Device for the ultrasonic non-destructive testing of tubes

Details Device for the ultrasonic non-destructive testing of tubes Device for the ultrasonic non-destructive testing of tubes

1988-12-09

1991-11-05

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73628, 73640, 73641, G01N 2906, G01N 2926

Patent

active

050623001

ABSTRACT:
A ultrasonic device for non-destructive testing of thin tubes, for instance heat exchanger tubes, comprises a head having a longitudinal axis and insertable into a tube. A mechanism imparts to the head a rectilinear motion along and a rotational motion about the axis. The head contains ultrasonic transducers coupled with the tube through a fluid and able to transmit an ultrasonic beam in the form of volume waves in a direction at an angle with the longitudinal axis and to detect echoes. The transducers include one (or more) ultrasonic transducer delivering a focussed beam directed in a plane containing the longitudinal axis and at an angle with a direction perpendicular to the longitudinal axis, and one (or more) second ultrasonic transducer delivering a focussed beam parallel to a line perpendicular to the longitudinal axis and located at a distance from the line. Circumferential as well as longitudinal flaws may consequently be detected.

REFERENCES:
patent: 3810384 (1974-05-01), Evans
patent: 3990300 (1976-11-01), Kossoff
patent: 4008603 (1977-02-01), Paulissen
patent: 4361044 (1982-11-01), Kupperman et al.
patent: 4388831 (1983-06-01), Sherman
patent: 4412315 (1983-10-01), Flournoy
patent: 4437332 (1984-03-01), Pittaro
patent: 4460920 (1984-07-01), Weber et al.
patent: 4856337 (1989-08-01), Metala et al.

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