Molgas conducts first-ever de-gassing of LNG-fuelled vessel in UK
LNG supplier Molgas announced that it recently completed the first-ever LNG de-gassing operation on an LNG-powered vessel in the UK.
IMAGE: De-gassing operation conducted on LNG-powered ferry MV Glen Sannox. AD fuels
The operation was carried out on board MV Glen Sannox, an LNG-powered dual-fuel ferry operated by CalMac Ferries, during its annual maintenance at Inchgreen, Greenock.
LNG road haulage provider AD Fuels provided on-site operational support for the process.
De-gassing means clearing all LNG vapour out of a ship’s fuel tanks. When LNG tanks are to be refilled, serviced or decommissioned, the tanks must be completely free of gases to create a safe working environment.
In this case, the de-gassing was carried out in two stages. First, flaring burned off any remaining methane in a controlled flame, so the tank is cleared of fuel. Then nitrogen purging was used to fill the tank with non-flammable nitrogen, which pushed out any leftover LNG vapour and removed the risk of ignition.
Once free of flammable vapour, the vessel was confirmed safe for all maintenance work.
By Nachiket Tekawade
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