Frequently asked questions
- This is because these gases liquefy under moderate pressure, and they readily vaporize upon release of pressure. At normal temperatures and pressures, LPG will evaporate. Because of this, LPG is stored in steel tanks. In order to allow for thermal expansion of the liquid gas, these tanks are filled between 80% and 85% of their capacity. The ratio between the volumes of the vaporized gas and the liquefied gas varies depending on composition, pressure and temperature, but is typically around 250:1. LPG is heavier than air, and thus will flow along floors and tend to settle in low spots, such as basements. This can cause ignition or suffocation hazards if not dealt with.