| Applies To | |
| Product(s): | AutoPIPE |
| Version(s): | ALL; |
| Area: | |
| Date Logged & Current Version | Jan 2023 12.08.04.009 |
Problem:
How does the note on AutoPIPE flange report affect the calculation of Flange stresses.
Example, Longitudinal Hub Stress, SH
Solution:
The calculation for Longitudinal Hub Stress, SH is dependent on all of the of following variables that are directly and indirectly related to equation XI -3240 Eq 6. (ASME BPVC III Appendix IX)
However the note which references the gasket seating condition stresses are calculated using Full available bolt load refers to using the Design gasket seating bolt load in the calculation instead of the Min operating or Min gasket loads reported:
The equation for Wg is directly controlled by the calculations of Am (total cross sectional area for design), Ab (total cross sectional are for gasket seating), and Sa (Bolt allowable stress at ambient temperature. Making any changes to the flange dimension or loads will be reflected in the value of Wg and ultimately the calculated stresses.
See Also
Q. How to calculate Bolt Tensile Stress from Flange Analysis output report in AutoPIPE?