Inspectioneering

Dana G. Williams: About the Author
Marathon Ashland Petroleum LLC

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Published Articles

July/August 2004 Inspectioneering Journal
By Jonathan D. Dobis at The Equity Engineering Group, Inc., Dana G. Williams at Marathon Ashland Petroleum LLC, and David L. Bryan, Jr. at Marathon Ashland Petroleum LLC

The following is the final part of a 2 part series. Part 1 covered the following considerations that are critical in establishing effective reliability and inspection programs for these complex units: - HF Alkylation Process Description - An extensive explanation of how HF alky unit process conditions affect corrosion for the various sections of these types of units. The abstract, introduction, explanation of terms, references, figures and a typical unit PFD are reiterated in part 2 as reference materials.

May/June 2004 Inspectioneering Journal
By Jonathan D. Dobis at The Equity Engineering Group, Inc., Dana G. Williams at Marathon Ashland Petroleum LLC, and David L. Bryan, Jr. at Marathon Ashland Petroleum LLC

Corrosion and fouling in HF Alkylation Units are closely linked to feed quality and operating conditions. This paper outlines the relationship between key operating parameters and corrosion that has been used to develop a set of guidelines to define an operating envelope. These guidelines have been used to benchmark operating units and to help maintenance and inspection groups understand how corrosion is directly affected by operating parameters. An example where this methodology has been used to troubleshoot operating problems is included. A web-based data collection system has been used as a tool to build a database of actual operating conditions found in the unit, and the corresponding problems or damage observed.


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