Dyed Silica Filament Expansion Joint Fabric
A colored, chemically bonded closed fabric of high-purity silica filaments (>93% SiO2), classified in HTS 7019.72.90.30. Used in expansion joints for pipes and ducts in power plants, it accommodates thermal movement while maintaining insulation. Its high silica content ensures long-term stability at elevated temperatures.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not statistically specified as 622 type
Other colored silica fabrics without >93% spec fall under broader 'other' suffixes.
If combined with plastic profiles
Plastic tubes with glass fiber reinforcement classify in Chapter 39 plastics.
If when assembled into pipe fittings
Assembly into metal pipe systems shifts classification to iron/steel articles.
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Import Tips & Compliance
• Document compliance with ASTM standards for high-silica textiles; declare as 'silica filament' specifically; monitor for country-specific safeguard measures
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