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Title: New Development In Ultrasonic Joint Inspection For Polyethylene Systems
Author: Donald L. Badgerow
Source: American Gas Association 1983
Year Published: 1983
Abstract: Our Company has been using ultrasonic inspection of polyethylene pipe since the method was developed by Ervin Dziengielewski of Wisconsin Gas Company in 1969. This type of ultrasonic inspection has served us well with the exception of identifying what the industry refers to as a cold joint in butt fusion. A new method has been developed called the ultrasonic shadow technique which can detect a cold joint as well as other discontinuities by a simple go or no go test.

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