ASTM D92: Flash OR Fire Point, Cleveland Open Cup

ASTM D92 Flash and Fire Points by Cleveland Open Cup Tester

The flash point is the lowest temperature at which a substance will generate vapors that when exposed to a flame will momentarily ignite and quickly self-extinguish. The fire point is the lowest temperature at which a substance will generate vapors sufficiently dense enough to ignite and sustain burning for at least 5 seconds. In lubricants these values are important for shipping regulations and as an indicator of the safe operating ranges. This test determines the flash point and fire point of petroleum products. It is intended for substances with flash points between 79°C and 400°C.

The sample is placed in the test cup, slowly heated and periodically exposed to a flame. The flash point is recorded and the sample is further heated and periodically exposed to the flame until the fire point is observed. The temperatures are corrected for barometric pressure and reported in °C. Please let us know the anticipated flash or fire point, when available.

Related tests offered by Petro-Lubricant Testing Laboratories:

If only the flash point is of interest consider:

ASTM D56 for low viscosity substances (below 5.5cSt) with anticipated flash points below 93^oC

ASTM D93 for high viscosity substances, petroleum based liquids that form surface films, or liquids with flash points from 40°C to 370°C

If both the flash point and the fire point are of interest consider:

ASTM D1310 for flash points below 79°C, high viscosity samples or samples that tend to form surface films

ASTM D92 for low viscosity substances with flash points between 79°C and 400°C.

For the flammability of aerosols consider ASTM D3065.

For the autoignition point consider ASTM E659 or ASTM D2155.