Due to the operation principle, Spirelf devices can be used in all
multitubular heat exchangers constructed with straight pipes, where
deposits within the pipes are found.
The Spirelf system applies to all fluid up to 360 degrees C - 680 degrees F,
in a liquid or partially vaporized phase, where flow velocities are
between 1 and 8 ft/s inclusive, circulating in pipes of an outside
diameter between 3/4 and 1 1/4 inch inclusive and of length between
10 and 33 ft inclusive.
The first applications were in the refinery industry, particularly in
atmospheric distillation preheat trains in which the fight against
fouling is crucial. But the Spirelf system can also be appied to
other industries.
Reboilers, especially in petrochemistry, constitute another field of
application. Thermosiphon type or forced flow type can be equipped
without trouble at the start-up and presence of Spirelf inserts leads
to a service time between cleanings of two or three times longer. The
system is more efficient when reboilers are in vertical position
and the ratio of vaporization is lower than 10%.
A limiting factor for the Spirelf system is the presence of large size
solid materials in the flow coming from the upstream side. One or two
millimeters particle size seems to be the limit.