hi dear friends

i have got some basic doubts in analysis pleas help me to find out the solution

1) this question might be blunder any way i need to clarify it

in caesar out put we can see forces acting in X,Y,Z Direction and moment about XYZ , for eg: my nozzle lies in X direction hence forces can act in Axial direction only ie (+X or -X ) The other forces(Y,Z) not directly acting on nozzle itz acting as a moment,so how does caesar out put showing this forces also in out put( IS this forces due to the Thermal growth of the equipment?)

Pleas clarify my doubts im waiting for your reply..



REgards
Arun

If I understand you correctly, you say that we can only have axial forces and moments on a tank nozzle, no other forces. It is true that API-650 only uses axial force and moments to check a nozzle, however, physically, it's not possible to have the moment without force.
The moment in the nozzle results from a force somewhere in the piping. See it as a cantilever beam with the fixed end at the tank nozzle and the free end on the piping side.
Placing a force (representing for example piping expansion) on the free end will result in both a bending moment and a force on the fixed end.

ya im agreeing with your statement, as u told there will not be a moment without force (Moment=force* Distance), but my question in caesar out put we will have forces as Fx Fy Fz and moment Mx My Mz ,if my nozzle lies in X direction obvsly i will have force Fx, but Fy and Fz are acting as moment(force along y and z direction not acting on the nozzle) but in my output showing there is a force force along y and z direction ie Fy and Fz ..how does this force is coming??

The forces and moments have nothing to do with the orientation of your nozzle. The attached piping system imparts forces and moments at the nozzle anchor due to gravity, wind, thermal expansion, etc. They can act in any direction, depending on the routing of your piping system. The XYZ axis system just gives us a frame work to represent the total force and moment by means of component vectors.

In orther words, your nozzle is just like a full anchor (X, Y, Z, RX, RY, RZ restraints).