In atmospheric conditions, LPG gas will be shaped. The volume of liquefied petroleum gas in liquid form is smaller than in the form of gas for the same weight. Therefore the liquefied petroleum gas marketed in liquid form in pressurized metal tubes. To allow the occurrence of heat expansion (thermal expansion) of the liquid LPG tubes they contain, not filled in full, only about 80-85% of its capacity. The ratio between the volume of the gas is vaporized gas in liquid state varies depending on composition, pressure and temperature, but is typically around 250:1.
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