Method of detecting flaws in thick wall steel pipe with ultrason

Details Method of detecting flaws in thick wall steel pipe with ultrason Method of detecting flaws in thick wall steel pipe with ultrason

1985-10-04

1987-07-14

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73637, 73638, G01N 2904

Patent

active

046794379

ABSTRACT:
A method of reliably detecting flaws in a thick wall steel pipe with an ultrasonic beam in which flaws of the internal surface of the pipe are detected using a shear wave mode. The transmitting probe is disposed slantingly relative to both the longitudinal and transverse directions of the pipe so that the shear wave emitted therefrom is incident onto the pipe at a refraction angle of 35 to 70 degrees, whereby the beam inside the walls of the pipe is made to impinge on surface flaws of the inner surface of the pipe at an angle in the same range.

REFERENCES:
patent: 3302453 (1967-02-01), Wood et al.
patent: 3552190 (1971-01-01), Lefebvre
patent: 4434660 (1984-03-01), Michalls

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