prestressed concrete cylinder pipe Articles
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Effects of the Location of Broken Prestressing wires wraps in structural integrity of a damaged PCCP
Abstract Breakage of prestressing wire wraps is an indication of damage in Prestressed Concrete Cylinder Pipe (PCCP) due to corrosion, hydrogen embrittlement, overloading, and manufacturing defects. The strength of the damaged pipe is not only related to the number of broken prestressing wire wraps but also to the location of the break regions along the length of the pipe. In this paper, a ...
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Managing Metallic Pipeline Networks In A Sustainable Manner
In North America, the material and size of pipes that make up water and sewer networks range widely. Because these pipeline systems are so complex, it requires a strategic approach based on risk and real data for effective long-term management. Historically, however, it has been challenging to gather real data that can shape defensive capital decisions for an entire system. The assessment of ...
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Pressure-Transient Monitoring Supports Leak Detection
Since implementing a pressure-transient technology platform to monitor its 200-mile network, a Georgia water utility improved its asset management planning and ability to identify and respond to leaks. COBB County-Marietta Water Authority (CCMWA) is a water wholesaler that operates about 200 miles of transmission mains near Atlanta. The system’s primary loop is 75 miles long, with pipe ...
By Syrinix Ltd
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The Use of Untethered Acoustic Ball Technology To Locate Leaks in Pressurized Water Mains - Case Study
A CAUTIONARY CASE STUDY: MINNEAPOLIS, MINNESOTA, USA Investor-owned & municipal utilities may experience catastrophic damage if it relies on Untethered Acoustic Ball technology to locate leaks. As shown below, the inspection of a 10,000-feet (3km) of 36-inch (913mm) diameter Prestressed Concrete Cylinder Pipe (PCCP), gave a clean-bill-of-health with ‘NO LEAKS’ using a leading ...
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Getting ready for a larger panama canal - assessing a critical large diameter force main
Abstract Opened in 1905, the Government Cut is a manmade shipping channel between Miami Beach and Fisher Island, which allows better access to the Port of Miami in Miami, Florida. Before the Cut was established, a single peninsula of dry land stretched from what is now Miami Beach to what is now Fisher Island, and boats destined for the port at the mouth of the Miami River had to pass around Cape ...
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Case study - Tarrant Regional Water District (TRWD)
Service: Electromagnetic Testing Client: Tarrant Regional Water District (TRWD) Type of Pipelines: Transmission Mains Diameter: 72, 84 and 90-inch Pipe Material: PCCP Length: ~1 mile The Tarrant Regional Water District (TRWD) is a raw water supplier that serves ten counties in north central Texas. Most of the 1.5 million people served by the District are in Tarrant County, which includes Fort ...
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Case study - Man-Made River Authority (MRA)
Service: SoundPrint® AFO Client: Man-Made River Authority Project Date: Ongoing since 2004 Location: Ajdabiya, Libya Type of Pipelines: Raw Water Transmission Mains Diameter: 158-inch (4 meter) Pipe Material: PCCP Length: 1,200 km Results: 35,000 wire breaks as of 2011 Libya's Man Made River With more than 4,000 km of mainly four-metre diameter prestressed concrete cylinder pipe (PCCP) in ...
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Who says you need multiple wire breaks for a PCCP pipe to fail?
Abstract On Sunday, October 5, at about 2:30 a.m. a section of 72-inch prestressed concrete cylinder pipe (PCCP) failed. The 72-inch-diameter PCCP was nominally capable of sustaining an internal pressure of 281 psi. Previous examinations of the pipeline, utilizing the best available nondestructive examination techniques, provided little indication that this pipe section was at risk of failure. ...
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Pipeline infrastructure renewal at Miami-Dade Water & Sewer Department
Abstract Various governmental, professional and private studies have shown that the replacement costs of underground pipeline infrastructure is excessive and that best practice approaches for infrastructure risk management promote condition assessment programs to understand the actual condition of individual pipe sections in order to best allocate limited capital replacement and rehabilitation ...
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Pure Technologies And Wrc Unite For Leak And Gas Pocket Survey On Critical Main For Irish Water And Cork County Council
“The project was an excellent example of working in concert through every aspect of the planning stage, with everyone invested in a successful outcome…” The first time new parties come together to work on a pipeline inspection project, they face a lot of pressure to perform. The team must instill trust and understand each other to ensure the project goes off without a hitch. ...
