Long Term Durability of Mechanical Joint Restraiints used on Non-Metallic Pipe

Project ID: 1793
Principal Investigator: Daryl Little
Research Topic: Repair and Maintenance
Funded Fiscal Years: 2017
Keywords: None

Research Question

Can mechanical joint restraints for non-metallic pipe be successful for longterm service? The restraints involve bolts which push anchors onto and slightly into the surface of the pipe. What significant damage will these contact points cause over time? Plastic can creep over time and a weakened area may be more susceptible particularly since the pipe may encounter slight water pressure deviations causing pipe movement. Finally, will the restraints decrease their hold on the pipe or relax over its lifetime? These are all important questions which must be looked at in order to improve confidence in using them on multi-million dollar projects.

Need and Benefit

One of Reclamation's main goals and responsibility for the delivery of water and pipe failure can cause major issues including disruption of service, damage, and high costs for repair or replacement. The use of these restraints may decrease costs and construction problems but not enough in known or understood about their longevity. Due to projects with the potential of using these products there is an urgency in investigating at them at this time.

Contributing Partners

Contact the Principal Investigator for information about partners.

Research Products

Bureau of Reclamation Review

The following documents were reviewed by experts in fields relating to this project's study and findings. The results were determined to be achieved using valid means.

Long Term Durability of Mechanical Joint Restraiints used on Non-Metallic Pipe (final, PDF, 1.4MB)
By Atousa Plaseied, Daryl Little
Research Product completed on September 30, 2017

This research product summarizes the research results and potential application to Reclamation's mission.

Long Term Durability of Mechanical Joint Restraiints used on Non-Metallic Pipe (final, PDF, 1.4MB)
By Atousa Plaseied, Daryl Little
Research Product completed on September 30, 2017

This research product summarizes the research results and potential application to Reclamation's mission.


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Last Updated: 4/4/17