Published scientific research and whitepapers on the use of ultrasonic technology in pipeline condition assessment
Widely used for water distribution and sewage systems due to cost-effectiveness and durability, asbestos cement (AC) pipelines face vulnerability over time, especially to sulphate attacks that degrade the cement matrix. Acquaint BV has been a leader in inspecting AC pipelines since 2016, using advanced ultrasound technology. In 2017, they discovered clear evidence of a sulphate attack in AC pipelines. This white paper outlines findings from Acquarius inspections on sulphate attacks in asbestos pipelines, validated comprehensively through drill core samples.
Asbestos cement pipes, widely used in water and sewage systems for their strength and durability, face risks as they age due to calcium leaching from environmental exposure, particularly water. This compromises their structural integrity, leading to potential failures and water contamination. This report compares ultrasound and CT scan techniques for quantifying and visualizing calcium leaching in asbestos cement pipes, aiming to provide insights into their applicability and effectiveness in assessing pipeline condition and remaining service life.
In this research the use of X-ray computed tomography (CT) is explored for assessing the degradation of AC pipes from the field. CT scans reveal detailed insights, highlighting the importance of comprehensive understanding of pipe degradation. The study validates CT through comparisons with strength tests and a commercial inspection technique, showcasing its utility for detailed measurement of pipe degradation crucial for water utilities.
This study suggests a method to translate ultrasonic signals from pipeline inspections into degradation levels for a cement-based drinking water system. Using data from a Dutch water main, it automates the process to estimate relative degradation levels and visualize the degraded condition. The study emphasizes the importance of considering the speed of sound in cement for determining degraded depth, while acknowledging the need for further research on absolute degradation levels.
The study aims to assess the condition of the Dutch drinking water network, focusing on identifying assets near the end of their lifespan. Using ultrasonic testing, the research specifically examines degradation in cement-based pipes due to acidic attacks. Measurement involves ultrasonic pulse velocity in mortar blocks exposed to hydrochloric acid. The study highlights key factors in detecting acid-induced damage, emphasizing the suitability of a transducer for this purpose.