The Spirelf system is especially well adapted to use in crude oil units, where the main fouling layer is composed of ashphaltenes. In this application, the aim is primarily energy efficiency but also to improve maintenance management through extension of exchanger run times, which at the same time results in improved throughput capacity.

Other units that can be equipped by the Spirelf system are: desulphurization units, hydrotreaters, with the condition of liquid phase tube side of the exchangers. Applications on Naphtha, Kerosene, Gas Oil, and Light Crude Oil have been developed for several years with success.