CARGO TANK FOR EXTREMELY LOW TEMPERATURE SUBSTANCE CARRIER

摘要

The present invention relates to a cargo tank of an extremely low temperature substance carrier, comprising: a primary barrier including a primary main panel which is formed in a manner of connecting multiple insert panels or multiple unit panels with flanges and has at least one or more auxiliary wrinkles mounted in a length direction at the insert panels or the unit panels; a secondary barrier including a secondary main panel which is formed in a manner of connecting multiple insert panels and multiple unit panels with flanges; a primary insulation wall installed between the primary barrier and the secondary barrier; and a secondary insulation wall installed between the secondary barrier and a hull shell. The cargo tank of an extremely low temperature substance carrier according to the present invention is capable of: preventing, in advance, cracks due to shrinkage by arranging first cargo tank walls having primary wrinkle panels at a certain interval; preventing defects in the cargo tank by easily absorbing an impact due to a sloshing phenomenon of liquefied gas; preventing damage due to shrinkage by forming auxiliary wrinkles on a primary barrier of each of first, second and third cargo tank walls; more easily absorbing impact due to a sloshing phenomenon of liquefied gas; and selectively applying the first to third cargo tank walls having different types of structures to each part of the cargo tank in which different sloshing phenomena are shown, thereby improving reliability of the cargo tank.