LPG is an abbreviation of Liquid Petrol Gases. The butane and propane gases obtained during the distillation of crude oil are the two main petroleum gases. After liquefying these gases, they are mixed at certain rates or offered for sale in pure form and become commercially important. Today, however, LPG is used commercially for mixed gas consisting of 30% propane-70% butane mixture. The mixture ratio of the mixed gas in the world is very different, the rate of propane in cold countries can be even higher, as it is 50% -50%.