What are Sources of Ignition?
Ignition sources are usually expressed as the minimum temperature needed for a mixture of propane and oxygen to ignite. Ignition temperature of propane is approximately 920°F. That may seem high, but compared to a common sulfur match, it isn’t… ignition temperature of a sulfur match is as high as 3,000°F A common ignition source for propane is another flame, such as the flame of a pilot, match or electronic igniter. There are others. Many develop enough heat to ignite a combustible mixture of propane and oxygen, including sparks from electric connections, including switches; engines; vehicle exhaust; a lit cigarette; even the static electricity generated by a nylon jacket. That is why sources of ignition are not permitted around a propane installation. It’s also why our Midwest Propane Uniform Program does not permit clothing made of 100% nylon or polyester.
