Guided wave attenuation in coated pipes buried in sand
Guided wave attenuation in coated pipes buried in sand
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DOI：
10.1063/1.4940476
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
E. Leinov;P. Cawley;M. Lowe
中科院分区：
文献类型：
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作者：
E. Leinov;P. Cawley;M. Lowe
长程导波测试（GWT）通常用于监测和检测各行业地上管道的腐蚀缺陷。由于能量泄漏到埋地土壤中，与地上管道相比，埋地涂层管道的 GWT 测试范围大大减小。在这项研究中，我们的目标是扩大埋地管道的测试范围。使用全尺寸实验装置和模型预测研究了管道涂层对 T(0,1) 和 L(0,2) 导波衰减的影响。对熔结环氧树脂 (FBE) 涂层的 8” 管道进行测试，管道埋在松散和压实的沙子中，频率范围为 10-35 kHz。应用低阻抗涂层可以有效地消除沙子对埋地管道超声波泄漏的影响。我们通过在管道上涂覆聚乙烯 (PE) 泡沫层来演示埋地管道的超声波隔离，该泡沫层具有 比管道和沙子的阻抗更小，并且能够承受过度...
Long-range guided wave testing (GWT) is routinely used for the monitoring and detection of corrosion defects in above ground pipelines in various industries. The GWT test range in buried, coated pipelines is greatly reduced compared to aboveground pipelines due to energy leakage into the embedding soil. In this study, we aim to increase test ranges for buried pipelines. The effect of pipe coatings on the T(0,1) and L(0,2) guided wave attenuation is investigated using a full-scale experimental apparatus and model predictions. Tests are performed on a fusion-bonded epoxy (FBE)-coated 8” pipe, buried in loose and compacted sand over a frequency range of 10-35 kHz. The application of a low impedance coating is shown to effectively decouple the influence of the sand on the ultrasound leakage from the buried pipe. We demonstrate ultrasonic isolation of a buried pipe by coating the pipe with a Polyethylene (PE)-foam layer that has a smaller impedance than both pipe and sand and the ability to withstand the overb...