Challenge
The water utility faced a persistent problem with a troublesome water main that suffered frequent failures. This main, constructed from a combination of Cast Iron Cement-Lined (CICL) and Ductile Iron Cement-Lined (DICL) pipes, some of which had installation dates back over 100 years, was prone to leaks and breaks, causing service disruptions, costly repairs, and potential safety hazards. Traditional inspection methods were disruptive and time-consuming, making it difficult to pinpoint the root causes of the failures.
Solution
The utility engaged Aqua Analytics to conduct a non-invasive pipeline condition assessment using KenWave Dynamic Response Imaging™ (DRI) technology. DRI is an innovative acoustic method that provides detailed insights into pipeline integrity without requiring excavation or disruption to service. Aqua Analytics’ comprehensive approach includes:
- Site Visit and Inspection Plan: A thorough site visit assessed the pipeline's layout, accessibility, and specific challenges. This information was used to develop a customised inspection plan, ensuring efficient and accurate data collection.
- Non-Invasive Data Collection: Aqua Analytics' technicians deployed portable DRI equipment, utilising acoustic signals to assess the pipeline's condition. This non-invasive method allowed for data collection without disrupting service or requiring excavation.
- Data Analysis and Reporting: The collected data was analysed using KenWave's proprietary algorithms, providing a detailed assessment of the pipeline's structural integrity, including wall thickness, stiffness, and potential defects. Aqua Analytics then provided the utility with a comprehensive report with GIS files for easy integration into their existing systems.
- Exhumation and Validation: To confirm the accuracy of the DRI assessment, the utility excavated a section of the pipeline for visual inspection and validation. The results strongly validated the DRI findings, confirming the presence of the identified defects and the need for proactive maintenance.
Results
- Accurate Condition Assessment: DRI technology accurately identified the underlying causes of the pipeline's frequent failures, including areas of reduced wall thickness, corrosion, and structural weaknesses.
- Targeted Repairs and Replacements: Based on the DRI data, the utility could prioritise repairs and replacements, first addressing the most critical issues and preventing future failures.
- Improved Asset Management: The detailed pipeline condition assessment provided valuable insights for the utility's asset management program, enabling it to develop a proactive maintenance strategy for the long-term health of its infrastructure.
- Reduced Service Disruptions: By addressing the root causes of the pipeline failures, the utility minimised service disruptions and ensured a more reliable water supply for its customers.
Client Benefits
- Non-Invasive and Efficient: DRI technology provided a fast, non-invasive, and efficient way to assess the pipeline's condition without disrupting service or requiring costly excavations.
- Accurate and Actionable Insights: The detailed DRI assessment enabled the utility to make informed decisions regarding repairs and replacements, prioritising the most critical areas.
- Improved Asset Management: The data collected through DRI helped the utility develop a proactive maintenance strategy, extending the lifespan of its infrastructure and minimising future failures.
- Cost Savings: By preventing future leaks and breaks, the project contributed significant cost savings regarding repairs, water loss, and operational disruptions.
Conclusion
Aqua Analytics’ successful implementation of KenWave DRI technology for this challenging pipeline assessment demonstrates the power of innovative solutions in addressing the complex issues of aging infrastructure. By providing accurate, actionable insights and a noninvasive approach, Aqua Analytics empowered the water utility to proactively manage its assets, reduce failures, and ensure a more reliable water supply.
