Flange pressure conating OF API standared FEA

[engmohamedibnali]

How can i made FEA to the flange which is pressurized and bolted

ok i tried to make the following

Load constraint : Pressure

Boundary constraint : Fixed at the bolt hole

but i think its not right

so can any one help me

 

[goeasyon]

As long as your model settings match the real physics, then it is reasonable. The boundary conditions in your description sound good for me, is the flange pre-stressed?

https://welsim.com

 

[engmohamedibnali]

Thanks goeasyon for your reply

i miss understand what do you mean (pre stressed)

but i can say that the flange after we fabricate it we do a pressure test using water on it and bolt the two outlet with a blind flange

so the only load inside is the pressure of water which can reach 10000 psi

when i calculated the result is reasonable , its not reach 0.8 yield strength of the material

 

[Mustaine3]

I think it's not reasonable. The holes usually don't touch the bolts, so the flange can expand. This would not be possible, when you constraint the bolt holes.

How about using a quarter model and having two symmetry boundary conditions. Then you only need an axial constraint.

 

[SAG8]

engmohamedibnali you can go through below link, they have nicely explained the flange analysis.

https://pveng.com/flange-fea-post/