FT-C Vertical Electric Thermal Fluid Heater Manual 12 2013 ISSUE 1
a) After the appropriate system tests have been satisfactorily completed, all hot pipework,
including manifolds on the heater, must be adequately insulated with material suited to the
temperature and application to prevent both heat loss and personnel injury.
b) The deaerator section of the combination tank must be insulated. The expansion section of
the combination tank must not be insulated, nor should the thermal buffer section.
c) On units operated with inert gas blankets above the uid in the expansion tank, the entire
combination tank, including the expansion and thermal buffer sections, may be insulated, but
is not necessary.
d) It is recommended that for inspection and maintenance, pumps, anges, valves, and ttings
be left un-insulated but suitably shielded for safety.
e) Hot oil pipe insulation should be a minimum of 50 mm thick, high temperature, laminated,
foamglass cellular glass insulation as manufactured by Pittsburgh Corning Corporation, or
equal.
a) Plant engineers must be familiar with the nature of potential hazards when working with
thermal uids at operating temperatures.
b) Unlike steam or high-pressure water systems, thermal uid attains extremely high
temperatures without a corresponding increase in pressure. While this lack of high pressure
in the system yields many advantages, a false sense of security should not be allowed to
develop on account of this alone.
c) Certain types of thermal uid may have operating temperatures reaching 345°C and above,
so all exposed pipework is hazardous and should be insulated, as indicated in the preceding
sections.
d) Flanged joints must be checked for tightness during and after the rst warming up of the
system. After these checks, exposed hot anges, pumps, valves and ttings should be tted
with some sort of shield.
e) It is important to remember that there is pressure generated in the system by the circulating
pump. Great care should be exercised when opening any drain or vent valves in the system.
This is especially important during commissioning, when any air trapped in the system is
vented at high points, and when water, which will ash into steam, is either expelled from the
combination tank vent or drained off at low points.
f) If a re does occur, extinguish using CO
2
, foam or dry chemical.
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