Natural Gas Liquids (NGLs)
Heavier hydrocarbons found in natural gas production streams and extracted for disposal separately. Within defined limits ethane, propane and butane may be left in the gas to enrich the Calorific Value. Whether to extract them or not is largely a commercial decision. Heavier fractions which are liquids at normal temperatures and pressures will be removed. The terms Natural Gas Liquids and Condensates are in practice used virtually interchangeably. Rather confusingly, there is no agreement on whether the term NGLs includes or excludes LPGs and both usages are current.