ASTM E502 – 07 Method for Selection and Use of ASTM Standards for the Determination of Flash Point of Chemicals by Closed Cup Methods
ASTM E502-07 explains the determination of the flashpoint of liquid and solid chemical compounds. It describes the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions.
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.
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