Silica Filament Woven Fabric for Kiln Insulation
High-purity woven fabric made from silica filaments with over 93% silica content, designed for thermal insulation in industrial kilns and furnaces. It falls under HTS 7019.72.40.30 as a chemically bonded, closed, uncolored silica filament fabric used in high-temperature environments. The fabric's structure provides excellent heat resistance up to 1650°C.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If filaments have silica content of 85% or greater but not exceeding 93%
Lower silica threshold shifts to general fiberglass fabrics in 7019.12, excluding ultra-high purity silica variants.
If sold as mineral wool not meeting glass wool silica specs
Chapter notes relegate non-compliant mineral wools to mineral fiber products in Chapter 68.
If classified as other woven fabrics of glass fibers
Broader woven glass fabric category applies if silica purity not explicitly >93% or if chemically bonded feature absent.
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Import Tips & Compliance
• Verify silica content certification exceeding 93% via lab analysis reports to confirm classification; ensure documentation distinguishes from lower-purity glass fibers
• Watch for misclassification as generic nonwovens under 5603 if not specified as silica filament
Related Products under HTS 7019.72.40.30
High-Purity Silica Fabric for Furnace Curtains
Uncolored, closed-weave silica filament fabric (>93% silica) used for protective curtains in high-temperature furnaces. Classified under HTS 7019.72.40.30 due to its chemically bonded structure and exceptional thermal stability. Ideal for aerospace and metallurgy applications requiring non-combustible barriers.
Silica Textile for Thermal Protection Systems
Woven fabric from silica filaments exceeding 93% silica, engineered for spacecraft re-entry thermal shields and protection systems. HTS 7019.72.40.30 applies to this uncolored, chemically bonded closed fabric due to its high silica purity and heat-resistant properties. Used in demanding aerospace environments.
Industrial Silica Filament Cloth for Expansion Joints
Chemically bonded, uncolored silica filament fabric (>93% SiO2) for high-temperature expansion joints in piping systems. Falls under HTS 7019.72.40.30 as other closed fabrics of ultra-high purity silica filaments. Withstands thermal cycling in petrochemical plants.
Silica-Based Fire Blanket Fabric
High-silica (>93%) filament woven fabric for manufacturing fire blankets in industrial safety applications. HTS 7019.72.40.30 covers this uncolored, chemically bonded closed fabric due to its filament composition and purity. Provides superior fire resistance over standard glass fibers.
Ultra-High Temperature Silica Veil Fabric
Lightweight veil-style closed fabric from >93% silica filaments for composite reinforcement in extreme heat applications. Classified in HTS 7019.72.40.30 as chemically bonded, uncolored silica filament fabric. Used in missile components and turbine engines.
Silica Filament Fabric for Foundry Molds
Chemically bonded closed-weave fabric (>93% silica content) lining foundry molds and ladles for molten metal containment. HTS 7019.72.40.30 designation reflects its uncolored, high-purity filament structure. Essential for steel and aluminum casting operations.