| 摘要 |
A pressure test method of a reliquefaction apparatus of an LNG(Liquefied Natural Gas) ship is provided to reduce the transportation cost by moving a great quantity of liquid nitrogen at a time by using a tank lorry. A pressure test method of a reliquefaction apparatus of an LNG ship for inspecting airtightness of a connected part of the reliquefaction apparatus reliquefying BOG(Boil-Off Gas) generated in a cargo hold of the membrane LNG ship and re-transferring the reliquefied BOG to the cargo hold comprises the steps of: charging a tank lorry(10) with liquid nitrogen needed for a test during a gas charging factory; storing the liquid nitrogen charged in the tank lorry, in a liquid nitrogen storage tank(20) by moving the tank lorry filled with the liquid nitrogen, to the compression test place; pressing the liquid nitrogen filled into the liquid nitrogen storage tank, by a pressure pump(30); forming nitrogen gas by vaporizing the compressed liquid nitrogen by a vaporizer(40); and providing nitrogen gas to the reliquefaction apparatus through a manifold(50). |
