Inspectioneering
May/June 2005 Inspectioneering Journal
Date May/June 2005
Volume  11
Issue 3
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May/June 2005 Inspectioneering Journal Article Index


  • May/June 2005 Inspectioneering Journal
    By John Reynolds at Intertek

    Boiler feed water (BFW) corrosion is mostly the result of dissolved oxygen in the feedwater, but is also related to the quality of the BFW and the quality of the treatment system. If the treatment system is effective, then a layer of iron oxide (magnetite) will provide the protection needed to minimize boiler corrosion.

  • 99 Diseases of Pressure Equipment: Carbon Dioxide and Condensate Corrosion
    May/June 2005 Inspectioneering Journal
    By John Reynolds at Intertek

    Carbon dioxide (CO2) corrosion is most typically found in boiler condensate return systems that are not adequately treated with corrosion inhibitors (typically amines). Dissolved CO2 in condensate forms carbonic acid (H2CO3) which corrodes steels and low alloys to form a iron carbonate scale.

  • May/June 2005 Inspectioneering Journal
    By John Reynolds at Intertek

    Cooling water (CW) corrosion may be the oldest form of corrosion in the petrochemical industry, yet the industry still struggles with it for two primary reasons.

  • May/June 2005 Inspectioneering Journal
    By John Reynolds at Intertek

    Most all flue gases produced by the combustion of fuels contain contaminants that can condense into acid droplets. The amount of contaminants will determine the concentration of the acid droplets.

  • May/June 2005 Inspectioneering Journal
    By John Reynolds at Intertek

    MIC is caused by biological growth, i.e. organic slime (typically bacteria, algae, and fungi) in water under low flow or stagnant conditions. The industry experiences it in cooling water systems, piping, vessels and storage tank bottoms where the conditions are ripe for it.

  • Avoiding PWHT - Can It Be Justified?
    May/June 2005 Inspectioneering Journal
    By Julian Speck at TWI Ltd., and Amin Muhammed at TWI

    Current BSI and ASME codes for the construction of pressure vessels, boilers and piping specify that post-weld heat treatment is required if the thickness of the components being welded exceeds a specified value. This value depends on the type of material being used, and varies from code to code. An alternative procedure is available for deciding whether or not PWHT is necessary to avoid the risk of failure by fracture. This involves conducting a fracture mechanics assessment using procedures such as those in BSI 7910, or API 579. The use of these procedures is permitted in the British pressure vessel standard BS PD 5500:2003.

  • May/June 2005 Inspectioneering Journal
    By Bob Stakenborghs, P.E. at Evisive Inc.

    The figures included in this article provide visual evidence of the effectiveness of the microwave NDE technique. Note the clarity of the internal defects and structures of interest apparent in all of the scans.

  • May/June 2005 Inspectioneering Journal
    By Bob Stakenborghs, P.E. at Evisive Inc.

    API is preparing to release the next edition of API 579 Fitness-For-Service (FFS) the first quarter of 2006. The many major enhancements that have been made to the next edition of API 579 will permit Owner-Users to evaluate new types of damage including HIC/SOHIC and Dentgouge combinations, and allow detailed remaining life assessments of components operating in the creep range. In addition, new procedures for stress analysis have been developed that will enhance the usability and accuracy o f Level 3 Assessments resulting in longer running times for damaged components.

  • Vanta XRF Analyzer: Redefining PMI, Ruggedness, and Ease of Use
    Partner Content

    The Vanta handheld XRF is Olympus’ first full spectrum PMI analyzer that is IP65 rated and drop tested. The analyzer provides accurate, repeatable material chemistry and alloy grade matching in as little as 1–2 seconds. Operation is simple with an intuitive touch screen and swipe interface. Optional Wi-Fi, with the Olympus Scientific Cloud, provides seamless connectivity for efficient data and fleet management.


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