Developing validating dissolution procedures

Water pressure and pressure transients were found to be the dominant factor in large water pipe failures.

A laboratory test setup was developed for simulation of water pressure within corroded cast iron pipes and some results of pipe burst was shown to elucidate failure mechanisms.

The role of verification as employed in the project was also discussed, as well as the part that water utilities can play in this process within their own operational procedures for CA.

A quick overview was provided on further side trials carried out with additional direct CA techniques recently developed and thus with less market uptake, including pressure wave propagation and Magnetoelastic sensing.

This is the first in a series of three webcasts presenting the results of Advanced Condition Assessment and Failure Prediction Technologies for Optimal Management of Critical Water Supply Pipes (project #4326).

The external corrosion of cast iron water mains can have severe implications for water utilities and has a long history of investigation.

The framework, developed in Selecting Cost-Effective Condition Assessment Technologies for High-Consequence Water Mains (project #4553), provides guidance and tools on how to select the most cost-effective inspection technology and how to schedule the next condition assessment for a high-consequence pipe or a group of pipes, given knowledge of historical performance, environmental and operational conditions, etc.

One case study was presented to showcase the salient features of the framework.

Definitions of failure were also examined, considering the key strength properties of the cast iron considering pipe cohorts.

This webcast presented and discussed a framework developed to support rational decision making on inspection and condition assessment of high-consequence pipelines.

However, there is a need to focus more on processes – to understand and document how a utility can work better.

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