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Ultrasonic Testing of Bolts and Pins: Longitudinal Beam Review

Often, the initial reaction when someone hears the term “ultrasonic inspection” is: “Ultrasonic inspections are voodoo and witchcraft. I don’t care what your magic box says; show me something I can believe in like an X-ray film or a red line from a liquid penetrant testing indication.” How many times have you heard or even said that? The goal of this article is to share what I have learned over the years about ultrasonic longitudinal beam inspections for flaw detection on anchor bolts, shafts, bridge pins, and header bolts, which is different than thickness gaging or looking for laminations in a base metal.

  • ASTM, ASTM E 587: Standard Practice for Ultrasonic Angle-beam Contact Testing, ASTM International, West Conshohocken, Pennsylvania, 2010
  • AWS, AWS D1.1: Structural Welding Code – Steel, American Welding Society, Miami, Florida, 2010.
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