Measuring and testing – Vibration – By mechanical waves
Patent
1995-08-03
1996-06-18
Chilcot, Richard
Measuring and testing
Vibration
By mechanical waves
73598, G01N 2904
Patent
active
055266916
ABSTRACT:
A method for detecting corrosion fatigue cracks in membraned boiler tubes in a membrane tube panel employs at least one EMAT coil generating ultrasonic SH shear waves at a predetermined beam angle. The method of the present invention provides better signal-to-noise ratios than conventional ultrasonic techniques as well as not requiring any couplant.
REFERENCES:
patent: 4218924 (1980-08-01), Fortunko et al.
patent: 4685334 (1987-08-01), Latimer
patent: 4953147 (1990-08-01), Cobb
patent: 5038614 (1991-08-01), Bseisu et al.
Power Engineering, May 1992, "A Vision for Reducing Boiler Tube Failures: Part II", Barry Dooly, Electric Power Research Institute.
Latimer Paul J.
MacLauchlan Daniel T.
Chilcot Richard
Edwards Robert J.
Kalka Daniel S.
Noori Max
The Babcock & Wilcox Company
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