IP 34: Determination of flash point — Pensky-Martens closed cup method

Overview:

This International Standard describes three procedures, A, B and C, using the Pensky-Martens closed cup tester, for determining the flash point of  combustible  liquids, liquids with suspended solids, liquids that tend to form a surface film under the test conditions, biodiesel and other liquids in the temperature range of 40 °C to 370 °C.

CAUTION — For certain mixtures no flash point, as defined, is observed; instead a significant enlargement of the test flame (not halo effect) and a change in colour of the test flame from blue to yellowish-orange can occur. Continued heating can result in significant burning of vapours outside the test cup, and can be a potential fire hazard.