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Electromagnetic methods for inspection of ferrous tubing [electronic resource].

Published:
Columbus, Ohio : Battelle Memorial Institute, 1974.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
Pages: 20 : digital, PDF file
Additional Creators:
Battelle Memorial Institute and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Electromagnetic-acoustic (EMAC) techniques have been applied to the nondestructive inspection of ferromagnetic tubing. EMAC combines the advantages of noncontract electromagnetic inspection with the flaw detection capabilities of ultrasonic inspection techniques. Laboratory studies have demonstrated the capabilities of the method for detecting cracks, pits, and wall thinning in carbon steel boiler tubing. Results of the studies demonstrate the feasibility of using internal EMAC probes for inspection of installed tubing. Multiparameter eddy current techniques show promise for detecting wall thinning in ferromagnetic tubing. A two frequency multiparameter eddy current system was shown to provide the parameter separation capability necessary for the detection of wall thinning in the presence of shallow internal pitting and surface scale. Machined steps in the wall of carbon steel tubing were detected with the multiparameter system. An internal magnetization probe was applied to ferromagnetic tubing. The internal magnetization probe concept may be used to produce increased penetration of eddy current signals, to reduce magnetic permeability variations in ferrous tubing, and can be incorporated into EMAC inspection probes. Further development of one or more of these electromagnetic inspection techniques may provide a means for field inspection of installed ferrous tubing.
Report Numbers:
E 1.99:bn-sa-311
E 1.99: conf-741074-2
conf-741074-2
bn-sa-311
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Other Subject(s):
Note:
Published through SciTech Connect.
04/24/1974.
"bn-sa-311"
" conf-741074-2"
Fall conference of American Society for Nondestructive Testing, Detroit, MI, USA, 21 Oct 1974.
Crowe, J.C.
Funding Information:
EY-76-C-06-1830
View MARC record | catkey: 14117126