Liquefied Petroleum Gas (LPG)

A petroleum-based hydrocarbon product with the main components being propane (C3H8) or butane (C4H10) or a mixture of both, in English: Liquefied Petroleum Gas (abbreviated as LPG). At normal temperature and pressure, these hydrocarbons are in a gaseous state, and when compressed to a certain pressure or cooled to a suitable temperature, they change to a liquid state.