Why should insulation oil flash point be closed? What is the significance of measuring flash point?
Flash point refers to the lowest temperature at which the oil is heated until its steam and air mix to a certain proportion, such as when the flame is close to the specified flame that flashes, accompanied by a short popping sound. It reflects how easily the oil catches fire and how much light fraction there is in the oil. The more light fraction there is in the oil, the lower the flash point. Flash point test has open cup method and closed cup method. Insulation oils used in power systems are mostly used in closed containers, so the test results of the closed cup method shall prevail. For new oils, a low flash point indicates that there is too much light fraction in the oil or that it is mixed with light fraction oil. For operating oil, flash point reduction is usually due to the breakdown of insulating oil into volatile, flammable low molecular hydrocarbons due to internal equipment failure.
Closing flash point: "Closing flash point the result measured by a specified closing flash point tester is called the closing flash point, expressed in ℃. Commonly used to determine kerosene, diesel oil, transformer oil, etc."
SH105B closed flash point automatic tester adopts microcomputer technology, large LCD display. The instrument according to the standard method of heating, automatic lifting, automatic ventilation, automatic ignition, automatic display, automatic locking flash point value, automatic printing results. After the test, it can be cooled automatically, and the working process is fully automated. It has the advantages of accurate measurement, good repeatability, stable performance and simple operation. Widely used in power, petroleum, chemical, commodity inspection, scientific research and other departments. Comply with ISO -- 2719,ASTM D93, Binsky - Martin closed cup method GB 5085.4-2007 GB261-2008