I am starting to investigate the usability of simulation to structurally evaluate high pressure/temperature piping runs with SolidWorks Premium Simulation.

Specific question at this point is how to fixture the end of a pipe/flange that provides for no translation or rotation of the end face while allowing for radial expansion due to temperature and pressure. I see how I could totally fix the end using "fixed" but I am confused as how the "on cylindrical face" can be used to achieve the desired result of fixing only the end face of the pipe or flange in this case.