Fused Silica Pharmaceutical Drying Tubes
Unworked tubes of fused quartz used in freeze-drying equipment for pharmaceutical lyophilization processes. Inertness prevents product-glass interactions during sublimation. Classified under 7002.31.00.00 as unworked fused silica tubes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fabricated into lyophilizer shelves/trays
Pharmaceutical processing vessels become laboratory glassware.
If crucible-grade fused silica for lab furnaces
Lab furnace crucibles classify as ceramic labware.
If as complete freeze-drying apparatus parts
Lyophilizer machinery components fall under lab equipment.
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Import Tips & Compliance
• USP Class VI biocompatibility certificates often required alongside material specs
• Document cleanroom production to prove pharmaceutical grade purity
Related Products under HTS 7002.31.00.00
Fused Quartz Semiconductor Processing Tubes
Long, unworked tubes of fused quartz used in semiconductor diffusion furnaces and CVD reactors. Their extreme purity prevents contamination during wafer processing at high temperatures. Falls under 7002.31.00.00 for unworked fused silica tubes.
Fused Quartz Optical Fiber Drawing Tubes
Precision unworked tubes of fused silica used in optical fiber preform collapse and drawing towers. Their clarity and low impurity levels are critical for single-mode fiber production. HTS 7002.31.00.00 applies to these unworked fused quartz tubes.
Fused Quartz Solar Simulator Tubes
Unworked fused silica tubes serving as test chambers for photovoltaic cell evaluation under concentrated solar simulation. High solar transmission (down to 200nm) maintained through purity. HTS 7002.31.00.00 for unworked tubes of fused quartz.
Synthetic Fused Quartz Process Gas Tubes
Unworked synthetic fused silica tubes for delivering process gases in semiconductor and solar cell manufacturing. Flame-polished ends acceptable if pre-annealing per chapter notes. HTS 7002.31.00.00 covers these unworked tubes.
Fused Quartz Tubing for Laboratory Reactors
Unworked tubes made from fused quartz or fused silica, supplied in straight lengths without further processing beyond forming and annealing. These tubes are essential components in laboratory equipment like reactors and distillation apparatus due to their high thermal resistance and chemical inertness. Classified under HTS 7002.31.00.00 as unworked tubes of fused quartz or other fused silica.
Fused Silica Capillary Tubes
Thin-walled, unworked capillary tubes of fused silica used primarily in gas chromatography and analytical instruments. These tubes maintain optical clarity and purity essential for precise measurements. HTS 7002.31.00.00 covers them as unworked tubes of fused quartz or other fused silica.