Dear all,

Is it mandatory to take the fluid density(water) in each & every pipe line analysis in CAESAR-II or the software will consider it automatically ? Because practically for testing purpose or to verify the leakages in between piping joints normally we fill the pipe line by water.

Kindly suggest anybody ASAP.


Thanks & Regards
Gyana

Pls reply somebody.

Specify the fluid density on the 1st element of the model and CAESAR II will apply it to all following elements (until you change it).

Yes it is mandatory. Why because, while taking restraint summary you need to take the maximum load for desiging restraints. So in some times during the hydro test your load will become more. For calculating hydro load the water density is necessary.

I think you clear my poing.

In general, yes. However, you need to be careful in the case of large vapor lines. These will not normally have a liquid load in operation and a hydrotest may impose loads on the structure and equipment that could be impractical for the civil/structural engineers to support. The project may opt to pneumatically test in these cases.

At my company, we design for full water loads on all lines up to 24" diamter. Above that, liquid lines are still designed always for full load. Vapor service lines are discussed with the project team to assess the impact.

And, there's always a but - if you have springs in your system, you need to make sure the operating case you design them to uses the actual SG of the fluid. It doesn't affect smaller lines too much, but 6"+ you really don't want to size a spring that is supporting a vapor lines based on the liquid full condition. It will end up pulling up way too hard.