7019.62.90.30 - Silica filament fabric of filaments with silica content greater than 93 percent (622)

This HTS category, 7019.62.90.30, specifically classifies woven fabrics made from silica filaments. The defining characteristic is a high silica content, exceeding 93 percent. These fabrics are typically used in specialized applications where extreme heat resistance, chemical inertness, and electrical insulation properties are paramount. Examples include high-temperature insulation for industrial furnaces, aerospace components, and filtration media for aggressive chemical environments.

At this specific level of classification, the "Other" designation for colored silica filament fabric distinguishes it from its sibling, 7019.62.90.60, which would encompass uncolored or naturally colored silica filament fabrics. Therefore, any woven silica filament fabric that has been intentionally colored during its manufacturing process falls under this particular code.

As a leaf node in the HTS structure, there are no further subdivisions for 7019.62.90.30. The classification ends here, meaning that the physical and chemical properties, specifically the high silica content and the fact that it is a colored, mechanically bonded fabric of rovings, are the final determining factors for goods falling into this category.