Dear all experts


I would like to know is there any guide to make material selection or any chart with corrsion table?


Currently, I am handling a STHE AES type R, for oil and gas offshore application
tube with crude oil inlet temperature 20C, outlet temperature 60C, flow rate 157558 kg/hr, pressure 4 kg/cm2g
Shell with hot oil inlet temperature 250C, out let temperature 150C, flow rate 94444 kg/hr , pressure 4.4-8 kg/cm2g

Process fluid content of Chloride (11360ppm), water, H2S (3800ppm), CO2 (0.36%)


any guide to select material for this situation?


Regards
Ethan

Suggest to take advise of metallurgist for the material selction instead of looking for some guide lines. Any guide line is based on some standard conditions and to be verified with actual operatine conditions.

In general Hot oil is a non corrosive fluid and CS may be used for the same. Considering presence of Chloride and high hot oil temperature SS may not be suitable for process/ crude oil side.

CS may also not be suitable due to high corrosion rates with H2S/ CO2 and Cl present in process media.

DSS may be a better choice for the material in contact with the process media.

Regards

ethanhan:

The material of Construction is typically explicitly stated in the Process data sheet and the same has to be followed especially in your case as the ew\quipment is upstream and exposed to harsh/corrosive environments.

Alternatrly, as sanjeev as rightly pointed out seek the advise of a metallurgist. I had read sometimes back in some NiDI document which gave the advantages of Nickel as MOC in upstream applications due to its strong corrosion resistance in that environment. Obviously not he most economic solution compared to NACE compliant MOC or DSS.

reg,
jehan