| AEC Express | KBR |
| ABB Lummus | Lyondell-Citgo |
| Atofina | Lion Oil Co. |
| Baker-Petrolite | Marathon Petroleum |
| BOC Gases | Motiva Enterprises |
| BP Amoco Chemical | Murphy Oil |
| BP Refining | NCRA Refining |
| Chalmette Refining | NuStar Energy |
| Chevron USA | PCS Nitrogen |
| CHS, Inc. | PDVSA |
| Citgo Refining | Petro-Chem |
| Coffeyville Resources | Reliance Refining |
| Colonial P/L | Selas Fluid Processing |
| ConocoPhillips | Shell Chemical & P/L |
| ConocoPhillips P/L | Shell Refining |
| Countrymark Coop. | Sinclair |
| Dakota Gasification | Solutia |
| Dow Chemical | Suncor |
| Dynegy Power | Sunoco |
| Eastman Chemical | Supermetanol |
| El Paso Aruba Ref. | Syntroleum |
| Energy Overseas, Inc. | TEPPCO Crude Oil |
| Equilon P/L | Tesoro |
| Ergon Refining | Texaco, Inc |
| Explorer Pipeline | Tulsa Heaters, Inc. |
| Exxon Mobil | Total Petrochemicals |
| Flint Hills Resources | United Refining |
| Flying J | Valero Refining |
| Formosa Plastics | Valvoline |
| Foster Wheeler | Venco |
| Frontier Refining | Vista Chemical |
| Giant Refining | Vulcan Chemical |
| Holly Refining | Western Refining |
| Hovensa | Williams Energy |
| Jayhawk Pipeline | Wynnewood Refining |
Powered by Straxis Technology
