WHAT IS?      Liquefied Petroleum Gas (LPG) is a mixture of condensable gases present in natural gas or dissolves at petroleum. It obtains as result of refining oil process and natural gas recovering plants. It is inodorous and uncoloured but with the addition of an odoriferous it gives gases a pestilent smell to permit its identification.   TYPES OF LPG    It could be butane, propane or both. Butane: consist in a mixture of butane, butylenes and other minority compounds (propane, pentane, etc). Also could have a maxim of 50% propane.   Propane: is a mixture of propane, propylene and other minority compounds (ethane, butane, etc). Also could have a maxim of 30% of butane.       STATUS    At atmospherically pressure and ambient temperature (1 atmosphere and 20ºC), liquefied petroleum gas is in gaseous status.    To obtain liquid at atmospherically pressure, butane temperature has to be less than -0,5ºC and -42,2ºc for propane. Otherwise, to obtain liquid at ambient temperature, LPG has to be submitted to pressure. In butane case, pressure has to be higher than 2 atmospheres, and more than 8 atmospheres for propane.    One litre of liquid could be transformed in 272,6 litres of propane gas, and 237,8 litres of butane gas.     APPLICATIONS ADVANTAGES     Division into tanks (butane) and cylinders (propane)     Industrial Sold (propane)     Auto elevators (propane)     Olefins used in plastic production     Vehicle fuel (110 RON)     Refinery fuel     Domestic fuel    Its consumption rounds the 200 millions of tons annually.    It is versatile, abundant and easy to transport because of its liquefied capacity, reducing the temperature or increasing moderately the pressure. So it could be transport in liquid status or heating like gas.    Furthermore, is considerate a clean energy due to its free residues and micro particles combustion.