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What is the difference between the flash point and the ignition point of transformer oil?

The flash point is the lowest temperature at which a vapor generated by a flammable liquid or solid surface is flashed under the action of a test flame in a stable air environment.

A flash point is the lowest temperature at which a flammable liquid or solid can emit a sufficient amount of vapor and form a combustible mixture with air at the liquid or solid surface within the container used. The flash point of a flammable liquid varies with its concentration.

The flash point, also called the flash point, refers to the temperature at which the mixture of steam and air on the surface of the flammable liquid comes into contact with the fire for the first time. The flash point of various oils can be determined by standard instruments. The vapor volatilized vapor forms a mixture with air and the lowest temperature at which the source of ignition can flash is determined by the closed cup method. The flash point temperature is lower than the ignition temperature. From a fire point of view, the liquid flash point is the lowest temperature that can cause a fire. The lower the flash point, the greater the risk of fire.

The ignition point is also called the fire point. It refers to the temperature at which the mixture of steam and air on the surface of the flammable liquid contacts the fire and the flame can continue to burn for not less than 5 s. It can be measured in the same standard instrument after measuring the flash point. The flash point and flash point of a flammable liquid indicate the likelihood of an explosion or fire, and is highly relevant to the safety of transportation, storage, and use.

The flash point refers to the lowest temperature at which a petroleum product is heated to the point where it flashes in contact with the flame under specified conditions. The lighter the oil, the lower the flash point. The hazard rating of the oil is based on the flash point. From the flash point, the weight of the oil composition can be judged to identify the risk of fire in the oil. The flash point measured by the closed flash point tester is called the closed flash point and is generally used to measure light oil. The higher the flash point, the safer it is. The flash point is a project that indicates the propensity to evaporate and the safety properties of petroleum products. The hazard level of the oil is divided according to the flash point, the flash point is below 45 °C called flammable products; above 45 °C is flammable. It is forbidden to heat the oil to its flash point during storage and use. The maximum temperature of heating should be lower than the flashing temperature of 20~30 °C. Flash point is also important in the use of oil. For example, when the flash point of the transformer oil in use is significantly reduced, the transformer oil has been diluted by the fuel, and the transformer should be repaired and replaced.

Under the specified conditions, the transformer oil is heated. When the oil temperature reaches a certain temperature, the mixture of the vapor of the transformer oil and the surrounding air will flash when it comes into contact with the flame. The lowest flash temperature is called transformer oil. Flash point. When using transformer oil, the flash point of the transformer oil should be considered according to the use temperature. The general flash point should be 20 to 30 degrees higher than the use temperature to ensure safe use and reduce volatilization loss.

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