Tank Settlement Stress
Tank Settlement Stress
(OP)
I'm about to do stress analysis on some piping connecting to a new API 650 tank. I am planning on modeling the piping in Caesar II or Auto Pipe, and making the face of the flange of the nozzle a displaced anchor to account for settlement. I'm thinking there should be hot and cold installed cases (based on predicted settlement after staged loading) and hot and cold displaced cases (based on future estimated displacement). I will then take the restraint loads at the face of the nozzle flange for each of these cases and feed them to Nozzle Pro. Am I missing anything?





RE: Tank Settlement Stress
Yes you are missing something. You need to consder not only the settlement displacements but also the "bulging" of the tank wall by including the nozzle stiffnesses (Radial and Longitudinal rotational) and the radial and rotational displacement of the nozzle.
RE: Tank Settlement Stress
RE: Tank Settlement Stress
Once you get the nozzle loads from the CAESAR II analysis, you can qualify the nozzle using FE/Pipe or by manually drawing the figures from Appendix P.2.
Richard Ay
COADE, Inc.