Mitsui along with MODEC was the prime contractor of the world's first steel hulled new build LPG FSO for the Escravos gas field, offshore Nigeria.

The purpose of this project was the Nigerian government's decree to stop flaring of gas from offshore fields. The LPG FSO converts ethane, propane and butane components of the gas stream into liquid products.

The liquid LPG in high pressure and normal temperature is transferred to the LPG FSO and liquefied to LPG in normal and low pressure. The liquid products are stored in tanks of the FSO hull prior to being offloaded to LPG tankers that are used to transport the LPG to market.