Provided are some general guidelines for the modeling of a PSV/Flare for a piping system.

  • The general practice is to model the PSV/Flare effect as a force acting on the system.  A conservative approach when performing a static analysis is to double the value of the dynamic force, to take into account any dynamic load factor.  
  • Depending on the direction / design of the PSV / Flare, the direction that the force is modeled needs to be taken into account.  When modeling the dynamic effect as a force for static analysis, your goal is for the final displacement of the flare to react as you would expect the moment the flare activates.  Some modeling practices for the flare load are shown here: 
  • When it comes to load case design for the flare, utilize the occasional load case synthesis shown in page 578 of the user's guide.
  • More information about flare modeling in CAESAR II can be downloaded here: