Evaluation of measuring magnetic anisotropy parameters method to monitor the development of erosion and corrosion wear of equipment

Abstract

The paper presents the results of further research in the field of assessing the development of erosion and corrosion wear (ECW) of pipeline elements using a magnetic and anisotropic method to monitor the stress-strain state of ferromagnetic material. The conducted studies show that the recorded parameters of the magnetic anisotropic method, such as the principal mechanical stress difference, make it possible to unambiguously establish a quantitative correspondence to the level of stresses operating in the controlled zone. The possibility of determining the correspondence of the level of effective stresses to the value of the principal mechanical stress difference recorded by the StressVision scanner during the inspection of the structure is proven. The paper shows that in order to organize monitoring of the development of ECW using the magnetic anisotropic method it is necessary to monitor periodically changes in the principal mechanical stress difference and its dispersion and when fixing cut-off points, prescribe additional examinations with other more labor-intensive methods. The possibility of organizing monitoring of ECW equipment development based on the use of a pipeline resource forecasting mechanism in accordance with the provisions of regulatory documentation is confirmed.