管道缺陷漏磁場和缺陷尺寸關(guān)系的設(shè)計

針對油氣管道腐蝕缺陷定量分析精度很難提高的現(xiàn)狀，根據(jù)腐蝕缺陷評價標(biāo)準(zhǔn)，定義缺陷外形尺寸，設(shè)計現(xiàn)場檢測試驗，并制作大量不同類別的樣本缺陷用于實際檢測試驗。分析了大量缺陷漏磁場數(shù)據(jù)，選取了量化缺陷外形的漏磁場特征，給出了缺陷外形和漏磁場特征的關(guān)系曲線。試驗得出這些特征可有效量化缺陷外形尺寸。

The quantitative analysis of erosion defect in oil-gas pipeline was very difficult.
According to theestimation criterion of pipeline erosion defect, the dimension of pipeline defect was defined, furthermore, lots ofartificial defects were tested and compared. The relationship between magnetic flux leakage data of pipeline defectsand the size of defects was analyzed. Some features of magnetic flux leakage were used to analyze the length, width,depth of defects and their relationship was given. Experimental results proved that the method of defect size analysiswas effective.