| Applies To | |||
| Product: | AutoPIPE | ||
| First Affected Version: | 9.4 | ||
| Found in Version: | 11.03.00.08 | ||
| Fixed and Released in Version: | 11.04.00.xx | ||
| Area: | All | ||
| Severity: | High | ||
| Backlog Issue Number: | 889026 |
Problem Description
Program was using incorrect formula of Am2 in gasket seating bolt load (code required) calculation for flanges subjected to external pressure.
Gasket seating bolt load (Code required) for flanges subjected to external pressure = W= (Am2+Ab)*Sa/2
Where:
Am2 = Wm2/Sa (Div 1 section 2-3)
Program was incorrectly calculating Am2 = Wm2/Sb
Sa = allowable bolt stress at atmospheric temperature
Sb = allowable bolt stress at design temperature
This issue affects ASME section VIII Div1, Div2 and Appendix XI
Avoidance
None
Solution
Program should use allowable bolt stress at atmospheric temperature (Sa) in Am2 calculations for calculating gasket seating bolt load (code required) for flanges subjected to external pressure
See Also
Critical issues released in version