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The fire point, or combustion point, of a fuel is the lowest temperature at which the liquid fuel will continue to burn for at least five seconds after ignition by an open flame of standard dimension.^[1] At the flash point, a lower temperature, a substance will ignite briefly, but vapour might not be produced at a rate to sustain the fire. Most tables of material properties will only list material flash points. In general, the fire point can be assumed to be about 10 °C higher than the flash point,^[2] although this is no substitute for testing if the fire point is safety critical.^[2]

Testing of the fire point is done by open cup apparatus.^[2]^[3]

Notes

^ Steven A., Treese; Peter R., Pujado; David S. J., Jones (2015). Handbook of Petroleum Processing (2 ed.). Springer. p. 1736. ISBN 978-3-319-14528-0.
^ ^a ^b ^c "Flash Point and Fire Point". Archived from the original on 2010-12-14. Retrieved 2010-05-27.
^ "Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester", ASTM.org

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