31
Jul
Pour Point Of Diesel. 2 diesel between -18F -28C and 20F -7C. Specifically it is a measure of the tendency of a fuel to become more viscous and resist flowing when cold. Pour point is measured as 5F above the temperature at which a fuel ceases to flow due to the formation of wax crystals that increase its viscosity. In order for the diesel to flow better again the gel point temperature should be brought back to the un-gel point which is around the temperature of the pour point.
1D 1 2D 2 and 4D 4. Because of the way diesel fuel jells a new system for rating winter diesel is being developed. Pour point is an important property for diesel and fuel oil blends. Therefore for a fuel that starts to cloud at -1C and that gels at -2C the cloud point would be reported as -1C and the pour point at 0C. Diesel fuel can have a very high level of jelling and still pass the pour point test. Pour Point Depressants are used for higher B-contents eg.
B100 pure biodiesel is also used in some engines but needs pour point and cloud point modifications.
The pour points are not realistic because the test does not take into account that fuel has to pass through a fuel filter. Pour point is measured as 5F above the temperature at which a fuel ceases to flow due to the formation of wax crystals that increase its viscosity. Before blending or when transporting or storing pure biodiesel. Pour point is an important property for diesel and fuel oil blends. The desired properties of these distillate fuels include controlled flash and pour points clean burning and no deposit formation in storage tanks. Thinking that your diesel fuel has a pour point 84 F you may try to start your diesel truck on a 12F day to no avail not knowing that your fuel tank has a gel and not a liquid that can be easily pumped to the combustion cylinder.