ABSTRACT
The shape of the storage vessel for cryogens can widely vary. The vertical cryogenic vessel appears to have gained wider acceptance because it requires less installation area as compared to the horizontal vessel of the same capacity. These vessels would be the initial storage vessels from which the cryogen is transferred to specially designed, mobile cryogenic transport trailers or rail cars for delivery to other storage vessels at consumer locations. The storage container usually will consist of two vessels, one surrounding the other. The inner vessel is designed as the cryogenic liquid pressure container. Inner vessels are constructed of materials such as stainless steel, aluminum, or other materials capable of withstanding low cryogenic temperatures. An outer vessel which is not fabricated as a pressure vessel is used to protect the inner vessel and provide an insulated space between the two vessels.
