Rail Bolt Hole Inspection

Inspection of bolt holes in rail is a common application that detects cracking caused by expansion and vibration. These cracks originate from the bolt hole and can spread out, this causes the rail ends to eventually come apart. The most commonly used method for this inspection is conventional ultrasound, the inspector must use a variety of transducers and a different offset point for each hole.

This application note highlights the use of phased array ultrasonics to reliably perform the bolt hole inspection in a more time efficient manner.

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