What Is the Pour Point?

Pour point refers to the lowest temperature at which the cooled sample can flow under the specified test conditions; pour point refers to the maximum temperature when the oil level of the cooled sample no longer moves under the specified test conditions , All expressed in ° C.

Pour point

Pour point is used to measure lubricants, etc.

Fuel oil has a technical index called pour point ^[1] , the unit is ° C. Generally speaking, the so-called pour point of fuel oil refers to the lowest temperature at which it can flow.

We all know that as the temperature of fuel oil decreases, its fluidity will become worse and worse, and even when it reaches a certain temperature, it will solidify and lose its fluidity. Generally speaking, the fluidity of fuel oil at low temperatures has two factors: the viscosity of one fuel oil increases with temperature; the other is that paraffin wax that was originally liquid in fuel oil will solidify when the temperature drops to a certain level Appears in crystalline form. So the pour point we usually say is sometimes called "wax pour point". According to the definition description, we can see that the higher the pour point, the worse the fluidity of the fuel oil at natural temperature. We can also improve the pour point of fuel oil by adding an appropriate amount of pour point depressant in practice. Since many fuel oils need to be transported long distances to reach their destination, the pour point is also a very important technical indicator.