螺旋焊缝噘嘴错边缺陷三轴漏磁信号分析  

The Triaxial Magnetic Flux Leakage Signal Analysis of Spiral Weld Roof Topping and Hi-Low Defects

作　　者：冯庆善[1,2] 宋汉成[2] 王学力[2] 王富祥[2] 李宾[1] 

机构地区：[1]北京航空航天大学材料学院,北京100083 [2]中国石油管道研究中心,廊坊065000

出　　处：《无损检测》2009年第5期340-344,共5页Nondestructive Testing

摘　　要：东部管道螺旋焊缝的未焊透、未融合等缺陷严重威胁着管网的安全运行。为了解决此类缺陷检测难题,在东北原油管道开展了三轴高清漏磁内检测技术试验。原试验分析结果认为噘嘴和错边等缺陷是导致螺旋焊缝信号异常的主要原因,并由此判断漏磁检测技术不能检测出导致螺旋焊缝开裂的主要缺陷。通过对漏磁检测技术原理和信号特征进行统计分析,并通过理论推理和试验验证等方法,提出噘嘴和错边等几何缺陷不是导致螺旋焊缝缺陷信号异常的主要因素。更新了业界对三轴高清漏磁检测螺旋焊缝缺陷的认识,拓宽了研究的思路。The defects of incomplete penetration, incomplete fusion and etc within East pipeline became a critical threat to pipeline safe operatioru In order to solve the difficult problem of defect inspection, we carried on triaxial high-resolution magnetic flux leakage inspection test within Northeast crude oil pipeline. It was originally thought that the defects of roof topping, hi-low and etc were the principal factor causing spiral weld defect signal anomaly with the inspection analysis results. Du to this conclusion, triaxial tools could not detect the spiral welding incomplete penetration defects. The authors of this paper put forward the doubtful points with foreign company conclusion, and gave the process of demonstration and experimental verification, also the obtained conclusions, thought that the defects of roof topping, hi-low and etc is not the principal factors causing spiral weld defect signal anomaly. This paper obtained the result different from foreign company＇s conclusions, updated the knowledge of triaxial high-resolution magnetic flux leakage inspection for spiral weld defect, and broadened the research idea.

关 键 词：管道 螺旋焊缝 噘嘴 错边 缺陷 三轴高清漏磁内检测 信号分析 

分 类 号：TG115.28[金属学及工艺—物理冶金]