> Propane has a much higher risk factor than gasoline due to it being a > vapor > at ambient temps and its extremely wide flammability range. That is why > propane is restricted on almost all tunnels and some bridges.
FWIW, gasoline is generally identically restricted WRT tunnels and bridges. For example the Chesepeake Bay bridge-tunnel limits their transport to 120gal for gasoline, 120lbs (141gal) for LPG. Not trying to downplay the danger of propane; on the contrary I think people need to understand how dangerous gasoline can be. Propane builds up to hazardous concentrations faster, but consequently it also dissipates faster. Gasoline is unlikely to achieve an explosive mixture at normal temperatures, but consequently it sits around as a fire hazard of comparable danger until cleaned up. When either vents/spills onto a hot engine, BOTH will be in gaseous form-- and gasoline the more volatile with an autoignition temperature of 536degF to propane's 874degF. -- John Bange '90 Vanagon - "Geldsauger" |
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