what is lpg

LPG stands for "Liquefied Petroleum Gas" and is a fuel gas that contains a flammable mixture of hydrocarbon gases, specifically propane, propylene, butylene, isobutane, and n-butane. It is primarily obtained from natural gas and oil production but is also produced increasingly from renewable sources. LPG is used as a fuel gas in heating appliances, cooking equipment, and vehicles. It is also used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer. When used as a vehicle fuel, it is often referred to as autogas or just gas. Varieties of LPG that are bought and sold include mixes that are mostly propane, mostly butane, and mixes including both propane and butane. In the United States, mainly two grades of LPG are sold: commercial propane and HD-5. Propane is a three-carbon alkane gas (C3H8) and is stored under pressure inside a tank as a colorless, odorless liquid. As pressure is released, the liquid propane vaporizes and turns into gas that is used in combustion.