Industry: 3321—Gray and Ductile Iron Foundries
Establishments primarily engaged in manufacturing gray and ductile iron castings, including cast iron pressure and soil pipes and fittings.
| Brake shoes, railroad: cast iron | Gray iron foundries |
| Car wheels, railroad: chilled cast iron | Ingot molds and stools |
| Castings, compacted graphite iron | Manhole covers, metal |
| Castings, gray iron and semisteel | Nipples, pipe: pressure and soil pipe-cast iron |
| Cooking utensils, cast iron | Nodular iron castings |
| Couplings, pipe: pressure and soil pipecast iron | Pipe and fittings, soil and pressure: cast iron |
| Ductile iron castings | Railroad car wheels, chilled cast iron |
| Elbows, pipe: pressure and soil pipecast iron | Rolling mill rolls, iron: not machined |
| Fittings, soil and pressure pipe: cast iron | Sash balances, cast iron |
| Foundries, gray iron and semisteel | Sewer pipe, cast iron |
| Gas pipe, cast iron | Water pipe, cast iron |
| Codes |
Titles | Total Marketable US Businesses |
| 33210000 | Gray and ductile iron foundries | 78 |
| 33210100 | Cast iron pipe and fittings | 25 |
| 33210101 | Pressure pipe and fittings, cast iron | 14 |
| 33210102 | Sewer pipe, cast iron | 9 |
| 33210103 | Soil pipe and fittings: cast iron | 2 |
| 33210104 | Water pipe, cast iron | 10 |
| 33219901 | Cooking utensils, cast iron | 10 |
| 33219902 | Ductile iron castings | 30 |
| 33219903 | Gray iron castings, nec | 215 |
| 33219904 | Gray iron ingot molds, cast | 6 |
| 33219905 | Manhole covers, metal | 29 |
| 33219906 | Railroad car wheels and brake shoes, cast iron | 8 |
| 33219907 | Rolling mill rolls, cast iron | 3 |
