Basic properties and characteristics of LPG: Liquefied petroleum gas (abbreviated as LPG-Liquified Petroleum Gas), also known as gas, is a gas mixture consisting mainly of Propane (C3H8) and Butane (C4H10) that has been chemically liquid. The composition of the LPG mixture has a Propane/Butane ratio of 50/50 ±10% (mol).

Some physical properties of LPG: At a temperature greater than 0oC in normal air with a pressure equal to atmospheric pressure, LPG is converted from liquid to vapor according to the volume ratio of 1 liter of LPG. liquefied to about 250 liters in the vapor state. The evaporation rate of LPG is very fast, easily diffused, mixed with air into an explosive mixture. The density of LPG is lighter than that of water: Butane from 0.55 to 0.58 times, Propane from 0.5 to 0.53 times; In the vapor state (gas) in the atmosphere with pressure equal to atmospheric pressure, gas is heavier than air: Butane 2.07 times; Propane 1.55 times. Therefore, the escaping LPG vapor will fly to the ground, accumulate in airtight places, low places, caves of warehouses, kitchens... Color: LPG in its pure state has no smell, but easily detectable by smell when there is a leak because LPG is mixed with the odorant Mercaptan in a certain ratio to have a characteristic smell. LPG causes severe burns on the skin when in direct contact, especially with LPG leaking directly into the skin if no protective equipment is available. The temperature of LPG when burning is very high from 1900oC ÷1950oC, capable of burning and melting most substances. LPG is a flammable fuel that, when combined with air, forms an explosive mixture. Reaching the limit of flammable concentration, under the effect of heat source or naked flame, it will catch fire and destroy equipment, facilities and works.