In one of our project we got HAZOP recommendation to install PSV. Can any one suggest the solution so that applicability of this PSV can be checked.
My system is as follows:
I am getting process fluid from one pump which is having shut off pressure of 34 barg. This fluid is pass through cold box, get vaporizes and then sent to one of vessel. now on the outlet of cold box, one control valve is present. If this control valve is failed closed, then vaporization of liquid will start building a pressure. However, cold box is designed for 37.8 barg and safety valve set pressure is also same. so during blocked outlet scenario, does heat from cold box will raise the pressure upto the PSV set pressure?