Variant of reverse flange design

[mechengineer]

Hi dear PV experts,

Due to the small channel ID of 465 mm, we need to use a variation of the reverse flange design. Can ASME VIII-1, Appendix 2-13 for Reverse Flanges be applied to this variant?
If anyone has experience designing this type of reverse flange variation, I would appreciate your insights. I believe this variant may be more effective than Fig. 2-13.1, as it appears to experience less internal pressure bending.

Thanks.

 

[SnTMan]

Well, I don't believe you can fairly call this a "reverse flange". It is more a variation on a Sketch 2-4 intergral flange to my eye.

Design of a similar desigh was discussed in this post https://www.eng-tips.com/threads/as...ell-boundary-permissible.524846/#post-9039665

Why not just design a flange that fits clearly within the Rules? Why make life hard on yourself?

 

[r6155]

(OP)
You are very confused.

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[mechengineer]

@SnTMan ,

My requst is in beteewn reverse flange and studding flange to minimize the flange size and weight. FPSO project, it is very critical space limit. I will try to go to studding flange if there is not calculation reference for my request. It is not possible to install the removable partition plate if using the reverse flange (flange ID is too small).