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Fuel oil specification

Fuel oil specification

The main technical indexes of fuel oil are density, viscosity, pour point, flash point, sulfur, impurities, residual carbon, viscosity, sulfur content,flash point, water, ash and mechanical impurities.

1. viscosity: viscosity is the most important performance index of fuel oil, and is the main basis for dividing fuel oil grade. It is a measure of the flow impedance, and its size represents the fluidity, pumpability and atomization of fuel oil.

2. sulfur content: sulfur content is also an important manifestation of the quality of fuel oil. Excessive sulphur content in fuel oil can cause corrosion of metal equipment and environmental pollution.

3. density: the ratio of the mass (Mass) to the volume of the oil. As volume changes with temperature, density can not exist independently of temperature. The smaller the density, the more components of light oil in fuel oil, the higher the calorific value. Fuel oil quality standard, the smaller the density, the better.

4. flash point: it refers to the use of safety indicators. Low flash point can cause fire hazards, and it is an index of oil safety. The lower the flash point is, the safer it is.

5. Moisture: The existence of water will affect the solidification point of fuel oil, with the increase of water content, the solidification point of fuel oil gradually increased. In addition, moisture will also affect the combustion performance of fuel machinery, may cause furnace flameout, shutdown and other accidents.

6. Ash: Ash is the remaining non-combustible part after combustion, especially after the catalytic cracking cycle oil and slurry infiltration into the fuel oil, silicon aluminum catalyst powder will make the pump, valve wear accelerated. In addition, ash will also be covered on the heating surface of the boiler, resulting in deterioration of heat transfer. ,

7. mechanical impurities: insoluble precipitates or suspended solids in fuel oil. Mechanical impurities will block the filter screen, causing the wear of the oil pump and the blockage of the nozzle, which will affect the normal combustion.

8. residual carbon: residue formed after evaporation and pyrolysis of fuel oil. The residual carbon in fuel oil indicates that fuel oil is easy to oxidize to produce colloid or carbon.

9. calorific value: the heat released from the combustion of fuel oil of unit weight. The level of heat generated by fuel oil is the main index to evaluate the quality of fuel oil.

10. Pour Point and Point of Solidification: Point is the lowest temperature at which a sample of oil can flow under specified experimental conditions. Freezing point refers to the maximum temperature of the cooled oil sample when the oil surface is no longer moving. The pour point of the same oil is slightly higher than that of the solidifying point.