TAI has worked with the Client for a number of years providing engineering designs for several DTI compressor station projects for this client.  The Client requested TAI to provide an engineering services proposal for the completion of construction documents for the “Pepper Compressor Station 2012 Construction Project”.  TAI utilized “For Bid” documents generated by the Client as a guideline to develop the documents “For Construction”. These drawings were combined with electrical drawings by TAI to form a complete project package.

Relevant Structural Engineering Details:

• The completed design considered construction phasing in order to keep the station “on-line” while the transition was in process
• Critical systems were slated to be installed first so that remaining or redundant systems could remain operational while construction was completed
• Compressor foundations had to be “massive” to prevent vibration and movement
• Compressor foundations were constructed in extremely poor soil that had to be de-watered and modified prior to construction

TAI provided construction documents for the foundations of all equipment, buildings, pipe supports, and tank dikes. TAI coordinated with a geotechnical engineer regarding the most cost effective solution for the rigid frame foundations since the soil conditions in the area were not suitable for a traditional foundation design. TAI also provided engineering services for the Pepper Station as it added a 3500HP compressor to an existing facility in West Virginia. The project also included adding five (5) new buildings (Compressor, MCC, Utility, Auxiliary, and Measurement) and a dehydration (DEHI) unit. The main compressor and DEHI were specified by the client.

The scope of work included The Construction Drawing Package which included progress drawings and the specification package submissions needed for scope clarification and review. The 50% submission was included to finalized PFD’s, P&ID’s, General Arrangement drawings, progress piping drawings, structural equipment placement drawings, I/O list and preliminary block communication drawing for project scope confirmation. The TAI’s project and design team attended weekly teleconference design review meetings and was primarily responsible for coordinating resources, monitoring design progress engineering costs, QC and scope changes.

KEY PROJECT RESPONSIBILITIES

• General Construction Documents—Reviewing, Updating, & Editing Drawings
• Mechanical/ Process Engineering—Visits and Drawings
• Structural Engineering—Visits and Drawings
• Instrumentation and Controls Engineering—Design, Drawings and Visits
• Cost Estimations/ Scheduling—Services
• Construction Support Services

This project upgrade featured installation of a Caterpillar 3606 natural gas compressor, new building including a 56’x 64’ compressor building, 20’x 48’ MCC building and utility building along with a new regen dehydration skid, compressor water cooler, emergency generator, after cooler, gas separators and other project related equipment.

• Structural Engineering for Compressor Building Extension
• Bridgeville & Delaware City Compressor Stations
• Compressor Station Electrical Upgrade