Hi, can any one help me. I am trying to work on a ellipsoidal closure(with o-ring as sealing element) without flange but has bolts for securing with the shell(this to is w/o flange). I am not able to finalize design formulas.

I have not the slightest idea how this closure is looking like, maybe it can be considered a noncircular Appendix 2 flange, otherwise I would go to U-2(g) and use other methods, BS, EN, FEM, etc.

Maybe you got a picure?

DK

Sir, sorry, I am not able to paste a picture.
You may have seen a ellipsoidal (2:1)dish end, it is same but I don't want to weld it to shell. Instead I want to have a bolting between shell & it, so that I may open it around a hinge joint.
And to avoid leakage, I will be placing a O-ring at the mating surface of dish-end & shell.

I have already tried two options:

1) I have designed a ellipsoidal head using APV software. But it is assumed that it will be welded to shell and I don't want to have a welding joint. I need a re-openable joint (bolting). Since Flanges are to bulky & will more time for opening, I was planning to have ellip. closure but just with bolts. Is there any s/c in Code that allows me to use bolts instead of welding?

2) Here, as mentioned by you, I have assumed it has Integral Flange (sketch 5, fig:2.4) per App.2. In it I have assumed a flg as a part of head, with flg O.D. less than Bolt Circle Dia. And as I don't want to have a extended surface of flg, I nearly had adjusted my flg O.D equal to head O.D.

So, are this per code. I will try if I can upload the sketch.

www.rmenergy.com/pdfs/yalequickopen.pdf

I'm not sure of the design rules, but it sounds like you want to buy a premade swing-bolt closure, or camlock bolt closure. Paste the above link into your browser and view the product line, page 9 may be of intereste, not sure of the limitations on size. I have used this company and product before, there may be a similar supplier closer to your region.

Please refer to the closure with swing bolt in the following link. I am referring to same. Why do we need the hub portion, can't the ellip. dish be directly bolted to shell?
www.rmenergy.com/pdfs/yalequickopen.pdf

See Div.1 ,A-6 of the Code.

Best
pastyl

Refer UG-35 of ASME Sec VIII Div-1