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248 ST 3000 Release 300 and SFC Model STS103 User’s Manual 6/08
B.1 Possible Solutions/Methods, Continued
Steam heating,
continued
Figure B-9 Piping Installation for Process Pressure Transmitter and Impulse Piping with
Steam Heating.
1/4" OD steam tracer line
Impulse piping with
1/4" thick insulation
Pipe insulated with
waterproof outer cover
Pipe strap about
every 15"
Detail of Transmitter Impulse Piping
Condensate return from steam trap. All steam and
condensate lines must always slope downward at least 1"
per foot to prevent low spots which will trap condensate.
All condensate lines must be protected from freezing.
Steam trap or
condensate
temperature
valvle
Insulated enclosure
Shut-off valve
Steam Supply (low pressure)
Union or coupling
Process pressure
transmitter
Shut-off valve
Shut-off valve
Steam heat
tracer line
Superheated steam
considerations
We must remember that the temperature of steam is 212°F (100°C) only at
the normal atmospheric pressure of about 14.7 pounds per square inch
absolute (psia). If the pressure of steam is increased above 14.7 psia, the
temperature of the steam is also increased. For example, if we have steam
at 30 pounds per square inch gage (psig), the steam temperature is 274°F
(134°C).
Continued on next page