Asphaltenes are high molecular weight aromatic, cyclic-chained molecules naturally occuring in all crudes. A few crudes contain excessive amounts of asphaltenes that can precipitate out as the produced crude cools while passing through the production flowlines, piping and equipment. Asphaltenes are typically more dense than other crude components, such as parafins and form gums or sticky solids. Asphaltene accumulations are removed with solvents. Parafin accumulations can be removed with heat, however, excessive heat will cause asphaltenes to consolidate further. Some producers insulate long flowlines to retard the precipitation of asphaltenes by slowing down the cooling rate.