Swing Bolt from standard flanges

[Mr.blu]

Hello everyone

Is there a guide to addapt the standard flanges to add swing bolts?
I want to know if i can use standard flanges and modified them to uso the swing bolts.

Thank you in Advance

 

[LittleInch]

See this previous post

https://www.eng-tips.com/viewthread.cfm?qid=456022

Basically if you cut holes in a standard B 16.5 flange then it's no longer a "standard component" and you need to requalify it.

Note that often the ASME VIII calcs show lower max pressure than the standard B 16.5 flange.

https://www.eng-tips.com/viewthread.cfm?qid=304933

But lots of people make and supply these and they come with documentation showing the max working pressure etc.
Especially PV manufacturers, filter manufacturers and similar.

Why not just buy one?

But if not what sort of pressure and size are we talking here?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Mr.blu]

Thank you for tour reply.
I am traying to leaen how to design them so i can make that part of the vessel. I am having trouble finding information about this. I thought that there was some kind o guide or Excel sheet to design them

 

[LittleInch]

It's all in ASME VIII see the linked posts.

It is not an Excel sheet design issue.

If you get it wrong your flange flies off.

What pressure and size are we talking about?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Mr.blu]

Than you for your reply.
Is for a 12 in diameter filter for a design pressure of 3 kg/cm2. SS304L

 

[LittleInch]

Think about it for a minute - that's over two tonnes of force on those bolts...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Mr.blu]

I never said i did not know that. That's why i am looking for help in this issue.
Thank you for your help.

 

[LittleInch]

Good to know - BTW where did you get your original drawing from?

I think the blind flange would flex too much to seal well. A single O ring seal on a filter doesn't seem like a great idea either.

But for this sort of pressure and force, what advantage do you get vs standard studs and nuts and a normal flange? I can see it when you can have wing nuts and similar fast removal nuts, but not for a filter under pressure. IMHO.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.