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The inspection of the opposite side defect in the steel wall in the petrochemical plant is necessary for safe maintenance. Generally, the alternating magnetic flux leakage testing (AMT) is used for detecting only the surface defect of the steel plate. In this paper, electromagnetic inspection method for the detecting of the opposite side defect in steel plate using this AMT method by applying the...
The alternating magnetic flux leakage testing is one of the electromagnetic non-destructive inspection method for detecting the surface defect on steel plate. By this inspection method, since the alternating magnetic field of high frequency is used, only the surface defect on the steel plate is detected. In this paper, the inspection method for the opposite side defect in the steel plate using the...
It is known that the detection of cracks on the outer side of steel plate is possible using the dc flux leakage testing. If the examined steel plate is thin, the outer side crack may be detected by alternating flux leakage testing. The merit of the alternating flux leakage testing method is that a cheap coil is used for detecting the leakage flux from the crack. In this paper, the inspection method...
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