When performing an analysis on a new relief valve installation, letting Caesar size the relief valve vent stack is fine. However; when analyzing existing installations, you are stuck with what you've got. In many cases, the size of the vent stack is hard piped directly to the valve outlet, and is the same size. Also, in some cases for hydrocarbons, installations have added reducer on the outlet to create more velocity to help with dispersion into the atmosphere.

When running the "Relief Load Synthesis" and the values for either the "Thermodynamic Entropy" or "Subsonic Vent Exit" are less than 1.0, the technical manual says that the "thrust values should be disregarded".

My question is: Besides the thrust values, are there any other calculated values, particularly the "Gas Conditions", in the printout that should be disregarded?