Bolt design for noncircular shaped flange with circular bore

[Elb.ab]

Hello everyone,
I m working on a project where I need to validate the bolts for a flanged connection (pixture attached).
My calculation wasn't validated as I have contact both inside and outside the bolt circle and I was asked to take into account the reaction force (HR) resulting from that contact.

Do you have any idea how I can calculate this force?
I know that ASME APPENDIX Y is only for circular, bolted flanged connections.


Thank you

 

[r6155]

See UG-34.
Regards

 

[SnTMan]

Elb.ab, treat is as round, under Apx Y if you must. See Apx 2-10.

Regards,

MIke

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Elb.ab]

Hello,
Thank you for your help.

If I m getting it right UG-34 is used to determine the minimum thickness.

hen I use Apx 2-10 I get a diameter A smaller than C (cf. Picture). Does this make sense?

 

[SnTMan]

Elb.ab first, if you are going to calculate thickness per UG-34 there is no need to perform Apx 2 calculations. You will have to confirm bolt area and account for the opening. See UG-39

Second, your flange OD "A" looks correct. Under Apx 2 C larger than A presents no computational problems, but I don't know if this is true under Apx Y,

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Elb.ab]

Thank you again for your answer.

I see, I don't know if it makes sense under appendix Y.

The purpose of my calculation is to determine the forces on the bolts and for this I was asked to add the reaction force HR