Problem No. 15: Pressure safety valve experiences

Pressure safety valves are critical equipment items in any chemical process plant. In a urea plant, there are additional challenges such as carbamate corrosion and crystallisation risks. These challenges threaten the reliable operation of the pressure safety valves: popping up too early and/or crystallisation of process media in the inlet or outlet lines. Furthermore, these challenges make it very difficult to install spare pressure safety valves, as is common practice in other chemical processes. Sufficient reasons, therefore, to initiate a discussion about experiences with pressure safety valves (PSV) in urea plants.