What are the key characteristics of fuel oil? The primary characteristics of fuel oil (mazut) are its viscosity and pour point. Viscosity defines the fluid’s flow characteristics, while the pour point indicates the temperature at which the fuel oil thickens, loses its mobility (fluidity), and solidifies. Depending on their viscosity, ...

What is meant by the flash point of fuel oil? The flash point is the temperature at which the vapors of fuel oil, when mixed with the surrounding air, ignite upon contact with an open flame. Fuel oil burned in the furnaces of steam boilers typically has a flash point ...