Alumina
Part of: 69022010 — Bricks
N348791 · 2025-09-09 — The tariff classification of three ceramic fiber products and two ceramic bricks from China.
The merchandise under consideration is five items identified as TaoFibre Ceramic Fiber Blanket, TaoFibre Ceramic Fiber Paper, TaoFibre Ceramic Fiber Board, Refractory High Alumina Bricks, and Insulating Fire Bricks. Samples were submitted with your ruling request and were forwarded to the Customs and Border Protection Laboratory for analysis. This analysis has been completed. The TaoFibre Ceramic Fiber Blanket is a needled mat measuring 12.5 feet, 17 feet or 25 feet long, either 24 inches (61 centimeters) or 48 inches (122 centimeters) wide, and in thicknesses ranging from 0.25 inches to 2…
087895 · 1990-12-13 — Refractory products; Cruciform checkers; Firebricks; Furnace lining; Arch blocks; Stack blocks; QT refractory tiles; alumina; silica; silicon carbide
This is in reference to your request, in behalf of Corhart Refractories Corporation, for classification of certain refractory products of France under the Harmonized Tariff Schedule of the United States (HTSUS). FACTS: The refractory products listed were: Cruciform Checkers - firebricks of various shapes and sizes used to line regenerator chambers of furnaces. They are said to be comprised of a mixture of alumina and silica that exceeds 50 percent by weight. Arch Blocks (ER1681 SI N/RN) - refractory articles used in glass furnace superstructure, with 50.2 to 50.6 percent by weight alumina and…
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