Scope:

ASTM E502 – 07 is of great significance as the flashpoint determines the response of the sample to heat and flame under controlled conditions. It is a significant property as it assesses the overall flammability hazard of a material. Flash point is also used in shipping and safety regulations to define flammable and combustible materials.

Procedure:

The specimen is positioned in a closed cup, and then it is heated in the Pensky-Martens Method at a controlled rate with stirring, and in the Tag Method, it is also heated at a controlled rate but without stirring. After that, in specific intervals, a flame is directed into the vapor space of each cup with continuous stirring to determine whether a flash occurs or not. It is then heated at a slower rate to maintain a small temperature differential between bath and specimen.

Specimen Detail:

Samples should not be stored in plastic bottles since volatile materials may diffuse through the walls of the bottle.

Result:

In this way, by performing ASTM E502 – 07 under controlled laboratory conditions, the flash point of chemicals is measured by the Closed Cup Method.