July/August 1998 Inspectioneering Journal
Date July/August 1998
Volume  4
Issue 4
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July/August 1998 Inspectioneering Journal Article Index

  • July/August 1998 Inspectioneering Journal

    The debate about advantages and drawbacks of the application of the TOFD (time of flight diffraction) approach for ultrasonic weld inspection should not forget the original reasons for its introduction in the 1960s. The major advantage at that time had been the better crack detection in comparison to x-ray techniques, especially in view of an increased use of steels and welding technologies with a the presence of diverse cracking phenomena (e.g. cold cracking, transverse cracks etc.).

  • Pendulum Effect No. 3
    July/August 1998 Inspectioneering Journal
    By Del Underwood at Det Norske Veritas

    In a past issue, we discussed one solution to the instrument line block valve pendulum problem. This was where the valve assembly can be mounted remotely from the vibrating product line, such as at-grade. This issue covers two possibilities where the valves need to remain close to the vibrating line.

  • July/August 1998 Inspectioneering Journal
    By Constance Reichert at Edison Welding Institute

    Visual inspection is the most common nondestructive testing method. For critical applications, machine vision technology provides advantages over visual inspection.

  • July/August 1998 Inspectioneering Journal
    By Roy Schuyler at DuPont DeNemours, Inc.

    Regulatory, civic and competitive pressures require we change to a proactive, rather than a reactive culture or environment with a supportive infrastructure. The concurrent evolution of cultural and infrastructural change relies upon effective leadership, communication and commitment (both philosophically and financially) to create an environment which not only promotes but supports/facilitates (no mixed signals) “healthy” progress, that can be measured.

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