Extreme Heat Silica Fabric for Flanges
HTS 7019.72.90.30 covers this colored closed chemically bonded fabric of >93% silica filaments. Cut into gaskets for high-pressure steam flanges in power generation. Maintains seal integrity beyond 1000°C.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If impregnated fabrics
Impregnated/coated variants have separate subheadings.
If finished gasket sets
Completed gasket sets classify as machinery sealing articles.
If millstone/grinding wheel use
Industrial grinding applications move to Chapter 68.
Not sure which classification is right?
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Import Tips & Compliance
• Include ASME flange compatibility specs; declare gasket precursor status; verify no metallic impregnation
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