PURPOSE: To reduce the type of gas encapsulated container by employing only one type of X-shaped coupling flange and only one type of Y-shaped bus penetration flange in the gas encapsulated container.

CONSTITUTION: Containers A, B, C are made through aluminum alloy casting. Container A gas flanges A1, A4 opening respectively upward and downward and a flange A2 opening sideway whole container B has a flange B1 opening upward, a flange B2 opening horizontally and flanges B3, B4 opening perpendicularly therewith and arranged back to back each other and container C has flanges C1, C2 opening back to back each other. The flanges A2, A3, A4, B1, C1 are coupled one another and have identical X-shape. Flanges B3, B4 are penetrated with a bus and have identical Y-shape. Other flanges may have random shape.