Especially now with the advent of B31J becoming mandatory in the 2020 B31.3 code, the COINCIDENT pressure and temperature pairs should be run in CII. Recently the trend has been to use DESIGN pressure for all runs to save time with the logic being that the NOMINAL SUS stress should be conservative or higher than the operating case. Also a good practice that we have using for a long time is to include a WNC and/or WNC+H to see what is happening in the INSTALLED case prior to startup; Structural also uses these types of loads to check OCC overturning.

In thinner wall piping systems the SUS deflections will be affected by the internal pressure, but even if the effect is insignificant in many cases the latest good practice is to attempt to get the REAL ANSWERS using reasonable time frames and resources.

With FEAtools, PCL-Gold, and reality, the BEND sifs and flex VARY with pressure and ALSO with layout of close fittings (ELLs, flanges, etc).

For future work an attempt will be made to model actual loading scenarios along with the "conservative" DESIGN checks if justified.

Just take a bit more care to describe the cases and care with the input so the poor checkers life will just be a formality.