Fired Clay Chimney Liners
Cylindrical fired clay sections used to line interior chimney flues for heat and corrosion resistance in residential construction. HTS 6905.90.0050 covers these as other ceramic constructional goods. Distinguished from building bricks in 6904 by specific chimney application.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If refractory for high-heat industrial chimneys
Refractory bricks and shapes for extreme temperatures classify under 6902, not general construction.
If building bricks not specific to chimneys
General clay building bricks fall under 6904, while specialized liners are 'other' constructional.
If containing graphite or carbon binders
Carbon-based ceramic articles excluded or classified under Chapter 68 non-ceramic goods.
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Import Tips & Compliance
• Include flue dimension specs and firing certificates to prove constructional use
• Test for water absorption under 3% if stoneware-like
• Pitfall: importing with mortar as a set may trigger parts classification
Related Products under HTS 6905.90.00.50
Clay Barrel Roof Tiles
Curved, interlocking clay tiles fired after shaping, used for traditional Mediterranean-style roofing to provide weather resistance and aesthetic appeal. Classified under HTS 6905.90.0050 as other ceramic roofing tiles, distinct from chimney pots or architectural ornaments. Meets Chapter 69 requirements for fired ceramic constructional goods.
Terracotta Spanish Roof Tiles
Low-profile, S-shaped terracotta tiles fired from clay for durable, red-hued roofing in Spanish colonial architecture. Falls under HTS 6905.90.0050 as other ceramic roofing tiles for constructional purposes. Excludes non-fired or resin-cured products per Chapter notes.
Ceramic Chimney Cowls
Fired ceramic caps designed to fit over chimneys, preventing downdrafts and protecting against rain while allowing smoke escape. Classified in HTS 6905.90.0050 as other ceramic constructional goods beyond basic tiles or pots. Ensures compliance with firing after shaping per Chapter 69.
Ceramic Architectural Coping Stones
Fired ceramic sloped caps for walls and parapets to shed water and protect edges in construction. Under HTS 6905.90.0050 as other architectural ceramic goods. Fired after shaping from clay per Chapter definition.
Porcelain Gutter Tiles
Glazed porcelain tiles shaped for roof edge gutters, fired to low water absorption for durability. HTS 6905.90.0050 for other ceramic constructional goods including roofing accessories. Meets porcelain definition: <0.5% water absorption, translucent.
Earthenware Ridge Crest Tiles
Hand-formed earthenware tiles for roof ridges, fired clay with >3% water absorption per US note. Classified HTS 6905.90.0050 as other roofing constructional ceramics. Essential for weatherproof peaked roofs.