LPG: Liquefied Petroleum Gas (LPG) is a mixture of hydrocarbons, which are in gaseous state at ambient temperature and pressure but these are liquefied under pressure for easy storage, handling and transportation in pressurized vessels.
It is obtained through Crude Oil refining or from Natural Gas through fractionation. Butane and Propane are the main constituent hydrocarbon's in LPG. Others present in traces or small fractions are Iso-butane, butylene, n-butane, propylene etc.
LPG is highly inflammable. LPG is odourless , color less and is heavier than air. Ehtyle Mercaptan is added as odouriser for detection of any leak. LPG as per IS: 4576 is being marketed in India.