| Naics index | Naics index description |
|---|---|
| 237120 | Natural gas processing plant construction |
| 237120 | Oil and gas field distribution line construction |
| 237120 | Oil pipeline construction |
| 237120 | Oil refinery construction |
| 237120 | Petrochemical plant construction |
| 237120 | Petroleum refinery construction |
| 237120 | Pipe lining (except thermal insulating) contractors |
| 237120 | Pipeline construction on oil and gas field gathering lines to point of distribution on a contract basis |
| 237120 | Pipeline rehabilitation contractors |
| 237120 | Pipeline wrapping contractors |