High-Silica Glass Yarn
High-silica (>80% SiO2) yarn for thermal protection in aerospace and furnace applications. Classifies under HTS 7019.13.35.00 as 'other' glass fiber yarn. Leached composition provides extreme heat resistance.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If qualifying as glass wool
Meets Chapter 7019 note (a) for silica >60% wool classification.
If formed into refractory shapes
Refractory glass ceramic articles go to Chapter 69.
If slag wool
Slag-based mineral wools excluded from glass fiber headings.
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Import Tips & Compliance
• Submit silica content analysis (ASTM C169) to distinguish from standard compositions
• Handle as hazardous material if fiber length <6 microns for respiratory protection
• Mark 'not for apparel/textile use' to prevent Chapter 62 misrouting
Related Products under HTS 7019.13.35.00
E-Glass Continuous Filament Yarn
E-glass yarn made from continuous filaments, used primarily in composite reinforcement for fiberglass products like boat hulls and automotive parts. Classified under HTS 7019.13.35.00 as 'other' yarn, slivers from glass fibers excluding glass wool. It meets Chapter 70 specifications for glass fibers processed into yarn form.
S-Glass Roving Yarn
High-strength S-glass roving yarn for aerospace composites and military applications, featuring low dielectric properties. Falls under HTS 7019.13.35.00 as 'other' glass fiber yarn or slivers. Distinguished from basic E-glass by superior tensile strength.
AR-Glass Yarn for Concrete Reinforcement
Alkali-resistant AR-glass yarn used in cement boards and GRC (glass fiber reinforced concrete) panels. HTS 7019.13.35.00 covers this 'other' glass fiber yarn designed for construction composites. Its zirconia content provides corrosion resistance in alkaline environments.
C-Glass Electrical Insulation Yarn
Corrosion-resistant C-glass yarn for electrical insulation in transformers and motors. Classified as 'other' yarn under HTS 7019.13.35.00 due to its borosilicate composition. Provides dielectric strength superior to E-glass.
Textile-Grade E-Glass Assembled Yarn
Multi-strand assembled E-glass yarn for woven industrial fabrics like filter cloths. HTS 7019.13.35.00 as 'other' slivers/yarn from continuous glass filaments. Features plied construction for weaving stability.
Direct Roving for Pultrusion
Untwisted direct roving E-glass yarn for pultrusion processes creating structural profiles. Under HTS 7019.13.35.00 as 'other' glass fiber roving/yarn. High strand count for resin impregnation in continuous molding.