it appears to me that CII miscalculates the equivalent pressure in Flange analysis module sometimes; I have tried to input the same conditions of a flange in the calculation, once by entering the equivalent pressure instead of the design pressure and another time by entering the design pressure, axial force and bending moment. the results are not even close to each other! not to mention that the one with only the equivalent pressure entered, is more disastrous. my flange is 3"WN#150

Open a Support Request on eCustomer and send in your files and calculations. We'll get to the bottom of the issue.

You can find the explanation of the differences in a paper written by Ray. You can find it in eCustomer and the title is:

"CAESAR II_External Forces and Moments imposed on a Bolted Flange"

Regards,

Dan,

Hope you're doing good...


How to get to this ecustomer? I don't find it on Coade webpage.

Thank you SJ, I am in Mexico for two weeks. I hope you're fine as well.

It is on Intergraph.

https://crmweb.intergraph.com/

or, https://support.intergraph.com/ that will lead you to the same page

Regards,

Yes, as danb said you cannot equivalent pressure as the design pressure. The equivalent pressure is only applied to hydrostatic end load pulling on the flange.

Refer to the document written by Ray.

Dan,

Thanks for the link but unfortunately this link works only for US citizen , which I'm not.

Can you please download & attach it here?

Hope you're enjoying your spicy hot Tortilla!!


Enjoy!!!

Please ask Ray.

I can't have access these days.

Keep Smiling SJ......

And......someone to contact B31.1 comittee...

because in para. II-4.2.3 Analysis of Flange they say


(B.1) PFD should be used in the ASME Section VIII,
Division 1 equations instead of the design pressure.