Method and apparatus for locating material defects in hollow bod

Details Method and apparatus for locating material defects in hollow bod Method and apparatus for locating material defects in hollow bod

1983-06-14

1984-06-12

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73623, G01N 2904

Patent

active

044534108

ABSTRACT:
An ultrasonic probe is positioned within a hollow body such as a pipe for detecting possible flaws in the body wall. The probe is designed for rotational and longitudinal movement in said pipe and includes an ultrasonic transmitter/receiver mounted eccentrically within a liquid filled chamber of the probe, so that transmitted impulses strike the inner wall of the pipe at such an angle that the angle of refraction of the sound wave in the material of the wall is always less than 90.degree..

REFERENCES:
patent: 3121324 (1964-02-01), Cowan
patent: 3417609 (1968-12-01), Graham
patent: 3583211 (1971-06-01), Brech et al.
patent: 3916675 (1975-11-01), Perdijon
patent: 4174636 (1979-11-01), Pagano
patent: 4269066 (1981-05-01), Fischer
patent: 4388831 (1983-06-01), Sherman
"Testing Tube Welds from the Bore", Ultrasonics, pp. 208-210, Oct.-Dec. 1964.
J. Krautkramer et al., Ultrasonic Testing of Materials, pp. 456, 647, 648, Second Edition, 1977.
M. Robba et al., "Controlli Non Distruttivi di Fabricazion . . . ", Metallurgia Italiana, pp. 293-307, No. 4, 1968.
V. T. Pronyakin et al., "Ultrasonic Flaw Detection in Finned Tubes", Defektoskopiya, No. 1, pp. 16-19, Jan.-Feb. 1970, (Soviet Journal of Nondestructive Testing, 1970).
Engineering Index, Abstracts, p. 3187, vol. 71, 1968, Abstract of Article by M. Robba.

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