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On the assessment of low-frequency electric-resistance-welded linepipe defects by EMAT and CMFL in-line inspection

机译:用EMAT和CMFL在线检测评估低频电阻焊管道缺陷

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The occurrence of low-frequency electric-resistance-welded (LF-ERW) or electric-flash-welded (EFW) linepipe imperfections has been the root cause of many integrity-management initiatives to minimize and mitigate the risk of pipeline failure across the oil and gas pipeline industry. Since their first appearance in the 1920s, defects in or near the LF-ERW and EFW seam repeatedly lead to either hydrostatic test or in-service failures.Where in the past in-line inspection (ILI) technologies might have experienced limitations in addressing vintage ERW linepipe defects, modern smart ILI technologies show enhanced capabilities. High-resolution electro-magnetic transducer (EMAT) and circumferential magnetic-flux leakage (CMFL) ILI technologies have advanced in the recent years enabling more challenging inspections. This paper summarizes the inspection results of defects detected and reported by EMAT and CMFL in a 22-in ERW linepipe. Correlation of ILI and manual NDE data enables evaluation of current ILI capabilities and improvement of current defect-assessment methods.
机译:低频电阻焊(LF-ERW)或电闪焊(EFW)管道缺陷的发生已成为许多完整性管理计划的根本原因,这些计划旨在最大程度地减少并减轻整个石油管道故障的风险和天然气管道行业。自1920年代首次出现以来,LF-ERW和EFW接缝中或附近的缺陷反复导致静水压测试或使用中的故障。过去,在线检查(ILI)技术可能在解决老式问题方面遇到了局限性ERW管道缺陷,现代智能ILI技术显示出增强的功能。近年来,高分辨率电磁换能器(EMAT)和周向磁通泄漏(CMFL)ILI技术已经取得了进步,可以进行更具挑战性的检查。本文总结了EMAT和CMFL在22英寸ERW管道中检测和报告的缺陷的检查结果。 ILI和手动NDE数据的相关性使得能够评估当前ILI功能并改进当前的缺陷评估方法。

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