CEMP-E
TI 810-32
10 January 2002
Table 8-1. Pipe sizing guidelines for condensate return systems.
TWO-PIPE SYSTEM SIZING GUIDELINES
_____________________________________________________________________________
?? DETERMINE CONDENSATE LINE PRESSURE (AS OBSERVED FROM ON-SITE
PRESSURE GAGES).
?? DETERMINE CONDENSATE LOAD (lbm/hr) FROM CENTRAL PLANT LOGS AND OTHER
INPUT.
?? ASSUME CONDENSATE AT TRAP DISCHARGE IS A COMBINATION OF CONDENSATE
AND FLASH STEAM.
?? SIZE LINE TO ACCOMMODATE 5,000 ft/min STEAM AND CONDENSATE MIXTURE
VELOCITY AND TO ENSURE MIXTURE PRESSURE IS HIGH ENOUGH TO OVERCOME
LINE LOSSES.
THREE-PIPE SYSTEM SIZING GUIDELINES
____________________________________________________________________________________
GRAVITY LINE
??
SLOPE AT 1 inch/20 feet (MINIMUM) TOWARD RECEIVER.
??
TOTAL PRESSURE DROP LESS THAN 0.25 psi.
??
LINE SIZE WILL BE TWO (2) INCHES.
PUMPED LINE
SIZE PUMPS TO MOVE CONDENSATE TO THE CENTRAL PLANT AT THE REQUIRED
??
HEAD AT 200 deg. F.
8-10
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