Cryogenic tank

A cryogenic tank having a dual construction with an inner tank for storing low-temperature liquefaction fluid therein, an outer tank enclosing a bottom and a shell portion of the inner tank, and an insulation interposed between the inner tank and the outer tank,

• wherein said inner tank includes a bottomed inner vessel comprising concrete and an inner cold heat resistant relief covering an inner face of the bottomed inner vessel;
• said outer tank includes a bottomed outer vessel comprising concrete and an outer cold heat resistant relief covering an inner face of the bottomed outer vessel;
• said outer cold heat resistant relief includes a bottom side cold heat resistant relief provided on an inner face of a bottom of said bottomed outer vessel;
• and
• on top of the bottom side cold heat resistant relief comprising perlite concrete, there is disposed a bottom base for the bottomed inner vessel comprising concrete, via an insulation comprising at least one perlite concrete in a hollow tubular form and a particulate perlite charged in said hollow tubular form.