"Flue Gas Corrosion"

Question:

"I am looking form corrosion CS Pipes ASTM A106 Gr B Hot flue gases from Gas turbine generator Exhaust temperature ranging from 300 to 400 degree centigrade is used to heat-up Hotoil system which is circulated through the pipe coil inside the exhaust.The flue gases has high Co2 around 50 to 60% and So2. "

Answer:

I would not recommend using A106 carbon steel pipe for your stated application due to the potential for sulfurous acid corrosion at dew point conditions when the unit was shut down.

 

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