Applies To Product(s): AutoPIPE Version(s): ALL; Area: Report Date Logged & Current Version Jan 2020 12.02.00.14 Problem: What does the column headings for ASME NC/ND Stress Summary with Reversing dynamic loads actually mean in AutoPIPE's output report? “Sustain Stress due to Weight” "P+WGT+Rev.Dyn Stress” “Sam Bending Stress” “Sam Axial Stress” Solution: Please see the following AutoPIPE help section: Help ribbon> Contents button> Contents Tab> Reference Information> Code Compliance Calculations> - ASME BPV-III-1-NC (1972 - 2017) - Level C Service Limits - NC - Level C - Including Reversing Dynamic Loads This help location provides details about each of these columns: “Sustain Stress due to Weight” see "a) Sustain Stress Equation NC 3655 (2)" "P+WGT+Rev.Dyn Stress” see "b) Stress Due to Sustain, Pressure and Reversing Dynmic effects Equation NC 3655 (3)" “Sam Bending Stress” or “Sam Axial Stress” see "Range of resultant moments and magnitude of longitudinal force NC-3655 (4) Questions 1. Does Column 1, “Sustain Stress due to Weight” include any Pressure effects? Answer: No, as shown per the equation in AutoPIPE Help section above, there are no pressure effects. 2. Why would the second column value of "P+WGT+Rev.Dyn Stress" = zero, considering the first column with Sustained Weight stress alone is 1961 psi? Answer: "P+WGT+Rev.Dyn Stress" is reporting zero as the stress summary may not be properly set up. Once this column in stress summary is populated with a reversing dynamic load case / combination, "P+WGT+Rev.Dyn Stress" reports values that actually include both Gravity and Reversing dynamic moments. This image above reporting zero in "P+WGT+Rev.Dyn Stress" and “SAM Bending and Axial Stress” columns definitely needs to be updated with a better example. 3. Why Is the P (Pressure) indicated in the second column heading "Peak Pressure" or "Design Pressure"? Answer: That is the Design Pressure. See Also "Stress Summary" sub-report using Results> Output Report Bentley AutoPIPE
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