Balfour Beatty Civil Engineering Ltd

Isle of Grain Liquefied Natural Gas (LNG) Expansion Project

CB&I John Brown awarded Balfour Beatty Civil Engineering (BBCEL) the civil works package for the Grain Liquefied Natural Gas (LNG) Expansion Project.

Grain LNG Limited is a wholly owned subsidiary of National Grid Transco plc and is currently constructing a LNG importation and regasification terminal at the Isle of Grain in Kent. Grain LNG Limited will own and operate the terminal. CB&I John Brown is the EPC contractor for the project.

The projects scope covers the construction of three concrete LNG tanks measuring 193,000m³ each. This will create a total storage capacity of 770,000m³ of LNG at the Grain site. The new tanks will be the largest of their kind in the world.

The work also involves associated process civils foundations, earthworks, roadworks, concrete building foundations, concrete tanks, concrete trenches and pits, culverts, drainage, paving and underground utility systems.

At source, gas is chilled to approximately -160 degrees Celsius and maintained at that temperature for shipping and delivery into the tanks.

The base of each tank can be heated by a system of tubes to prevent permafrost in the ground below it. This is important to prevent ground heave and subsequent damage to the tank base.

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