What is liquefied natural gas (LNG)?

Is LNG (liquefied natural gas) the same as LPG?

LPG (liquid petroleum gas) is often confused with LNG (liquefied natural gas) and vice versa. LPG is composed primarily of propane (upwards of 95%) and smaller quantities of butane, and is used primarily for residential and commercial applications. LPG is kept liquid by confining it under high pressure. The storage of LPG under pressure, in contrast to the storage of liquefied natural gas at a very low temperature, necessitates the use of entirely different material properties, thicknesses, insulating materials and standards.

LNG (liquefied natural gas) consists almost entirely of methane and is odourless, colourless, non-corrosive and non-toxic. It is not possible to liquefy natural gas (methane) solely by pressurising it so unlike LPG, LNG (liquefied natural gas) is kept liquid at minus 160 degrees Celsius but at atmospheric pressure. If LNG is exposed to air, the temperature of the liquid will stay at approximately minus 160 degrees Celsius but at its surface, the LNG will evaporate into natural gas vapour (methane) which is lighter than air and is dispersed by the wind making ignition unlikely.