A triple shell tank includes an inner tank, an intermediate tank covering the inner tank, and an outer tank covering the intermediate tank. The inner tank includes an inner tank side plate, an inner tank roof, and an inner tank bottom plate. The intermediate tank includes an intermediate tank side plate, an intermediate tank roof, and an intermediate tank bottom plate. The circular steps of the intermediate tank side plate include a lowermost step formed of an intermediate tank side plate piece for height adjustment having a height corresponding to a height difference between the inner tank bottom plate and the intermediate tank bottom plate, and a second step on the lowermost step formed of an intermediate tank side plate piece arranged at a same height position as an inner tank side plate piece of a lowermost step in the circular steps of the inner tank side plate.

A method and apparatus for transporting a liquid gas container is described herein. The liquid gas container is transported at an increased internal pressure. Transporting the liquid gas container at an increased internal pressure distributes the downward load of the liquid gas container, such that the downward load of the liquid gas container is distributed more evenly or so that a greater amount of the downward load is felt in the center of the liquid gas container compared to the outer portion of the liquid gas container. This enables transport without cracking of a base support slab during transit when the support slab is only able to be supported from the center due to narrow road conditions.

A support structure is configured to hold a storage tank by being located at least underneath the storage tank. The support structure includes at least a metallic structure and at least one pad including at least concrete mixed with a powdery material, the pad being superimposed on the metallic structure.

A gas storage reservoir, an energy storage device, and a control method and a mounting method for the gas storage reservoir. An inner foundation structure surrounds the outer side of a ground film; an outer foundation structure surrounds the outer side of the inner foundation structure; the edge of an inner film is fixed to the inner foundation structure; an inner cable net is arranged on the outer surface of the inner film; an accommodating cavity is defined between the inner film and the ground film, and the inner film comprises a metal layer; an outer film structure covers the outside of the inner film structure; the outer film structure comprises an outer film and an outer cable net an interlayer cavity is defined between the outer film and the inner film; an air supply device is configured to inflate the interlayer cavity.

A triple shell tank includes an inner tank, an intermediate tank covering the inner tank, and an outer tank covering the intermediate tank. The inner tank includes an inner tank side plate, an inner tank roof, and an inner tank bottom plate. The intermediate tank includes an intermediate tank side plate, an intermediate tank roof, and an intermediate tank bottom plate. The circular steps of the intermediate tank side plate include a lowermost step formed of an intermediate tank side plate piece for height adjustment having a height corresponding to a height difference between the inner tank bottom plate and the intermediate tank bottom plate, and a second step on the lowermost step formed of an intermediate tank side plate piece arranged at a same height position as an inner tank side plate piece of a lowermost step in the circular steps of the inner tank side plate.