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# how to do rectangular flange design?

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## how to do rectangular flange design?

(OP)
hi,

i had gone through the ASME code book to find the procedure for the bolted retangular flange design (integral type), but couldnt find it. please any one can help me as where i can find the procedure for this design. help needed quick!!.

thank you.

### RE: how to do rectangular flange design?

I don't have a copy of the code in front of me. Check out Section VIII Div 2 & 3, Alternative Rules.

Design the flange using Finite Element

### RE: how to do rectangular flange design?

(OP)
hi rich

I dont have those codes books. i checked in sec VIII Div 1 and couldnt find it. i will try to get hold of div 2 &3.
thank you for ur help.
bye

### RE: how to do rectangular flange design?

I suppose your flange doesn't need to be compliant with ASME VIII, as I think a rectangular flange wouldn't be allowed by that code.
If you only need a procedure for a calculation, I have no bibliographic suggestion. However you should know that a rectangular flange is intrinsically unable to resist pressure: for circular flanges the calculation is based on the behaviour of the so called circular rings under distributed moments, and a straight flange is unable to display such a behaviour.
As a consequence, the flange will rely on the wall behind to resist pressure, and either you will need a wall with the same thickness as the flange, or use reinforcement ribs.
This being said you can simply calculate a bending moment from the distance of bolt axes to midwall and check the flange and the wall in bending. It is a problem similar to that of baseplate flanges for columns of a steel structure.

prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

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