In some cases, 2-ø Flow™ changes the user-specified pipe length (and possibly elevation, for inclined pipes). Why?
If the available pressure drop is not enough to force the specified flow rate through the specified length of pipe, 2-ø Flow™ resets the pipe length to a small value and continues the calculations. This is done to try to obtain some useful information about pressure drop per unit length for the specifed flow rate. In these cases, the “Calculation Results” report sets the Warning level to “High” and prints a message. The “Line Summary” report prints the length used in the calculations. The “Calculation Messages” report also gives messages. Please check your results carefully. The typical solution for this situation in rating calculations is to specify a larger diameter pipe or a smaller flow rate.
