Lng storage tank installed inside the ship and manufacturing method the tank

The present invention relates to a liquefied natural gas storage tank structure for being provided inside the vessel, to simplify the tank structure, which is installed in the vessel interior to transport the liquid in the liquefied natural gas in the cryogenic state and simultaneously shortening the assembling process, the liquid tight a is an object of the present invention to firmly hold tank, providing a structure for a liquefied natural gas storage are installed a stress due to mechanical strain within the vessel can be easily resolved than. In order to achieve the above object, the liquefied natural gas storage tank structure according to the present invention comprises a storage tank provided in the hull interior of the vessel for storing the liquefied natural gas, the two consecutive sealing wall, and two insulating walls and the primary sealing wall of the sealing walls in the storage tank structure in which the order of the first insulation barrier, a secondary sealing wall and the secondary heat insulating wall in a lower portion in contact with the liquefied natural gas, which is stored in the storage tank , the primary sealing wall is supported by an anchor portion coupled to the hull and mechanically, the heat insulating wall is slidably disposed between the primary sealing wall and the inner wall surface of the hull.