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INSTRUCTORS:
Juanyi Duan
Madhuri Arjun, Ph.D.
Ashan McNealy, P.E.
Purpose and Background
These presentations were recorded at the UESI Pipelines 2025 Conference.
Computational Assessment of Pitting Corrosion in Cast-Iron Pipelines Rehabilitated by Cured-in-Place-Pipe Liner (20 minutes)
This presentation explores a computational approach for evaluating the structural performance of cast iron pipelines affected by pitting corrosion and rehabilitated with cured-in-place-pipe (CIPP) liners. Using a three-dimensional finite element model, the study simulates various pit geometries, depths, and distributions to assess their effects on stress concentration and structural integrity. Sensitivity analyses reveal that pit radius, depth, and shape ratio are dominant factors influencing pipe strength, while clustered pits show less significant impact compared to deeper or elongated pits. The research demonstrates how CIPP liners can restore structural capacity but also underscores the need for careful evaluation under different damage conditions. The findings provide insights for proactive pipeline maintenance, rehabilitation design, and future integration with physical testing and machine learning methods.
Striking a Balance in the North: How Edmonton Gets the Most from Its Water Transmission Main Condition Assessment Program (15 minutes)
This presentation highlights Edmonton’s approach to managing the condition of its large-diameter water transmission mains under severe climate constraints. EPCOR Water Services faces unique challenges, including short construction windows, extreme cold temperatures, and limited redundancy in summer. To address these issues, EPCOR has invested in a robust condition assessment program that integrates desktop modeling, inline inspection technologies, and proactive valve management. The program has enabled rapid identification and repair of distressed pipes, avoiding costly failures and building confidence among stakeholders. By balancing inspection frequency, operational risks, and capital investment, Edmonton has developed a sustainable framework for ensuring the reliability of its transmission mains.
A Review of the Challenges to Large Diameter Water Pipeline Maintenance Inspections (21 minutes)
This presentation reviews the operational, logistical, and safety challenges associated with inspecting and maintaining some of the world’s largest water pipelines. Drawing on experience from the Central Arizona Project, the discussion covers dewatering procedures, hazardous energy control, confined space entry, ventilation, and emergency planning for remote locations. Unique issues such as fish removal, communication in long tunnels, and seal deterioration further complicate inspection planning. The presentation emphasizes the importance of extensive preparation, redundant safety systems, and lessons learned from past inspections. By addressing these challenges, utilities can improve inspection efficiency, enhance worker safety, and extend the service life of critical infrastructure.
Benefits and Learning Outcomes
Upon completion of this course, you will be able to:
- Describe the influence of pit radius, depth, and shape ratio on stress concentrations in corroded cast iron pipelines.
- Explain how computational modeling and CIPP liners contribute to predicting and enhancing pipeline rehabilitation outcomes.
- Identify the challenges and strategies involved in conducting condition assessments in extreme northern climates.
- Discuss how Edmonton integrates inspection technologies, planning, and rapid repair to mitigate risks in its water transmission system.
- Describe the operational and safety challenges encountered during large-diameter water pipeline inspections.
- List how planning, safety protocols, and innovative methods (e.g., ventilation and isolation techniques) enhance the success of maintenance programs.
Assessment of Learning Outcomes
Students' achievement of the learning outcomes will be assessed via a short post-test assessment (true-false, multiple choice, and/or fill in the blank questions).
Who Should Attend?
- Utility and Pipeline Engineers
- Design and Consulting Engineers
- Construction Contractors
- Project Managers
- Academic and Professional Researchers
- Early Career and Pipeline Professionals
How to Earn Your CEUs/PDHs and Receive Your Certificate of Completion
To receive your certificate of completion, you will need to complete a short post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.
How do I convert CEUs to PDHs?
1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]