Suction and Line Heaters
R.W. Holland’s line and suction heaters are used in heating heavy viscous fluids (ex. #6 fuel oil, heavy crude, etc.). Suction Heaters heat the fluids directly from the tank to temperatures suitable for pumping. Line heaters, mounted in line, heat the fluids to processing or burner temperatures. Steam is generally the heating medium, however, hot water, hot oils or heat transfer fluids can also be used.
R.W. Holland’s line and suction heaters are fabricated in accordance with the A.S.M.E. unfired pressure vessel code and T.E.M.A. standards. Tubesheets are fully studded allowing the removal of the channel for tube inspection without disturbing the shell side closure. This eliminates the need to drain tanks in the case of suction heaters or piping in the case of line heaters.
Both heaters obtain high efficiency as they utilize the R.W. Holland Petrofin Fintube. This is a longitudinal fintube with the fins resistance welded to the tube. Several different tube and fin configurations are utilized to obtain the most economical selection for a specific application. The use of fintubes keeps the metal temperature lower resulting in less fouling and therefore extending the period between shut downs for cleaning.
PRESSURE - TEMPERATURE RATING
Standard Ratings are 150 psig at 500°F for both the shell and tubeside of line heaters and the tubeside of suction heaters. The shellside of the suction heater is not pressure rated since there is no pressure in the storage tank. Normally the inlet end of a suction heater is not flanged, preventing the hydrostatic testing of the shellside. Both line and suction heaters can be designed for higher pressures to meet specific applications.