What is the difference between open closed flash point tester

Measurement of petroleum products are divided into KaiKouBei method and the closed method, mainly depends on the nature of the oil products and conditions of use.

closed method usually used for evaporative larger more light oil products, such as solvent oil, kerosene, because of the determination conditions similar to actual storage and use of light oil, can be used as the basis for fire safety index.

KaiKouBei method used in lubricating oil and heavy oil products. Because when KaiKouBei method, petroleum products after heat steam into the surrounding air diffusion, which is formed by the measured flash point is on the high side. For most of the lubricating oil and heavy oil, especially in the sealed parts or temperature is not high under the conditions of use, even with a small amount of light blending material, will evaporate in the process of use, not constitute a risk of fire or explosion, so this kind of products all adopt KaiKouBei method.

in some oil specification, rules are open and closed two kinds of quality indicators, its purpose is to open, closed flash point values, the difference between the degree of size to check the oil fractions and the presence of mixed in lightweight components. Some lubricating oil used in an airtight container, in use process commonly used in a variety of reasons, Such as high speed equipment overheating or other reasons, an electrical current circuit, arc, etc. ) And produce high temperature, lubricating oil is likely to produce decomposition, or from seeping into other parts of lightweight components. These ingredients in an airtight container after evaporation and mixed with air, there is a risk of fire explosion. But when KaiKouBei method, may not be able to find the existence of this kind of easy evaporation of lightweight components, so the regulation to closed method is used to test, kerosene as solvent. It is all in order to meet the conditions of use, makes the flash point of the measured and when using the similar situation.