Measuring and testing – Vibration – By mechanical waves
Patent
1976-03-17
1977-11-01
Myracle, Jerry W.
Measuring and testing
Vibration
By mechanical waves
73592, 73619, 73621, 73622, 73637, 73638, G01N 2904
Patent
active
040559890
ABSTRACT:
A weld inspection system uses fluoroscopic flaw detection particularly sensitive to volumetric type weld flaws and ultrasonic flaw detection particularly sensitive to planar type weld flaws. Both inspections are performed simultaneously throughout the pipe length. Each system marks the pipe with a distinguishing mark to identify the location of the flaw detected by that system. The fluoroscopic system is a high resolution system, the ultrasonic system avoids detection of minor non-rejectable variation in weld bead geometry and is calibrated to a desired sensitivity level.
REFERENCES:
patent: 3448606 (1969-06-01), Flaherty et al.
patent: 3686932 (1972-08-01), Ries et al.
Barkow, A. G., NDT Applied to Pipeline Construction and Operation in the U.S.A. from Materials Evaluation, Apr. 1967, pp. 65, 72.
Henry, Jr. Edwin Blair
Patsey John A.
Rudolph Ralph G.
Schindler Donald G.
Helm Rea C.
Myracle Jerry W.
United States Steel Corporation
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