| SIC Code | Business or Product | Registrants |
|---|
|  | | |
| 3569 | Gas producers (machinery) | 71 |
| 3569 | Gas separators (machinery) | 71 |
| 7389 | Gas systems, contract conversion from manufactured to natural gas | 2,045 |
| 3443 | Gas tanks, metal plate | 35 |
| 3714 | Gas tanks, motor vehicle | 366 |
| 3511 | Gas turbines, mechanical drive | * |
| 3491 | Gas valves and parts, industrial | * |
| 3548 | Gas welding equipment | * |
| 3533 | Gas well machinery and equipment | 81 |
| 1389 | Gas well rig building, repairing, and dismantling on a contract basis | 171 |
| 4925 | Gas, mixed natural and manufactured: production and distribution | * |
| 2911 | Gas, refinery or still oil: produced in petroleum refineries | 172 |
| 3433 | Gas-oil burners, combination | 38 |
| 5169 | Gases, compressed and liquefied: except liquefied petroleum gas – wholesale | * |
| 2813 | Gases, industrial: compressed, liquefied, or solid | * |
| 5172 | Gases, liquefied petroleum: except bulk stations and terminals – wholesale | 64 |
| 2911 | Gases, liquefied petroleum: produced in petroleum refineries | 172 |
| 5085 | Gaskets – wholesale | * |
| 3053 | Gaskets, regardless of material | * |
| 1711 | Gasline hookup-contractors | * |
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* There are SEC Registrants, but only at the 2- or 3-digit SIC Code levels. |
