In various plants in the thermal power plant and the nuclear plant, a lot of steel tubes are used for various places such as heat exchangers, and these steel tubes should inspect regular for a healthy securing of the plant. Then, the outer side defect inspection of the magnetic substance steel tube using an electromagnetic phenomenon was examined in this research. It is shown that the inspection of the outer side defect on a steel tube with baffle is possible using the proposed method....
英字タイトル:
Proposed examination of defect detection of magnetic tubewhere alternating prove in type of insertion is used

The inspection of the defect in the steel wall of the oil tank in the petrochemical plant etc. is important for the safe maintena nce. In this paper, the electromagnetic inspection method using a de magnetic field and a minute ac magnetic field is proposed. G enerally, in the steel, the relative permeability is not unity.Therefore, the technique for reducing the effect of the nonuniformi ty of the permeability in the steel, and measuring the opposite side defect on the steel wall is examined using 3D nonli...
英字タイトル:
Examination of 3-D nonlinear FEM for thickness on steel plate using static magnetic field and minute alternating electromagnetic field