i'm newbie in caesar,and i dont know how to modelling a relief valve (PZV) . Anybody help me please?

Model it as a rigid, or rigids. Just get the weight and length right. Take a look at the RELIEF example job to see how this can be done.

Thanks, but PZV has vertical length (input) 105 mm and horizontal (output) 140 mm ,how we model it? and would u please help me to modelling reducer with offset?

You don't need to do that, CAESAR II doesn't analyze rigid elements. They are used only for stiffness and weight, so:

110-120 DY=105 Rigid=Yes Weight= 1/2 valve weight
120-130 DX=140 Rigid=Yes Weight= 1/2 valve weight

Look at the "example job" I referred to above.

Yes, You can look at Caesar Application Guide Document or use the Search Button.....
is this a home work from your Training Course (Ap-Greid)?
good luck than....

hi richard ay
i have one doubt. i going to analysis for psv lines. shall i consider only downstream(outlet) only or both(upstream and downstream).As per
API-520, calculate force and apply for it.Give valuable suggestion for me.In downstream shall i give anchor support.
how i give support for psv lines.Any standard procedure is thier. our client said provied anchor support in downstream.shall i considerd or not.

That really depends on your project scope and the exact system you have. However, my guess is "both".


Yes, you need to apply the thrust (relief) force to your model. This is an input item for CAESAR II. If you can't compute this, ask your process people.


Well at some point you will hit a terminal point (some type of nozzel), since your pipe goes "some place". Terminal points are either anchors or predefined displacements. As to whether or not you have other intermediate anchors, that is "system specific".


Depending on the Code, you need to determine where to place supports for the "primary" and "secondary" loading condtions, as well as addressing any specific operating events (such as the valve firing).

thanks richard ay....

Thanks A Lot Richard Ay