.

Low-Expansion Glass Rods for Laser Housings

Solid borosilicate rods for thermal mounts in high-power laser systems where dimensional stability is critical. These unworked rods have a low linear coefficient of expansion (≤5 x 10⁻⁶/K) and are imported in their raw state. They fall under tariff item 7002.32.00 as unworked rods of low-expansion glass.

Low-Expansion Glass Rods for Optical Seals

Unworked borosilicate rods designed for hermetic sealing with optical fibers and metal in photonics devices. These rods have a low coefficient of expansion (≤5 x 10⁻⁶/K) and are imported in raw form. They are classified under tariff item 7002.32.00 as unworked rods of low-expansion glass.

Low-Expansion Glass Tubes for Vacuum Systems

Unworked glass tubes of low thermal expansion borosilicate for high-vacuum applications like vacuum manifolds and seals in scientific equipment. These tubes meet the tariff item's requirement of a linear coefficient of expansion not exceeding 5 x 10⁻⁶/K. They are imported in raw tube form without any working.

Pyrex-Type Borosilicate Glass Rods

Unworked solid glass rods made from borosilicate with controlled low thermal expansion (≤5 x 10⁻⁶/K), ideal for stirring rods, thermometer tubes, and scientific instrument components. These rods are imported in their raw state without any working or finishing. They fall under tariff item 7002.32.00 as unworked rods of low-expansion glass.

Thermometer Glass Tubing

Specialty unworked borosilicate tubing with precise bore and low thermal expansion for manufacturing mercury-free thermometers and temperature probes. These tubes meet the tariff item's coefficient of expansion requirement and are imported in raw tube form. They are classified under tariff item 7002.32.00 as unworked tubes of low-expansion glass.

Aquarium Air Pump Tubing Glass

Thin-wall soda glass tubing, 5mm outer diameter, for aquarium air pump silencers and diffusers, unworked. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, as they have not been processed beyond drawing.

Borosilicate Capillary Glass Tubes

Borosilicate capillary glass tubes with very small inner diameters, unworked and supplied for medical and analytical applications. They are classified under this tariff item as other unworked glass tubes, before any sealing, calibration, or further processing.

Borosilicate Capillary Tubes 50mm

Precision borosilicate glass capillary tubes, 50mm in length, unworked and intended for medical and scientific applications such as blood sampling. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, as they have not undergone any processing beyond drawing.

Borosilicate Glass Test Tubes

Borosilicate glass test tubes, unworked and used in laboratory settings for experiments and sample containment. They are classified under this tariff item as other unworked glass tubes, without any drawn, blown, or further processed features.

Borosilicate Glass Test Tubes 100mm

Unworked borosilicate glass test tubes, 100mm in length, used in laboratory settings for chemical experiments and sample containment. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, as they have not been processed beyond the initial drawing stage.

Borosilicate Glass Tubing 10mm OD

Unworked borosilicate glass tubing with 10mm outer diameter, supplied in straight lengths without any drawing, cutting to final shape, or annealing post-processing. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes.

Borosilicate Round Glass Tubing 10mm OD

Standard 10mm outer diameter borosilicate unworked glass tubing, stocked for general fabrication. It is classified under this tariff item as other unworked glass tubes, suitable for prototyping, aquariums, and custom glasswork.

Bulk Glass Tubing for Recycling

Unworked soda-lime glass tubing returns, 10-20mm OD range, for cullet recycling. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, despite prior use, as they are clean and sorted.

Colored Soda Glass Tubing 8mm OD

Translucent colored soda-lime unworked glass tubing with an 8mm outer diameter, for artistic glassworking and decorative lighting. The color is integral to the melt, not a coating, and the tubes are classified under this tariff item as other unworked glass tubes.

Custom Wall Thickness Glass Tubing

Soda-lime glass tubing with specified 1.2mm wall thickness, unworked 22mm OD for OEM production. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, as custom specifications do not constitute working.

Decorative Glass Lampworking Tubing

Colored soda-lime glass tubing in assorted diameters for glassblowing and lampworking art, unworked condition. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with pigments added during the melt.

