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What is the maximum percentage of propane vapor in the atmosphere that can ignite?

6%

9.6%

The maximum percentage of propane vapor in the atmosphere that can ignite is 9.6%. This value is derived from the lower explosive limit (LEL) for propane, which is the concentration below which the propane-air mixture is too lean to burn. When the concentration of propane vapor is between its LEL and upper explosive limit (UEL), which is around 9.6% to 10.9% for propane, ignition can occur if there is an appropriate ignition source. Understanding this threshold is crucial for RV technicians as it helps in ensuring safe handling and storage of propane in recreational vehicles, thereby preventing potentially dangerous situations. Proper safety protocols should always be followed to maintain concentrations of propane vapor well below the LEL.

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12%

18%

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