Liquified Petroleum Gas (LPG) is type of gas mixture of flammable hydrocarbon gases that include propane, butane, isobutane and mixtures of those three LPG gases. it is commonly use for heating, cooking, and Autogas (fuel for LPG cars and vehicles). It comes from natural gas processing and petroleum refining and can all be compressed into liquid at relatively low pressures. Being pressured, LPG is easy to store and transport.