Method and apparatus for ultrasonic flaw detection of T-welded p

Details Method and apparatus for ultrasonic flaw detection of T-welded p Method and apparatus for ultrasonic flaw detection of T-welded p

1982-12-10

1984-11-06

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73614, 73615, G01N 2904

Patent

active

044804741

ABSTRACT:
Herein disclosed is a method for ultrasonic flaw detection of T-welded portion of steel product. The method comprises: maintaining the flange portion horizontally, making convergent ultrasonic beams incident on the flange portion vertically to the top face of the flange portion through a medium, scanning the incident beams transversely of the welded portion, detecting ultrasonic echo from a depth corresponding to the bottom face thickness of the flange portion, and comparing the level of said ultrasonic echo with a predetermined threshold value. Disclosed also is an apparatus for carry out the above method. These method and apparatus are suited particularly to the on-line flaw detection of the welded shape steel.

REFERENCES:
patent: 2949028 (1960-08-01), Joy
patent: 4137776 (1979-02-01), Rudis et al.

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