Storage of liquid and gaseous fuels. Practically speaking, construction contractors can store propellants only in iron barrels or tanks, usually of a lighter type. Storage of liquid fuels should, provide these materials: 1) .protection against cavities ,quantitative or completely eliminating these losses, 2) securing the properties of liquid fuels, 3) protection against contamination, which would prevent the use of propellants for their intended purpose. Losses may be due to volatility, leakage, spilling. Contamination can be caused by foreign bodies, recently, water and oils. Changing the properties of fuels can be caused by the excessive loss of volatile components, water admixtures causing fuel stratification (blends), in which the components are alcohols. Besides, all chemical transformations, resulting from harmful chemical or mechanical impurities, can render the liquid fuel unsuitable, usage (e.g. the formation of resins in the fuel or decomposition of admixtures increasing the octane number, like lead tetraethyl in ethyl). Even in the areas of larger storage bases, and even more so in the areas of makeshift warehouses, there can be no question of perfectly arranged storage facilities for propellants. Thus, provisionally, propellants are often deposited with other materials. In such warehouses, liquid fuels are stored in barrels. The barrels should be filled to capacity with fuel 98%,. the remaining 2% is spent on thermal movements of fuels, resulting from temperature variations.