Inspectioneering
July/August 2004 Inspectioneering Journal
Date July/August 2004
Volume  10
Issue 4
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July/August 2004 Inspectioneering Journal Article Index


  • July/August 2004 Inspectioneering Journal
    By John Reynolds at Intertek

    Though oxidation and sulfidation are quite prevalent high temperature corrosion mechanisms in many of our process units, we now come to a few that are not very common, but still deserve some attention to make sure they don’t lead to unexpected failures.

  • 99 Diseases of Pressure Equipment: Catastrophic Oxidation (Fuel Ash Corrosion)
    July/August 2004 Inspectioneering Journal

    Catastrophic oxidation can occur when certain contaminants are present in a high temperature environment, i.e. inside furnace fireboxes, in our industry. Those contaminants are typically vanadium pentoxide with sulfur oxide or sodium sulfate.

  • July/August 2004 Inspectioneering Journal
    By John Reynolds at Intertek

    Decarburization is the antithesis of carburization and rarely results in equipment failure. However, surface decarburization is often a sign that something more serious is going on, ie high temperature hydrogen attack (HTHA), which is well covered in API RP 941, Steels for Hydrogen Service at Elevated Temperatures and Pressures in Petroleum Refineries and Petrochemical Plants.

  • Conventional, Digital and Computer Radiography
    Partner Content

    ProSource Radiography Services, a sister company and subsidiary of Pro-Surve is ready to tackle your radiography needs. Should you need a small bore piping survey or other need for computed radiography. ProSource can take conventional film, and convert them to digital files for easy naming and storage. ProSource is ready to be your Sole-Point-Of-Contact (SPOC) for your radiography needs.

  • July/August 2004 Inspectioneering Journal
    By John Reynolds at Intertek

    High temperature oxidation is not a real common type of failure in our industry, but it can and does happen when temperatures exceed design maximums. All metals oxidize, even at room temperature, and in many cases that slow oxidation process actually protects the metal from rapid oxidation.

  • July/August 2004 Inspectioneering Journal
    By John Reynolds at Intertek

    High temperature sulfidation is probably the most common high temperature corrosion nemesis in the refining industry, since there are very few “sweet” refineries still in operation. Sulfidation corrosion typically is of concern in sour oil services starting at temperatures in the 500F (260C) range.

  • July/August 2004 Inspectioneering Journal
    By John Reynolds at Intertek

    Metal dusting is simply a severe form or extension of carburization in which the extensive carbides that form as a result of carburization lead to grains of metal falling out of the tube or piping and being swept away by the process stream.

  • July/August 2004 Inspectioneering Journal
    By Greg Alvarado at Inspectioneering Journal

    The "low hanging fruit" has been harvested in most places. Now comes the challenge of gathering the most bountiful harvest, that which is amongst the leaves and branches, without harming the tree. This will require practical expertise. This will require computational models that narrow the scatter band and are more accurate that are asking the right questions (which requires practical knowledge, technical knowledge and experience = expertise). In this editorial, I will point out some of the pitfalls I see in the inspection and reliability arenas and present some insight and solutions that will help "IJ" readers stay on track and emerge more successful as a result.

  • 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.


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