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Case study - Baltimore City public works intervenes on pipe section about to fail
Service: SoundPrint AFO Client: Baltimore City Project Date: 2012 Location: Baltimore, MD Type of Pipeline: Water Transmission Main Diameter: 54-inch (1350mm) Pipe Material: PCCP Baltimore City features 130 miles of Prestressed Concrete Cylinder Pipe (PCCP), 15 percent of which is Class IV PCCP installed in the 1970s. This particular class of pipe has been prone to early failures across the ...
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Case study - Woodroffe Avenue Transmission Main - Ottawa, Ontario
Service: SoundPrint AFO PureRobotics Client: City of Ottawa Project Date: 2011 Location: Ottawa, Ontario, Canada Type of Pipeline: Water Transmission Main Diameter: 48-inch (1200mm) Pipe Material: PCCP The Woodroffe Avenue Transmission Main in Ottawa, Ontario experienced a major failure in January 2011 which opened a large hole across three traffic lanes causing major traffic disruptions. Pure ...
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Case study - City of Rockville - Robotic Pipeline Inspection
Service: PureRobotics - Robotic Pipeline Inspection Client: City of Rockville Project Date: July 2010 Type of Pipeline: Water Transmission Main Diameter: 24-inch Pipe Material: PCCP Length: 53,000 feet Results: 3 pipe sections identified at risk Insertion of Pipeline Inspection Robot Pure Technologies (Pure) was contracted to provide robotic pipeline inspection of a critical 24-inch prestressed ...
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Birmingham Water Works Board Leak Detection Program case study
Service: SoundPrint AFO Client: Baltimore City Project Date: 2012 Location: Baltimore, MD Type of Pipeline: Water Transmission Main Diameter: 54-inch (1350mm) Pipe Material: PCCP Baltimore City features 130 miles of Prestressed Concrete Cylinder Pipe (PCCP), 15 percent of which is Class IV PCCP installed in the 1970s. This particular class of pipe has been prone to early failures ...
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True Partnership: “It’s like pure is a true extension of our staff team—that’s what makes their relationship with WSSC work so well”
The best relationships are built on trust and responsiveness. Collaboration between The Washington Suburban Sanitary Commission (WSSC) and Pure Technologies began in earnest nearly a decade ago, and continues today as the two partners work together as one unified team to ensure the overall health of WSSC’s extensive large diameter water main network. The Washington Suburban Sanitary ...
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Case study - The City of Calgary completes successful condition assessment and verification on C303 Pipeline
Service: PureRobotics Client: City of Calgary Project Date: May 2013 - ongoing Location: Calgary, AB Type of Pipeline: Water Transmission Main Diameter: 30-inch (750mm) Pipe Material: Bar-Wrapped Pipe The City of Calgary provides water and wastewater services for over 1 million people in the Greater Calgary area. For many municipalities, accurate and regular condition assessment of ...
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Looking for Clues: Hamilton Demonstrates Value of Condition Assessment Program During Investigation of Critical Watermain
In late 2015, the City of Hamilton, Pure Technologies (Pure) and Robinson Consultants worked together to perform an external investigation of a pipe section in the Woodward Greenhill Transmission Main (WGTM) to gain understanding of what was causing degradation in a specific geographical area. A 2014 condition assessment performed by Pure had identified a cluster of damaged pipes on the WGTM, ...
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A Monster Pipe Demands Monster-Size Inspection Approach
From a purely visual perspective, some pipeline inspections are more awe-inspiring than others. This is especially true when everyone involved describes the pipe diameter as “monster-size,” clocking in at 210 inches in diameter. A challenge of this magnitude requires fresh thinking from an inspection approach, especially when the subject pipe is so critical to the lifeblood of the ...
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What makes high-risk pipelines deteriorate to a state of failure?
According to AWWA's 2016 Benchmarking Survey, the average water and wastewater utility has seven breaks per 100 miles of piping every year. Tip-top systems experience just four breaks in that distance, while those at the bottom have 18. While it’s interesting to note the difference in break rates, it’s unfair to compare one utility to another, as a multitude of factors come into play ...
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Optimized Pipediver Platform Making Waves As Advanced Condition Assessment Tool For Metallic Pipes
Pure Technologies (Pure) never says no to an engineering challenge. If a client has a particular pipeline assessment or monitoring challenge to overcome in order to make a rehabilitation decision, we’ll do whatever it takes to help our clients solve the problem. Pure Technologies embraces research and development (R&D), with a strong dedication to continually develop new technologies ...
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