For computing the allowable tube compression, the values of k and SL are required. Where,
SL = Unsupported Span of the tube
k = Tube end condition corresponding to the span SL. The table below lists the values of k.
|
k |
Condition |
|---|---|
|
0.60 |
For unsupported spans between two tubesheets. |
|
0.80 |
For unsupported spans between a tubesheet and a tube support. |
|
1.0 |
For unsupported spans between two tube supports. |
For the worst case scenario, enter the values of k and SL that give the maximum combination of k * SL. SL for example, could be the distance between the tubesheet and the first baffle or the tube span between two support baffles.