Propane has no smell- Colorless, odorless, and tasteless. Odorant is added Propane as a liquid- Boiling point at -44° F. To stay as a liquid, it needs to be stored under pressure. Propane is lighter than water Propane as vapor- Propane vapor is 1/2 times heavier than air. It settles into low- lying areas. When released into the air it expands 270 times it's original volume Miscellaneous- Liquid propane expands 17 times more than water with temperature changes. Propane vapor is heavier than air, but propane liquid is lighter than water. Achieves stability in tanks. Propane in Action PROPANE DISTRIBUTION U.S. Natural Gas Processing U.S Petroleum Refineries Canadian Imports Other Imports (Delivery) Transport Rail Pipeline Primary & Secondary Storage Underground Storage Over 250 Domestic & International Sources of Propane Above Ground Storage Propane Distribution Residential Commercial/ Industrial