hi,everybody!
i know the caesar can use some setting to analysis the FRP piping system.
can we use the same method but seting different material parameters to analysis the other non metal piping system , such as PVC ect?

Analyzing a thermoplastic piping system is not very straightforward using software like CAESAR II. First of all you have a material with different long and short term properties. Secondly, you have a very high coefficient of thermal expansion. Especially on long lines the calculated displacement and thus stresses will be incorrect.
You better analyse the system using different methods. Start checking pressure and span with simple formulas and use vendor specifications for thermal effects.
Also do a search on this forum on thermoplastic and you will find more info related to this kind of analysis.