ABSTRACT
The storage and containment of a fluid is usually dependent on the form of the fluid, its properties, and its intended purpose. Small quantities of fluids such as water may be appropriately contained in bottles and jugs, whereas considerably larger volumes may be contained in reservoirs and lagoons. Gases may be contained in enclosed vessels to prevent leakage and escape or even underground caverns created naturally or artificially such as those formed from removing rock salt as brine. In some cases, gases may be liquefied such as liquid petroleum gas (LPG) for storage since liquids occupy a far smaller volume than in the gaseous state and therefore a smaller volume of vessel is conveniently required. They do require, however, a strong-walled vessel required to contain the pressure necessary to maintain the fluid in a liquefied state.
