High accuracy wall thickness loss monitoring
High accuracy wall thickness loss monitoring
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DOI：
10.1063/1.4865026
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发表时间：
2014-02
影响因子：
--
通讯作者：
A. Gajdacsi;F. Cegla
中科院分区：
文献类型：
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作者：
A. Gajdacsi;F. Cegla
管道壁厚超声检测是石油化工行业广泛应用的一项标准技术。然而，永久安装的超声波传感器重复测量的潜在精度远远超过手持式传感器，因为消除了与耦合流体和位置偏移相关的不确定性。有了永久安装的传感器，在几个小时内就可以精确评估非常小的墙体损失率。墙体损失率测量精度和速度的提高可用于评估和开发更有效的缓解策略。本文概述了引起超声测量变异性的因素，并对这些因素进行了系统的讨论，并在此基础上提出了一种具有最佳稳定性的实验装置。在实验装置中，电偶腐蚀被用来引起可预测的、非常小的壁厚损失。此外，实验结果还表明，这种实验方法是可行的。
Ultrasonic inspection of wall thickness in pipes is a standard technique applied widely in the petrochemical industry. The potential precision of repeat measurements with permanently installed ultrasonic sensors however significantly surpasses that of handheld sensors as uncertainties associated with coupling fluids and positional offsets are eliminated. With permanently installed sensors the precise evaluation of very small wall loss rates becomes feasible in a matter of hours. The improved accuracy and speed of wall loss rate measurements can be used to evaluate and develop more effective mitigation strategies. This paper presents an overview of factors causing variability in the ultrasonic measurements which are then systematically addressed and an experimental setup with the best achievable stability based on these considerations is presented. In the experimental setup galvanic corrosion is used to induce predictable and very small wall thickness loss. Furthermore, it is shown that the experimental me...