The Babcock & Wilcox Company

Amos E Holt

Hubert L Whaley

William E Lawrie

Ronald N Roseveare

Allen E Wehrmeister

Flora J Harris

Albert Stingel Birks

Robert J Birchak

An electromagnetic inspection system for detecting, in-situ, the location and character of flaws in a relatively long, thick-walled small bore tube of a heat exchanger wherein a resultant magnetic field is induced in the wall of the tube of selected direction and magnitude by the vector addition of the magnetic fields produced by two magnetic field generators, at least one of which is carried by a scanner for traversing the tube and having an array of sensors mounted in close proximity to the wall of the tube generating a unique signal as the scanner passes a flaw in the tube.

Electromagnetic flux leakage inspection system for ferromagnetic tubes

A method for deriving the eddy current signature of a flaw in a tube proximate a contiguous member which is obscured in the composite signature of the flaw and contiguous member by subtracting from the composite signature a reference eddy current signature generated by a facsimile of the tube and contiguous member.

Method for generating the eddy current signature of a flaw in a tube

An illustrative embodiment of the invention provides a method and apparatus for magnetic inspection of areas of interest in ferromagnetic material by means of both alternating and direct current induced magnetic fields. Moreover, the magnetic fields may be pulsed sequentially and/or simultaneously to detect defects deep within the area of interest.

Method and apparatus for magnetic inspection through adjustable pulsed

A mobile fluid coupled test probe wherein communication between a transducer and an object under inspection is maintained through a fluid couplant which also serves to maintain engagement of the probe with the object.

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Lynchburg, VA, United States of America

Amos E Holt