LPG Value Chain
LPG occurs naturally in crude oil and natural gas production fields, and is also produced during the oil refining process. It is a mixture of light gaseous hydrocarbons (e.g. propane, butane) which are gaseous at normal ambient temperature and atmospheric pressure, but made liquid by application of moderate pressure. At normal temperatures and pressures, LPG will evaporate, so it is supplied in pressurized steel cylinders. To allow for thermal expansion, these cylinders are typically filled to between 80% and 85% of their capacity.