Shell Corrib Gas Terminal


Shell Corrib Gas Terminal


Mercury Engineering was contracted to carry out the complete Mechanical, Electrical and Instrumentation services on the new onshore terminal. The Corrib Field, being developed by Shell, is a gas field located in 350m of water some 60 to 65 km off the County Mayo coastline. The field will be developed as a long-range subsea tieback to an onshore facility

The Corrib Gas Pipeline is 20 inches (50 centimetres) in diameter. The wall of the pipeline is more than one inch thick (27 millimetres) and is made of high-grade carbon steel. By way of comparison, Bord Gais Eireann pipelines running throughout the country are 9 millimetres thick.

The outside of the pipeline will have several layers of protective coating, including plastic and concrete, to protect it from external corrosion.

Internal corrosion is controlled by the continuous injection of corrosion inhibitor via the umbilical. Corrosion is monitored in real time by a subsea corrosion monitoring spool. An internal inspection tool, referred to as a ‘smart pig’, will be pushed through the pipeline at intervals to gather data on the internal condition of the pipeline and monitor the integrity of the pipeline throughout.

As a safety measure, the pipeline was originally designed to withstand 345 bar in the highly unlikely event of pressure increasing above the normal operating pressure.

Mayo, Ireland

€ 158,000,000

  • 48 months

  • Multidisciplinary
  • Mechanical
  • Electrical