A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Service Life Extension Option for Large-Diameter Potable-Water Transmission Pipelines
In 2013, Tacoma Water completed the robotic application of a semistructural polyurea liner in 2,168 lineal ft of 58-in. ID steel pipe installed in 1936 and repaired numerous times over the years to seal pin-hole leaks. Selection of a spray-applied, semistructural polyurea liner (defined by AWWA Manual M28 as a Class III semistructural liner) for rehabilitation of the pipeline on this project began in 2011 with the development of a business case evaluation (BCE), which compared the life-cycle cost and social/environmental impact of various rehabilitation methods to identify the least expensive and least disruptive option to seal leaks and extend the service life of the pipeline. The BCE included consideration of an option to continue repairing leaks until 2036 when the pipeline would be scheduled for replacement (i.e., the business-as-usual option); complete and immediate replacement of the pipeline with an equal size steel pipe with polyurethane coating and lining; slip-lining with a 54-in. OD HDPE pipe; spray-applied, semistructural polyurea liner; cured-in-place pipe; and cement-mortar lining. Although the Class III liner option was more expensive than the business-as-usual option, it was considerably less expensive than the replacement option and it made less of a social/environmental impact than either the business-as-usual option or replacement option. The other options considered did not meet technical requirements or were more expensive. This paper and presentation will cover the process used to evaluate pipe rehabilitation options and Class III liner pros and cons, polyurea material properties and testing, and application technology; review the performance of the lining application; and present the lessons learned from the first successful large-diameter, potable-water spray-applied, semistructural polyurea liner installation. Attendees at this presentation will acquire new knowledge about the advances in Class III liner design, polyurea material development, and robotic lining technology. Specifications, product literature, and industry partner information will be available for distribution. Spray-applied, semistructural liners created using specially developed polyureas applied with the proper equipment in the right conditions can certainly be considered as a cost-effective and low-impact option for the rehabilitation of large-diameter, potable-water pipelines. This paper and presentation will demonstrate that Tacoma Water is at the forefront of innovation and sustainability.
Service Life Extension Option for Large-Diameter Potable-Water Transmission Pipelines
In 2013, Tacoma Water completed the robotic application of a semistructural polyurea liner in 2,168 lineal ft of 58-in. ID steel pipe installed in 1936 and repaired numerous times over the years to seal pin-hole leaks. Selection of a spray-applied, semistructural polyurea liner (defined by AWWA Manual M28 as a Class III semistructural liner) for rehabilitation of the pipeline on this project began in 2011 with the development of a business case evaluation (BCE), which compared the life-cycle cost and social/environmental impact of various rehabilitation methods to identify the least expensive and least disruptive option to seal leaks and extend the service life of the pipeline. The BCE included consideration of an option to continue repairing leaks until 2036 when the pipeline would be scheduled for replacement (i.e., the business-as-usual option); complete and immediate replacement of the pipeline with an equal size steel pipe with polyurethane coating and lining; slip-lining with a 54-in. OD HDPE pipe; spray-applied, semistructural polyurea liner; cured-in-place pipe; and cement-mortar lining. Although the Class III liner option was more expensive than the business-as-usual option, it was considerably less expensive than the replacement option and it made less of a social/environmental impact than either the business-as-usual option or replacement option. The other options considered did not meet technical requirements or were more expensive. This paper and presentation will cover the process used to evaluate pipe rehabilitation options and Class III liner pros and cons, polyurea material properties and testing, and application technology; review the performance of the lining application; and present the lessons learned from the first successful large-diameter, potable-water spray-applied, semistructural polyurea liner installation. Attendees at this presentation will acquire new knowledge about the advances in Class III liner design, polyurea material development, and robotic lining technology. Specifications, product literature, and industry partner information will be available for distribution. Spray-applied, semistructural liners created using specially developed polyureas applied with the proper equipment in the right conditions can certainly be considered as a cost-effective and low-impact option for the rehabilitation of large-diameter, potable-water pipelines. This paper and presentation will demonstrate that Tacoma Water is at the forefront of innovation and sustainability.
Service Life Extension Option for Large-Diameter Potable-Water Transmission Pipelines
Peloquin, Michel (author)
Pipelines 2014 ; 2014 ; Portland, Oregon
Pipelines 2014 ; 1457-1469
2014-07-30
Conference paper
Electronic Resource
English
Service Life Extension Option for Large-Diameter Potable-Water Transmission Pipelines
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