Latest revision as of 20:37, 3 February 2021

Abstract

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...

Original document

The different versions of the original document can be found in:

• http://dx.doi.org/10.1063/1.4940476

• http://hdl.handle.net/10044/1/32663

• https://aip.scitation.org/doi/pdf/10.1063/1.4940476

• http://ui.adsabs.harvard.edu/abs/2016AIPC.1706c0004L/abstract,

https://aip.scitation.org/doi/10.1063/1.4940476,

http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4940476,

https://spiral.imperial.ac.uk/handle/10044/1/32663,

https://academic.microsoft.com/#/detail/2333671652