Quartz Glass Tubing for Fiber Optics
High-purity fused quartz glass tubes supplied unworked for manufacturing fiber optic cables and components. Classified in HTS 7002.39.00 as unworked tubes, including fused silica per chapter notes, prior to any drawing or fabrication. Ideal for high-temperature and optical applications.
Import Duty Rates by Country of Origin
More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If drawn to precise dimensions for immediate fiber drawing
Drawn tubes ready for fiber production are 'drawn or blown,' shifting from unworked category.
If for non-glass mineral-based tubes
If not qualifying as fused quartz/silica glass per chapter note, falls under other mineral manufactures.
If processed into optical instrument tubes
Tubes further worked for use in optical instruments like endoscopes classify as glass for scientific instruments.
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Import Tips & Compliance
• Include fused silica purity certificates (SiO2 content) to confirm classification under glass definitions in Chapter 70
• Avoid common error of importing with protective coatings, which could classify as 'worked' under 7002.39 with absorbent layers
• Document end-use as industrial raw material to prevent misclassification as finished optical fiber under 9001
Related Products under HTS 7002.39.00
Borosilicate Capillary Glass Tubes
Precision unworked borosilicate glass tubes with very small inner diameters for medical and analytical capillary applications. Falls under HTS 7002.39.00 as other unworked tubes, before any sealing or calibration. Used in blood analyzers, chromatography, and micro-fluidics.
Pyrex Glass Tubing for Industrial Thermowells
Pyrex-brand borosilicate unworked glass tubes for fabricating protective thermowells in industrial sensors. HTS 7002.39.00 for other unworked tubes, resistant to thermal shock for harsh environments. Used in chemical plants and refineries.
High-Purity Silica Glass Tubes for UV Lamps
Unworked high-purity synthetic silica glass tubes transmitting UV light for germicidal lamps and curing systems. HTS 7002.39.00 covers these fused silica tubes before quartz working. Essential for water purification and sterilization equipment.
Square Borosilicate Glass Tubing
Unworked square-profile borosilicate glass tubes for architectural models and specialty furniture. Classified HTS 7002.39.00 as other unworked tube shapes beyond round. Provides structural glass elements without fabrication.
Thin-Wall Borosilicate Glass Tubing for Vaporizers
Ultra-thin wall unworked borosilicate tubes for high-end electronic cigarette tanks and vaporizer chambers. HTS 7002.39.00 for other precision tubes before tank assembly. Heat-resistant for vaping applications.
Fused Quartz Rod-Tubes for Laboratory Furnaces
Hybrid rod-tube fused quartz glass unworked structures for custom lab furnace construction. HTS 7002.39.00 encompasses these complex unworked forms including fused silica. Extreme thermal properties for research heating.