ANSI Check Effective flange pressure equals Poperating plus Peq. For a number of load cases the Popertating appears to be missing:
Example:
In this scenario, the model is made to use 2 thermal / pressure cases to help guide the user. Pressure 1 is 300 psi and pressure 2 is 200 psi.
Notice Gravity and Statiic Seismic load cases do not appear to add P1 or P2 operating pressure in Press. Actual column.
The ANSI Flange check in AutoPIPE calculates equivalent pressure based on the loads defined by the user. Flexibility is provided in these calculations through the means of the ‘combinations’ dialog, which enables users to combine different loads depending on their need.
AutoPIPE's example model Walkthu was configured to use 2 thermal / pressure cases to help guide the user.
P1 = 300 psi, T1 = 300 deg F
P2 = 200 psi, T2 = 200 deg F
As can be seen, ‘Gravity{1}’ and ‘Static Seismic 1{1}’ do not incorporate the operating pressure in their respective ‘Press. Actual’ columns. Since the program is not given information regarding which pressure case to use for these loads, AutoPIPE prints out the combined loads ‘GRTP1 + E1’ and ‘GRTP2 + E1’ to account for both pressure cases. The ‘Gravity{1}’ and ‘Static Seismic 1{1}’ loads are still printed to show their contribution in the combined ‘GRTP1 + E1’ combination.
If required, users can select the pressure case they want to associate with such loads by adding them in the combinations dialog as shown below:
Steps:
AutoPIPE facilitates its users by providing them with the ability to create models that fit their respective needs. It is up to the user to utilize the features provided in the program to meet their requirements.
Important, as mentioned in your official AutoPIPE training class, only consider the operating condition results (ex. GRT1P1) when evaluating your design. If you are interested to know what contributes to these total results, only then look should one look at the individual load cases.
"Flange Analysis" sub report
Bentley AutoPIPE