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Addressing the UK’s Needs for Flexible Gas Storage

Underground gas storage is a vital element in securing the UK’s energy future. Costain undertook a peer review of the FEED design carried out for a gas processing plant at E.ON’s underground gas storage facility, identifying a number of key improvements along with other modifications to address the final design basis and provide all required functionality.

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Advisory and Concept Development
Specialist Design
Complex Project Delivery


Withdrawal of 22 MMSCFD gas

for processing from 8 separate underground caverns

Agile plant operation

capable of starting up and stopping in only 30 minutes to respond to gas demands

Year-round availability

maintainable without affecting plant performance

Controlled remotely

minimal on-site personnel

The scope of the Costain design included:

  • Three 8MW, compact, airtight, oil-free, high speed variable drive compressors with harmonic filters, associated high voltage infrastructure and control equipment
  • Liquid separation
  • Gas heating
  • Glycol dehydration
  • Gas metering
  • Analysers
  • High Integrity Protection Systems

Costain was awarded the EPCm (engineering, procurement and construction management) contract to complete the gas plant infrastructure project. This project formed part of the development of one of the UK’s most flexible underground gas storage facilities. The facility allows a rapid response to daily fluctuation in gas demand, balancing the UK daily gas market.

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