Industry: 3255—Clay Refractories
Establishments primarily engaged in manufacturing clay firebrick and other heat resisting clay products. Establishments primarily engaged in manufacturing nonclay refractories and all graphite refractories, whether of carbon bond or ceramic bond, are classified in Industry 3297.
| Brick, clay refractory: fire clay and high alumina | Insulating firebrick and shapes, clay |
| Castable refractories, clay | Kiln furniture, clay |
| Cement, clay refractory | Ladle brick, clay |
| Clay refractories | Melting pots, glasshouse: clay |
| Crucibles, fire clay | Mortars, clay refractory |
| Fire clay blocks, bricks, tile, and special shapes | Plastics fire clay bricks |
| Firebrick, clay | Plastics refractories, clay |
| Floaters, glasshouse: clay | Rings, glasshouse: clay |
| Foundry refractories, clay | Saggers |
| Glasshouse refractories | Stoppers, glasshouse: clay |
| Heater radiants, clay | Tank blocks, glasshouse: clay |
| Hot top refractories, clay | Tile, clay refractory |
| Codes |
Titles | Total Marketable US Businesses |
| 32550000 | Clay refractories | 103 |
| 32550100 | Plastic refractories | 4 |
| 32550101 | Plastic fire clay bricks | 0 |
| 32550200 | Glasshouse refractories | 3 |
| 32550201 | Floaters, glasshouse: clay | 0 |
| 32550202 | Melting pots, glasshouse: clay | 3 |
| 32550203 | Stoppers, glasshouse: clay | 0 |
| 32550204 | Tank blocks, glasshouse: clay | 0 |
| 32550300 | Tile and brick refractories, except plastic | 7 |
| 32550301 | Brick, clay refractory | 13 |
| 32550302 | Fire clay blocks, bricks, tile, or special shapes | 9 |
| 32550303 | Firebrick, clay | 11 |
| 32550304 | Ladle brick, clay | 2 |
| 32550305 | Tile, clay refractory | 4 |
| 32550400 | Firing oven and accessories, clay | 3 |
| 32559901 | Castable refractories: clay | 4 |
| 32559902 | Cement, clay refractory | 6 |
| 32559903 | Foundry refractories, clay | 3 |
| 32559904 | Heater radiants, clay | 4 |
| 32559905 | Hot top refractories, clay | 1 |
| 32559906 | Mortars, clay refractory | 1 |
