Float glass under heading 7005 is flat glass produced by the float process, which may be surface-ground or polished but has not been further processed into a safety product. Safety glass under heading 7007 has been specifically manufactured — either tempered (heat-treated) or laminated (bonded layers) — to reduce injury risk upon breakage. Once float glass is tempered or laminated, it moves to 7007 regardless of its origin as float glass.

Glass fibers and articles thereof, including glass wool insulation batts, glass fiber rovings, and woven glass fabric, classify under heading 7019 in chapter 70. They do not fall in the textile chapters (50–63) because chapter 70 specifically covers glass fiber. However, composite articles where glass fiber is a minor component of a larger article may classify by the essential character of the finished product.

Yes. Antidumping and countervailing duty orders have been applied to certain flat glass and glass fiber products from specific countries. The scope of each order is product- and country-specific, so importers should verify current order status with the Department of Commerce and confirm whether their specific product and supplier country fall within scope before importing.