Does wet H2S damage occur in high temperature/pressure lines?
Does wet H2S damage occur in high temperature/pressure lines?
(OP)
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?





RE: Does wet H2S damage occur in high temperature/pressure lines?
You will also need to take note of the parameters under the second bullet point of pH regarding aqueous phases.
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Does wet H2S damage occur in high temperature/pressure lines?
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 mechanism.
I believe that 571 is a composite of different corrosion at different locations, but if the reactor operates at a high enough pressure to keep water below the boiling point, why is wet H2S not in that diagram prior to a water wash?
RE: Does wet H2S damage occur in high temperature/pressure lines?
Downstream of water washes obviously have tons of liquid water so that's why wet H2S corrosion starts there.
RE: Does wet H2S damage occur in high temperature/pressure lines?
Meanwhile the reactor effluent flow sides of fresh feed/reactor effluent exchangers (series) will be exposed to sulfidation due to high temperature (> 650F).
Thomas Eun
Corrosion and Materials Selection/Design Specialist
RE: Does wet H2S damage occur in high temperature/pressure lines?