Abstract: This container system is designed in such a way that wastes which cannot be differentiated according to their effects can be stored for an indefinite period in the system which is self-contained and hence cut off from the environment, and these wastes can also be recovered at any time without polluting the environment. For this purpose this container concept is designed as a double-walled system, consisting of an inner container (2) as a casing for the waste and an outer container (1) as a protective container, with an air space as an inspection and working chamber (4) between the two. The inner container (2) is designed in such a way that it can be visually, mechanically, chemically and/or biologically checked, repaired and renewed completely and on all sides at any time while full.

Abstract: In a double-walled tank for low-temperature liquids, such as liquid gas, an inner tank forming a primary safety casing is enclosed by an outer tank forming a secondary safety casing. The outer tank is constructed of reinforced concrete. A layer of thermal insulation is provided between the inner and outer tanks. The inside surface of the outer tank at least on the side wall and base is covered first by a vapor-tight layer and then by a layer of a liquid-tight thermal insulation material, preferably polyurethane foam.

Abstract: In a double-walled tank for low-temperature liquids, such as a liquid gas, an inner tank forms a primary safety casing while an outer tank, enclosing the inner tank, forms a secondary safety casing. The inner tank includes a base and an upwardly extending side wall with at least the base being formed of metal. Preferably, the outer tank is formed of reinforced concrete. A thermal insulation layer is located between the two tanks, a ring of reinforced concrete encircles the junction of the side wall and base of the inner tank. The ring is L-shaped and in radial section has an upwardly extending leg in contact with the outside surface of the side wall and a generally horizontal leg in contact with the radially outer part of the lower surface of the base.