Temperature cycles describe cyclic effects on the piping. Each cycle is characterized by:
variable stress amplitude (caused by temperature difference ΔT_{i})
repetition frequency (number of cycles) N_{Ci} at given time interval τ_{i}
It is assumed that amplitude changes proportionally to temperature difference relative to the cycle with the largest difference.
To add cycle properties, click "Add"; to delete, click "Delete". To edit the correlation of the current cycle's difference to the maximum cycle's difference or frequency (number of cycle with the current temperature during set interval), double click the desired field. Then, press Tab or click on a free space in the dialog window. To change the period, select the corresponding cell and click on the symbol that appears in the right corner. Select the desired cycle from the list.
Cycle number i |
Span |
Temperature Factor |
Number of cycles in the space of 25 years |
---|---|---|---|
1 |
every year |
130 |
25 |
2 |
every month |
65 |
600 |
3 |
every week |
32.5 |
5200 |
4 |
every day |
16.25 |
73000 |
Property |
Description |
Maximum temperature, Т_{max} |
Maximum design temperature among all elements |
Temperature factor, k_{i} |
Correlation of current cycle's maximum temperature difference to maximum temperature difference k_{i} = ΔT_{i} / (Т_{max} - Т_{installation}) Т_{installation} - Ambient temperature Т_{max} - design temperature from pipe properties ΔT_{i} - temperature difference ΔT_{i} = (Т_{max} - Т_{installation}) ∙ k_{i} |
File > Temperature Cycles