Thank you for your reply, but I am still trying to understand what is going on.
In the process flow diagrams in API 571 Section 5.2, Figure 5-48 shows that sulfidation is a damage mechanism after the reactor (dry H2S damage in my mind), and after a water wash, that wet H2S is a damage...
API 571 says that wet H2S damage occurs from ambient to 300F. My example is an HOC reactor effluent line at 1655 PSI and 424F going to a High Pressure Hot Seperator. Will wet H2S be a concern at this high of a temperature since the pressure will keep the water in the liquid phase?