Why does the calculated allowable = 29802 psi for "ASME ND (2007) PRE-VERIFICATION STRESS REPORT", Eq 8, Load case = GR, not match the hand calculated value of 30000 psi
Note: hand calculated value = 1.5 x Sh = 1.5 x 20000 psi (from Press/Temp/PipeID tab of the input grid) = 30000 psi.
Open the model.
As stated in the online help under the following section:
Help > Contents> Contents Tab> Reference Information> Code Compliance Calculations> ASME BPV-III-1-ND (1972 - 2007)> Design Condition
Also stated per code section ND-3652: Consideration of Design Conditions:
Now find the indicated node point (ex. 130) on the "Design Press / Temp" Tab of the input grids, as shown below:
Sh = 19868 psi.
Allowable = 1.5 x Sh = 1.5 x 19868 psi = 29802 psi (Matches Output report above)
Note: there is no link between these 2 tabs ("Press/Temp/PipeID" and "Design Press/Temp"). The data on both tabs must be manually entered or modified. Example, when creating a new model:
a. General model options
b. Segment start data with pipe property Id name
c. Pipe properties data for the new PipeID
d. Operation Pressure & Temp Data
e. A screen automatically appears asking the user to enter in the Design Press & Temp information.
Or this data can be modified later with 2 different methods:
1. On the "Design Press/Temp" tab of the input grids
2. Modify> Design Pressure & Temperature menu command.
ASME BPV-III-1-ND, AutoPIPE Nuclear Piping Code FAQ