Understanding Heat Exchanger Reading 02

15. Shell and Tube Mean Metal Temperatures are the average metal
temperatures through the shell and tube thicknesses integrated over the
length of the heat exchanger for a given steady state operating condition.
16. Shut-Down Conditions are the conditions of operation which exist from
the time of steady state operating conditions to the time that flow of both
process streams has ceased.
17. Start-Up Conditions are the conditions of operation which exist from the
time that flow of either or both process streams is initiated to the time that
steady state operating conditions are achieved.
18. Support plate is a device to support the bundle or to reduce unsupported
tube span without consideration for heat transfer.
19. Tubesheet Ligament is the shortest distance between edge of adjacent
tube holes in the tube pattern.
20. Welded Tube Joint is a tube-to-tubesheet joint where the tube is welded
to the tubesheet.
Charlie Chong/ Fion Zhang