The input data required to perform the internal corrosion mechanism review typically includes:

• Product chemistry

• O2 content

• CO2 content

• H2S content

• H2O content

• Flow rate

• Details of routine cleaning pigging performed (i.e., frequency, type of cleaning tool used, description of debris removed, etc.)

• Inlet and outlet pressures

• Operating temperatures at inlet and outlet

• Corrosion inhibitor program details

• Biocide program details

The mechanism review would establish the theoretical hotspots and conduct corrosion growth rate. The estimation of carbon steel corrosion rates in CO2 and H2S dominated systems. This could then be compared and contrasted to the results of any corrosion growth assessment performed on the basis of ILI data.

On the basis of this review, recommendations for internal corrosion management would then be suggested.