METHOD AND APPARATUS FOR MAINTAINING PRESSURE OF LNG CARGO TANK OF LNG STORAGE TERMINAL

摘要

A method and an apparatus for maintaining pressure of an LNG cargo tank of an LNG storage terminal are provided to remove the limitation for pressure of the LNG cargo tank by remarkably reducing the generating of flash gas during the unloading of LNG. A method for maintaining pressure of an LNG cargo tank of an LNG storage terminal is characterized in that pressure of the LNG cargo tank of the LNG storage terminal is allowed to be raised from 0.25 to 2 bars(gauge pressure), wherein the LNG storage terminal receives the LNG unloaded from the LNG carrier. The LNG storage tank of the LNG storage terminal is a membrane type or an independent tank type. The membrane type LNG storage tank is GTT Mark III type or GTT NO 96-2 type. The independent tank type LNG storage tank is MOSS type or SPB type.