Fused Quartz Rod-Tubes for Laboratory Furnaces

Hybrid rod-tube fused quartz glass unworked structures for custom lab furnace construction. They are classified under this tariff item as other unworked glass tubes, including fused silica per chapter note 5, and are used for extreme thermal properties in research heating.

Fused Silica Glass Tubes for Semiconductor Processing

Unworked fused silica tubes designed for high-purity environments in semiconductor diffusion furnaces and wafer processing. They are classified under this tariff item as other unworked glass tubes, leveraging the chapter definition of fused silica as glass.

Fused Silica Tubes 120mm Semiconductor Grade

High-purity fused silica glass tubes, 120mm in length, unworked, for semiconductor diffusion and wafer processing equipment. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with fused silica included in the definition of glass per Chapter Note 5.

Heavy Wall Borosilicate Glass Pressure Tubes

Thick-walled unworked borosilicate glass tubes rated for high internal pressure in hydraulic sight glasses. They are classified under this tariff item as other unworked glass tubes for robust industrial applications, monitoring fluid levels in machinery.

High-Purity Silica Glass Tubes for UV Lamps

Unworked high-purity synthetic silica glass tubes transmitting UV light for germicidal lamps and curing systems. They are classified under this tariff item as other unworked glass tubes, including fused silica, before any quartz working.

Industrial Thermometer Glass Tubing

Borosilicate capillary tubing with precise bore for industrial thermometers, unworked 4mm OD. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with the bore formed during the drawing process.

Neutral Glass Tubing 90mm Pharmaceutical

Type I neutral borosilicate glass tubes, 90mm in length, unworked, used as raw material for pharmaceutical ampoules and vials. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, as they have not been expanded or fire-polished.

Neutral Glass Tubing for Ampoules 12mm OD

Type I neutral borosilicate glass tubing, 12mm outer diameter, unworked, specifically for pharmaceutical ampoule production. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with hydrolytic resistance meeting pharmacopeia standards.

Neutral Glass Tubing for Pharmaceutical Vials

Type I neutral borosilicate glass tubing in unworked form for conversion into injectable vials and ampoules. It is classified under this tariff item as other unworked glass tubes, supplied in bulk coils or straights for pharmaceutical packaging lines.

Optical Fiber Preform Glass Tube

Specialty low-OH fused silica tubing for optical fiber preform overcladding, unworked 25mm OD. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with fused silica included in the definition of glass per Chapter Note 5.

Pharma-Grade Tubing for Syringe Barrels

USP Type I borosilicate glass tubing for hypodermic syringe barrel production, supplied unworked in 14mm OD. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with no forming or fire-polishing performed.

Precision Borosilicate Glass Tubing 16mm OD

High-precision borosilicate glass tubing with a 16mm outer diameter and tight wall thickness tolerance. The tubing is unworked, having undergone only annealing, and is used in scientific applications such as custom glassware fabrication.

Pyrex Brand Lab Tubing 18mm OD

Trademarked Pyrex borosilicate glass tubing with an 18mm outer diameter, delivered unworked for laboratory use. The brand name does not affect classification, as the material and unworked state determine the tariff item.

Pyrex Glass Tubing for Industrial Thermowells

Pyrex-brand borosilicate unworked glass tubes for fabricating protective thermowells in industrial sensors. They are classified under this tariff item as other unworked glass tubes, resistant to thermal shock for harsh environments in chemical plants.

Quartz Glass Tubes 150mm for Optical Use

Fused quartz glass tubes, 150mm long, unworked, intended for fabrication into optical components such as lenses or fiber drawing. These tubes are classified under tariff item 7002.39.00 as other unworked glass tubes, with fused quartz included in the definition of glass per Chapter Note 5.

Quartz Glass Tubing for Fiber Optics

High-purity fused quartz glass tubes supplied unworked for manufacturing fiber optic cables and components. They are classified under this tariff item as other unworked glass tubes, including fused silica per chapter note 5, prior to any drawing or processing.