Comparison of Different Probes in Inspection of Localized Inner Wall Flaws in Pipe under Insulation with Pulsed Eddy Current
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摘要: 带包覆层工业管道内壁缺陷尤其是内壁局部腐蚀是危害很大的一类缺陷.基于脉冲涡流检测技术,设计了一套用于带包覆层工业管道检测的系统,探讨了探头类型对于内壁局部腐蚀缺陷检测结果的影响.在不同试件管道内壁上加工了不同面积与深度的局部腐蚀缺陷,制作了圆形、双线圈聚焦型、U形聚焦型三种不同类型的检测探头.通过对不同深度内壁缺陷的检测试验,比较了不同探头的检测能力.结果表明,在检测内壁局部腐蚀方面,圆形探头的检测效果较差,双线圈聚焦型探头的检测效果较好,而U形聚焦型探头的检测灵敏度较圆形和双线圈聚焦型均有明显提高.Abstract: Inner wall flaws especially localized corrosion in pipe under insulation are among those most hazardous to pipelines under insulation.An inspection system is designed to detect inner wall flaws in pipe based on pulsed eddy current technique and effects of probe type on diction are studied.Test pieces with different area and depth are made to simulate localized corrosions.Three types of detection probes,circular,double-coil focusing and U-shaped focusing,are designed and manufactured.A series of experiments are performed and detection sensitivities of different probes are compared.The experiments show that U-shaped probe has the highest detection sensitivity among three types of probes while circular probe is the worst for detecting localized inner wall flaws.
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Keywords:
- Pulsed eddy current /
- Insulation /
- Pipe /
- Localized corrosion /
- Probe
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[1] 原培新,牛艳平.带保温层管道腐蚀状态的X射线检测方法研究[J].CT理论与应用研究,2007,16(3):36-42. [2] CAWLEY P,LOWE M,ALLEYNE D,et al.Practical long range guided wave testing:Applications to Pipes and rail[J].Materials Evaluation,2003,61(1):66-74. [3] 常玉连,邵守君,高胜.石油工业中管道机器人技术的发展与应用前景[J].石油机械,2006,34(9):122-126. [4] ALLEYNE D.Guided Wave Testing for touch point corrosion[C]// Proceedings of 18th World Conference on Non-destructive Testing.Northampton,United Kingdom:WCNDT,2012. [5] WINNIK S.Corrosion Under Insulation Guidelines (European Federation of Corrosion Publications NUMBER 55)[M].Cambridge England:Woodhead Publishing and Maney Publishing,2008. [6] RUDLIN J.New Developments in Automated Inspection for Corrosion under Insulation[C]//Proceedings of 9th ECNDT.Berlin,Germany:[S.n],2006. [7] CROUZEN P,MUNNS I.Pulsed eddy current corrosion monitoring in refineries and oil production facilities-experience at shell[C]∥Proceedings of 9the ECNDT.Berlin,Germany:[S.n],2006. [8] 黄琛.铁磁性构件脉冲涡流测厚理论与仪器[D].武汉:华中科技大学,2011. [9] 闫贝,李勇,刘相彪,等.基于固态磁场传感器的脉冲涡流检测铁磁性构件腐蚀缺陷[J].无损检测,2014,36(10):15-18. [10] 王健,滕永平,傅迎光,等.铁磁材料脉冲涡流厚度检测中的边缘效应[J].无损检测,2013,35(8):54-60. [11] 林俊明,林发炳,林春景.隔热层下钢管壁厚脉冲涡流检测系统[J].无损探伤,2006,30(6):26-27. [12] 付跃文,康小伟,喻星星.带包覆层铁磁性金属管道局部腐蚀的脉冲涡流检测 [J].应用基础与工程科学学报,2013,21(4):786-795. [13] 付跃文,喻星星.油套管腐蚀脉冲涡流检测中探头类型的影响[J].仪器仪表学报,2014,35(1):208-217.
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