Hi,

I have modelled a DN200 (8"), Sch-120 (18.26mm) line, material to A106C, having 12.5% mill tolerance and 0.75mm CA for 187 barg @361ºC. Piping code is B31.1

Why does Caesar give a warning that the computed wall thickness is greater than the entered thickness ?

If I manually calculate the min wall, using same allowable as used by Caesar (129.947 MPa), I get a min wall thickness of 17.8935mm. This is also confirmed by the fact that if I run the analysis (ignoring the warning), Caesar reports a max hoop stress of ~93% only.

Must be missing something elemenatry - can anybody point out please?

regards,