skid edge allowable load
skid edge allowable load
(OP)
Can any one put some light on it. How to input forces and moments in CAESAR II and what else to be considered in the analysis.
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RE: skid edge allowable load
Moreover, you also need to edit load cases, by adding "F1".
For example:
L1 W+T1+P1 (OPE)
L2 W+P1 (SUS)
L3 W+T1+P1+F1 (OPE+FORCE)
L4 L3-L1 (PURE FORCE)
L5 L4+L2 (OCC) - Select "Scalar" drop-down menu, in load case editor)
L3 and L4 are just helping cases, you need to check stresses/compliance at L5 case only.
RE: skid edge allowable load
RE: skid edge allowable load
RE: skid edge allowable load
RE: skid edge allowable load
If you have some defined force on the pipe at the edge of the skid, ensure there's a node at that location and apply external force/moment. You need to consider what is causing the force. If it's occasional due to equipment loads or something, then it is an OCC load. If it's something in the skid that is 100% always applying load and not dependent on temperature, I would consider adding it (F1) to the sustained case.
So both L1 and L2 in sjkji's example above would now contain F1 and L3-l5 would go away.
RE: skid edge allowable load
RE: skid edge allowable load
The EPC is giving you the ALLOWABLE loads on the flanged skid connections. What you need to do is analyze the piping at these connections and ensure the configuration is such that the allowable loads of these connections is not exceeded.
The EPC is not saying these are constant loads that are always present in the system; they are saying the forces applied to the skid cannot exceed those values. This is common for equipment connections where exceeding those forces could result in damaging the equipment.
In other words, there are no applied/external forces being put on the piping here; you need to make sure the piping is not putting forces greater than the given allowable loads at those connections.
RE: skid edge allowable load
RE: skid edge allowable load
If he's worried about your pipe support just outside the skid, you can apply the external force vector, with the same magnitude as the allowable loads provided, at those connections to make sure the support loads are still adequate. If so, the initial load case example provided still applies.
But seriously, ask him what he's talking about. The skid piping connection can handle x (loads given to you). The piping outside the skid being analyzed by you will result in y (loads determined by Caesar). As long as y < x and your supports can handle y, everything is fine.
RE: skid edge allowable load