For an earlier executed project for pipe stress analysis of 5 stage centrifugal compressor,
We have some queries raised by our end client. We would like to get them sorted out and
also increase our understanding about correct modelling techniques in CAESAR.


1.)We have modeled the inter stage coolers (Heat Exchangers) as a pipe element filled with water. Is this procedure correct. If yes / no can you please explain.

Also in standard EPC practice heat exchangers are modeled as weightless rigid elements. Is there a specific
reason for the same?

2.)Our client has commented us to model the Heat Exchanger as a rigid element with weights assigned to those rigid elements. Is this procedure correct. Please provide explanation.

3.)The Heat Exchangers are supported using spring hanger support instead of using saddles. Also we do not have any input data for spring hangers. For such situations how can we select
a correct spring and provide inputs to get correct spring designed for the system.