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One of these tower which has a high trays corrosion rate and had a suggestion to be replaced with 3xx grade is a Debutanizer. This corrosion occur mainly due to existence of chlorine (and sulfur) in natural gas liquid (electrolyte). I thought NGLs has a lower conductivity than sea water but I...

I am a QA/QC engineer in a refinery company but I am not a corrosion specialist. I have a puzzling point about the material used in building some of our towers which were constructed by Chiyoda Corp. The Towers shell and internal rings are made of carbon steel (I can not remember the exact JIS...