Crude Distillation Unit—Distillation Tower Overhead System Corrosion

This report is intended as a technical resource for materials and corrosion specialists, process engineers, and operators at oil refining companies; chemical-treatment suppliers; and other companies involved in analyzing and preventing CDU distillation tower overhead corrosion.

Revision of this document was warranted to incorporate new learnings via both experimentation and practical work experience within the refining industry. During the revision of this report, NACE Task Group (TG) 342 conducted a survey in 2017-2019 to collect general industry practice data on several topics covered in this report. The results were published in a separate CORROSION conference paper and are also referenced in relevant sections of this report.¹ Appendix A also summarizes key results from the survey.