Vertical Storage Panels Scanning For Testing Method Of Magnetic Flux Leakage Research

Oilfield tanks are made from ferromagnetic material, they run under the varying conditions of natural environment and liquid level for a long time, and they are affected by many kinds of unfavorable factors, then inevitably subjected to various injuries. If the injuries can't be found and improved in time, they will lead to fire, cause environmental pollution and casualty accidents, the influence surface is wide, and the harmfulness is great. So necessary measures must be taken to prolong the tank life. Recently, with the development of computer software and hardware and nondestructive testing theory, intelligent inspection has become possible.In this paper, leakage magnetic field of tank wall defects in the vertical storage tank is taken as the research object, the method of theoretical analysis, finite element analysis,and experimental study are synthetically used to make the detection and analysis for leakage magnetic field of tank wall defects in the vertical storage tank. The basic principle of magnetic flux leakage testing is analyzed, leakage magnetic field is studied by use of finite element method in the numerical calculation of electromagnetic fields, finite element method is applied to found the three-dimensional model and make a simulation for defect magnetic flux leakage field in the detection on leakage magnetic field of tank wall defects, effect on defect magnetic flux leakage field caused by various factors is analyzed.On the basis of theoretical analysis and finite element analysis, modeling and assembly design for magnetic flux leakage testing system of tank wall in the vertical storage tank are carried out by using the drawing software. Magnetic flux leakage testing system of tank wall in the vertical storage tank is developed, the results show that tank wall defects which are greater than threshold can be detected, and result is accurate, expected target is realized.