July 2019, Vol. 246, No. 7

Features

SwRI Improves Structural Monitoring of Aging Pipelines with Transducers

By Sergey Vinogradov and Jay Fisher, Southwest Research Institute Maintenance of aging pipelines, especially ones that are insulated and/or buried, is a major challenge, due to limited access for application of conventional nondestructive evaluation (NDE) techniques. Even when access is available, financial and time constraints mean that conventional NDE is often carried out on a sampling basis, which makes it less reliable than full coverage inspection. Long-range guided wave testing (GWT), a potential solution to this problem, has been commercially available for conducting inspections for about 20 years. This technology, which uses low-frequency ultrasonic waves that are guided by the st

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