MSHA - Code of Federal Regulations - 30 CFR 56.4000
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MSHA - Title 30 CFR
30 CFR § 56.4000

The following definitions apply in this subpart.
Flash point. The minimum temperature at which sufficient vapor is released by a liquid to form a flammable vapor-air mixture near the surface of the liquid.

Safety can. A container of not over five gallons capacity that is designed to safely relieve internal pressure when exposed to heat and has a spring-closing lid and spout cover.