Ultrasonic testing is a non-invasive survey and can be done using a portable meter to provide wall thickness results for pipework.
It helps determine the condition of the pipework non-destructively and provides sanity checks on existing systems when new works are planned or after a failure has occurred. It is also an important part of a preventive maintenance strategy to keep systems safe from leakage, as, when performed regularly, it provides valuable information about the trends in the system's history which helps proactive maintenance regimes.
While ultrasonic testing is a relatively simple measuring process, it takes experience and good corrosion and water system knowledge to know where to test and how to understand and use the obtained data.