Studded Flange
Studded Flange
(OP)
Hello,
On the Bottom of ASME 2:1 Elliptical Head, I have to design a 12.6" ODX 8.66" ID X 0.7" thk Studded flange with 8 x7/16" dia. whole holes ( none threded hole)in order to install a Europpeen Agitator.
The tank is designed as per ASME Section VIII div.1.
I'm using Compress Programe for the design calculation, but with this programe, unfortunatly I can't calculate this flange, I try also to see on the Appendix 2, but there is no studded flange Formulas on this Appendix.
I think that I have no other choise to do a FEA ( Finite element analysis)as a calculations for the Authorised Inspector.
Could some one give me other issues for this case.
Thanks.
Laurent.
On the Bottom of ASME 2:1 Elliptical Head, I have to design a 12.6" ODX 8.66" ID X 0.7" thk Studded flange with 8 x7/16" dia. whole holes ( none threded hole)in order to install a Europpeen Agitator.
The tank is designed as per ASME Section VIII div.1.
I'm using Compress Programe for the design calculation, but with this programe, unfortunatly I can't calculate this flange, I try also to see on the Appendix 2, but there is no studded flange Formulas on this Appendix.
I think that I have no other choise to do a FEA ( Finite element analysis)as a calculations for the Authorised Inspector.
Could some one give me other issues for this case.
Thanks.
Laurent.





RE: Studded Flange
to get reinforcement calcs, just put it in as a hollow forging.
The flange itself, i have no idea.
If there is no pressure, why stamp it?
RE: Studded Flange
Is this a flange as shown in Appendix 2, any of the various figures? Is it a studding outlet as shown in Fig UW-16.3? Something else altogether?
BTW, I don't believe Appendix 2 takes any account of the presence or absence of bolt holes, therefore I think it could be used to design a flange with tapped holes, blind or not, or through holes either one.
Regards,
Mike
RE: Studded Flange
Please find attched sketch to see the studded flange.
RE: Studded Flange
see attached file.
Thanks.
Laurent.
RE: Studded Flange
should be long enough to get the bolts in from the bottom (as drawing) between head and flange. You will have to ask how long it is.
the neck for reinforcement will have to be done as a hollow forging. get dimensions from manufacturer.
the flange facing/bolts will have to be done by appendix 2 or by manufacturer.
RE: Studded Flange
Second, design opening in the head per UG-37, treating the flange material not including the bolt holes as reinforcement.
You will need extra material not considered in the first step to consider as available for reinforcement, see UG-40(e).
This would be a "quick and dirty", but conservative way to go about it.
Regards,
Mike
RE: Studded Flange
In the ones we have used the lip hasn't changed the flange rating as there are numerous weld details allowed for installation by Code.
You will find the Studding Outlet in the ASME Codes without the Insert lip.
http://www.forgedcomponents.com/
Good luck with bottom entering mixer.