Calcium Silicate Kiln Insulation Segments
Curved molded segments for lining rotary kilns, providing heat insulation and erosion resistance from pure calcium silicate. Classified in HTS 6806.90.00.20 for specialized expanded mineral insulating articles.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If refractory grade for metallurgical kilns
Chapter 69 covers refractory ceramic goods of silicate exceeding standard insulation specs.
If generic 'other' mineral without calcium silicate spec
Subheading 6806.90.00.20 requires specific molded calcium silicate; others stay broader 6806.90.
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Import Tips & Compliance
• Submit material safety data sheets (MSDS) confirming non-asbestos and low thermal conductivity (<0.06 W/mK)
• For sets of segments, declare as articles not components to avoid parts classifications
Related Products under HTS 6806.90.00.20
Calcium Silicate Boiler Wall Insulation Blocks
Dense molded blocks used to line high-pressure boiler walls, offering superior thermal stability and fire resistance from calcium silicate composition. Falls under HTS 6806.90.00.20 as 'other' heat-insulating articles of molded calcium silicate mineral material.
Calcium Silicate Turbine Housing Insulation
Custom-molded linings for steam turbine housings, designed for extreme heat and vibration resistance using calcium silicate. Fits HTS 6806.90.00.20 as other insulating articles of this specific mineral material.
Molded Calcium Silicate Acoustic Barrier Panels
Panels molded for sound absorption in industrial noise control, with secondary heat insulation from calcium silicate density. HTS 6806.90.00.20 includes sound-insulating mineral articles like these.
High-Temp Calcium Silicate Flue Insulation
Molded cylindrical sections for chimney flues in biomass plants, resisting 1100°F gases via calcium silicate structure. Classified under HTS 6806.90.00.20 for expanded mineral heat insulators.
Molded Calcium Silicate Pipe Insulation
Pre-formed insulation sections designed to fit around industrial pipes, made from molded calcium silicate for high-temperature resistance up to 1200°F. Classified under HTS 6806.90.00.20 as articles of heat-insulating mineral materials specifically composed of molded calcium silicate, excluding those in headings 6811, 6812, or chapter 69.
Molded Calcium Silicate Fireproof Board Panels
Fire-rated panels molded from calcium silicate for use in building partitions and protective enclosures in industrial settings. HTS 6806.90.00.20 covers these as sound/heat-insulating articles, distinct from ceramic or asbestos products.