Bricks, blocks, tiles and other ceramic goods of siliceous fossil meals (for example, kieselguhr, tripolite or diatomite) or of similar siliceous earths
Bricks, blocks, tiles and other ceramic goods of siliceous fossil meals (for example, kieselguhr, tripolite or diatomite) or of similar siliceous earths
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 6901.00.00.00
Diatomaceous Earth Firebrick
A high-temperature resistant brick made from diatomaceous earth (kieselguhr), a siliceous fossil meal, shaped and fired for use in industrial furnaces and kilns. It falls under HTS 6901.00.00.00 as a ceramic good specifically of siliceous fossil meals, providing superior insulation due to its low thermal conductivity.
Kieselguhr Insulating Brick
Insulating ceramic brick produced from kieselguhr (diatomite), offering excellent thermal resistance for boiler linings and high-heat applications. Classified under HTS 6901.00.00.00 due to its composition from siliceous fossil meals fired after shaping.
Tripolite Ceramic Block
Heavy-duty ceramic block made from tripolite, a siliceous fossil earth similar to diatomite, used in furnace construction. HTS 6901.00.00.00 covers such goods explicitly including 'similar siliceous earths' that are shaped and fired.
Diatomite Pool Filter Block
Ceramic block composed of diatomaceous earth for use in swimming pool filtration systems, providing high porosity after firing. Falls under HTS 6901.00.00.00 as 'other ceramic goods' of siliceous fossil meals.
Kieselguhr Roofing Tile
Lightweight roofing tile manufactured from kieselguhr for thermal insulation in construction. HTS 6901.00.00.00 includes tiles of siliceous fossil meals, distinct from common clay tiles.
Tripolite Absorbent Brick
Absorbent ceramic brick from tripolite used in industrial spill control and chemical absorption. Classified in HTS 6901.00.00.00 for ceramic goods of similar siliceous earths fired after shaping.
Diatomaceous Earth Kiln Shelf
Fired ceramic shelf made from diatomite for supporting pottery in kilns, valued for lightweight insulation. HTS 6901.00.00.00 applies to such 'other ceramic goods' of siliceous fossil meals.
Siliceous Earth Acoustic Tile
Acoustic absorption tile crafted from fired siliceous fossil earths like diatomite for soundproofing walls. Covered by HTS 6901.00.00.00 as tiles of similar siliceous earths.
Diatomite Thermal Insulation Block
High-porosity thermal insulation block from diatomaceous earth for ovens and high-heat enclosures. HTS 6901.00.00.00 specifically for blocks of siliceous fossil meals.
Kieselguhr Catalyst Support Brick
Ceramic brick from kieselguhr used as inert support for chemical catalysts in reactors. Falls under HTS 6901.00.00.00 for ceramic goods of siliceous fossil meals.