管道保温层下腐蚀超声导波检测

针对压力管道保温层下腐蚀的危害性及传统检测技术的局限性，分析了保温层下腐蚀的原理，通过实际案例验证导波检测技术对含保温层管道腐蚀减薄检测的可行性。对在役保温层管线进行检测，得出所采集的数据，进行分析对比。提出对点蚀检测应综合分析，设置合理的阀值，从而评判缺陷的位置和大小。研究结果表明超声导波检测可为保温层下腐蚀管线提供综合评定，并为管线腐蚀在线检测提供可靠依据。

Ultrasonic Guided Wave in Pipeline Corrosion under Insulation

This paper mainly focuses on the limitations of the traditional detection technology and the harmfulness of pipeline corrosion in pressure piping. Through the analysis of corrosion principle under insulation layer, combined with the technology of ultrasonic guided wave, the petrochemical enterprise pipeline corrosion status was detected. Through actual experiment the insulation layer was removed to verify the feasibility of this detection technique. The data collection and analysis comparison were given for the detection of the pipeline in the service insulation layer. Also for the detection of single defect point, the technique needed further adjustment; by setting critical threshold, the position and size of the defect could be obtained. This research can offer effective solution for the comprehensive assessment of industrial pipeline corrosion under petrochemical enterprise and the judgment of on line detection.