Calculation of stress at pipe orifice
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Help! Help! Help! How should the stresses on the nozzles and flanges on pressure vessels be calculated? How should standard API661 be interpreted? I’m seeking help from all the experts! ! !
Select the appropriate pressure class based on the design pressure and design temperature; no separate calculation is required.
First of all, thank you for your reply. Perhaps I didn’t express myself clearly; I need to calculate the forces acting on the component in order to determine the wall thickness of the pipe as well as the strength of the welds! Also, there is a clause in our technical agreement stating that the design of the nozzle openings should be calculated based on twice the standards of API661. How should this be understood?
I haven’t seen API661; it’s available for download at http://www.asimi8.com/thread-16912-1-1.html.
The selection of the flange class should be determined by the piping discipline; the equipment discipline, on the other hand, must ensure that the local stresses in the equipment and fittings under external loads at the pipe ends meet the required standards. If the owner has no special requirements, using WRC107 or WRC297 will suffice.
You might want to check CSCBPV-TD001-2013 to see if it helps