Hi to all,

Im doing stress analysis for the 8" PTFE (Poly Tetra Fluoro Ethylene) lined Carbon steel Pipe using CAESAR 4.5. As a part of Client requirement the Pipe is to be insulated by thermal cellular glass. The insulation thickness for the pipe is 1” and the same is being entered in the CAESAR input data. And now im unable to provide the lining thickness (3mm) for the pipe as I observed from Caesar Documentation “If a negative value is entered for the insulation thickness, the program will model refractory lined pipe”. Kindly advise me whether to consider lining thickness for doing stress analysis. Does it have an impact on thermal expansion of piping?
Incase lining to be taken into account clarify me on the consideration of both lining and insulation thickness on the input.
Kindly suggest on the above clarification which will be greatly helpful for me.

Best Regards
Deepak.S