What this code covers
This code uses the description for 327120 · Clay Building Material and Refractories Manufacturing.
This industry comprises establishments primarily engaged in shaping, molding, baking, burning, or hardening clay refractories, nonclay refractories, ceramic tile, structural clay tile, brick, and other structural clay building materials. A refractory is a material that will retain its shape and chemical identity when subjected to high temperatures and is used in applications that require extreme resistance to heat, such as furnace linings.
Cross-References. Establishments primarily engaged in--