Principal Technology engineering design consulting services prototype production
EPC Projects

Principal Technology provides single point of control, turn-key EPC services on a lump sum or cost reimbursable basis. Following are highlights of our recent projects:

Urethane Production Facility

Principal Technology supplied detailed design, procurement and construction support services for a urethane adhesive facility in North Texas. Starting with the customer’s proprietary process design and critical equipment, we provided engineering and design services, procurement services for the utility and secondary process equipment, developed and integrated the batch process control system, and provided construction and start-up support for the plant.


Principal Technology supplied an 8.6 LTPD Sulfur Recovery Unit (SRU), Tail Gas Treating Unit (TGTU), and Incinerator as a part of Countrymark Energy Resources’ Diesel Fuel Processing Complex in Mount Vernon, Indiana. Countrymark Energy Resources is the oil exploration and production division of Countrymark, Indiana’s only American-owned oil exploration, production, refining and marketing company. In addition to the Mount Vernon refinery, the company owns and operates several fuel terminal locations in Indiana and Kentucky.

The Diesel Fuel Processing Complex allows Countrymark to produce Ultra Low Sulfur Diesel (ULSD) fuels that meet the reduced sulfur content levels required by the EPA as of June 1, 2006. Countrymark’s flagship products include Super Dieselex-4, off-road diesel fuel; Premium Diesel-R, on-road diesel fuel; PLUS gasoline; and Countrymark Advantage Lubricants. Countrymark fuels and lubricants are distributed to farms, fleets and families through a network of member cooperatives. These cooperatives own and operate more than 90 Countrymark branded fuel stations and more than 200 fuel and lubricant delivery routes located in Indiana, Ohio, Michigan, Illinois and Kentucky.

Principal Technology supplied the equipment on eight modules that were fabricated off-site and shipped by barge and truck for on-site installation. Principal Technology’s scope included all engineering, design, procurement, fabrication, construction support, operator training, and start-up assistance. Taking advantage of our modularized packaged systems, the project was completed on budget and was operating several months prior to the EPA deadline


Principal Technology provided the Tesoro Corporation with all engineering, design, procurement, fabrication, construction support and start-up assistance to upgrade their existing 20 LTPD Sulfur Recovery Unit to 30 LTPD. This project supported the expansion of their Kenai, Alaska refinery, which included the addition of a Distillate Desulfurization Unit.

Based in San Antonio, Texas, Tesoro Corporation, a Fortune 150 company, is an independent refiner and marketer of petroleum products. Tesoro, through its subsidiaries, operates seven refineries in the western United States with a combined capacity of approximately 665,000 barrels per day. Tesoro’s retail-marketing system includes more than 1,215 branded retail stations, of which more than 425 are company operated.

Principal Technology delivered all the equipment required for the upgrade on modules fabricated off-site. The modules arrived in "set and go" condition to minimize on-site construction. The equipment, instruments, electrical, piping, and insulation was fully inspected and tested prior to leaving the fabrication shop so only a few interconnecting lines required installation in the field prior to commissioning.

The module also featured an SRU Controls Enclosure containing everything required to control the unit on-site including the Foxboro DCS processor and I/O, Allen Bradley Control Logix Shutdown System, and local control panel functions. On-site Principal Technology connected the control system to the Central Control Room through a redundant fiber optic network.

Consulting Projects

Principal Technology’s typically provides consulting services through our Texas licensed Professional Engineering staff and tailors these services to the specific objectives of our clients. Our Consulting Service portfolio includes:

  • Unit Performance Studies and Equipment Audits
  • Process Hazards Analysis, including HAZOP and LOPA
  • Environmental Risk Evaluation
  • Expert Witness Testimony and Case Evaluation
  • Planning Studies
  • Operations Troubleshooting Support

A partial list of Consulting Service customers served includes:

  • Aquila Gas Pipeline
  • Chevron Phillips Chemical Co.
  • ConocoPhillips
  • Eagle Mountain Pipeline Co.
  • Eastman Chemical Co.
  • Enogex
  • Holley Corporation
  • Hunt Oil Company
  • Peerless Mfg. Co.
  • Placid Refining Company
  • Rockline Industries
  • Tesoro Refining
  • Yemen Hunt Oil