INSULATION BOARD AND LIQUEFIED NATURAL GAS STORAGE TANK INCLUDING THE SAME

摘要

PURPOSE: An insulation board and a LNG cargo containment system having the same are provided to reduce contraction of an insulation board by becoming narrow the width of the insulation board's surface adjacent to LNG because the top width of the insulation board is formed smaller than the bottom width thereof. CONSTITUTION: An insulation board comprises a top insulation board(200), a main secondary barrier(300), and a bottom insulation board(400). The top insulation board is coupled to a primary barrier(100). The main secondary barrier is coupled to the top insulation board. The bottom insulation board is coupled to the main secondary barrier and installed in an inner hull(1). Side walls of the bottom insulation board are inclined obliquely in order to have smaller width of the top surface of the bottom insulation board contacting to the main secondary barrier than the bottom surface thereof contacting to the inner hull.