The liquefied natural gas (LNG) storage tank for vessel 801 is ready to be delivered to the shipyard for installation following the successful completion of tests, including inspection under the approval of Lloyd’s Register of Shipping, the classification society for the vessel.

The impressive tank is over 20 metres in length, 4.5 metres high and weighs over 80 tonnes, making it the largest and heaviest single component on the new vessel. It has an internal volume of 149m3 and can hold approximately 70 tonnes of LNG.

The tank has been designed by Wartsila, the main contractor for the ship’s propulsion package, and has been built in China by Furuisi under contract to Wartsila. Furuisi is a highly-experienced manufacturer of LNG tanks for road vehicles, land installations and ships. The tank will be transported to Scotland by road and sea.

Inside of the tank

Inside the tank connection space

The tank is constructed using stainless steel material, made up of an inner and outer tank, with an insulation material placed in between. A vacuum has been created in the space between the tanks to provide maximum thermal insulation between the cold LNG (-163°C) and the machinery space the tank will be located in. This configuration also acts as a containment barrier in the event of any leak of LNG from the inner tank.

A room is attached to one end of the tank – the tank connection space or TCS – and this contains the process control equipment for the system to allow gas to be supplied to the engines in the correct quantities as required.

Categories: Ferries, MV Glen Sannox & MV Glen Rosa, Projects