I need someone to help check my model!

HI! i need someone to have a quick look through my model and the settings I used cause i'm not sure if im doing it right. You can download the inp file of my model at the link below. So basically my model is an engine vessel which is made up of stainless steel. What I need to find out is the stresses throughout the vessel with uniform pressure acting in it.  Im also getting relatively high stresses at certain point which im not sure why. Please have a look at my model and see if I have made any mistakes. Thank you so much!

!inp file link: https://www.dropbox.com/s/qdbqe4v3mgedsw4/Job-1.inp