Challenge
The utility partnered with Aqua Analytics to conduct a condition assessment on three critical water mains. The solution leveraged KenWave’s Dynamic Response Imaging (DRI) technology, a non-invasive acoustic method that assesses the remaining wall thickness of a pipeline without disrupting service or requiring excavation.
The project was designed to provide actionable intelligence on the asset’s current state, allowing the utility to make informed decisions about maintenance and renewal.
Methodology
The methodology for this project was centered on KenWave’s Dynamic Response Imaging (DRI) technology, a non-intrusive and non-destructive method for assessing pipeline condition. This process uses nonlinear vibroacoustics to gather data from external access points, such as hydrants, valves and potholes, to determine both the presence of leaks and the residual wall thickness of the pipes.
- Detailed Inspection Plan: Aqua Analytics developed a comprehensive inspection plan for the three pipelines, ranging in diameter from 150mm to 600mm.
- Non-Intrusive Technology: Using KenWave DRI, a team of technicians introduced specific acoustic signals into the water column and used sensors at existing access points (hydrants, valves and hydrovac potholes) to measure the pipe's dynamic response.
- Data Analysis: The collected data was analysed in both the time and frequency domains to generate a residual wall thickness profile for each pipeline at a high resolution. This process provided a precise map of the pipe's structural integrity.
- Leak Detection: As part of the same non-intrusive survey, the methodology also included a leak detection component to identify any existing leaks or anomalies.
Project Outcomes
- 952.3m of AC pipes inspected: A comprehensive condition assessment was completed on three separate pipelines, providing the utility with a detailed report on the state of almost a kilometer of critical assets.
- Remaining wall thickness profiles generated: The project successfully produced a detailed profile of the remaining wall thickness for all three pipelines, with results showing sections ranging from 52% to 100% of their original nominal thickness.
- No leaks or anomalies found: The DRI inspection confirmed the immediate operational integrity of the three mains, providing the utility with peace of mind.
Conclusion
This project demonstrates the critical value of non-invasive condition assessment for Western Australian water utilities and asset owners managing ageing infrastructure.
By leveraging KenWave’s DRI technology, Aqua Analytics provided the client with a precise, data-driven report on the condition of their asbestos cement (AC) pipes without the costs or disruption of excavation.
This actionable intelligence, gained from a detailed condition assessment, allows the utility to move from reactive maintenance to proactive asset management, prioritising renewal projects based on factual data and ensuring the long-term reliability and sustainability of their water network in Western Australia.
