pipeline condition Articles
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No Silver Bullet Technology For Pipeline Condition Assessment
For utilities with large-diameter networks, waiting for failures to occur before repairing or replacing highly critical mains is not an option. With a large amount of buried water infrastructure reaching the end of its service life, operators have every incentive to take a proactive approach to asset management. Nowhere is this more critical than in busy urban centres. The fallout from an ...
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Robotic Speed Demon Delivers 18,000 Feet Of Pipeline Condition Data In A Single Day
"We absolutely crushed our previous distance covered in a single day..." A growing number of proactive municipal utilities and power generating operators across North America are reaping the benefits of deploying the latest robotics crawler from Pure Technologies (Pure) to assess the condition of their pipeline networks and save millions of dollars in water loss and prevented breaks. Unlike ...
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Hydraulic transient wave separation algorithm using a dual-sensor with applications to pipeline condition assessment
Over the past two decades, techniques have been developed for pipeline leak detection and condition assessment using hydraulic transient waves (i.e. water hammer waves). A common measurement strategy for applications involves analysis of signals from a single pressure sensor located at each measurement site. The measured pressure trace from a single sensor is a superposition of reflections ...
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Wastewater Force Main Management – Pipe Wall Assessment
After completing a preliminary analysis and preliminary force main survey, operators can begin to do complete a more thorough assessment of their force main inventory. In the third of four posts about wastewater force main management, we look at the most effective method of pipe wall assessment. With over 400 miles of force main inspected, Pure’s has found that less than 10 percent of ...
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Wastewater Force Main Management – Pipe Wall Assessment
After completing a preliminary analysis and preliminary force main survey, operators can begin to do complete a more thorough assessment of their force main inventory. In the third of four posts about wastewater force main management, we look at the most effective method of pipe wall assessment. With over 400 miles of force main inspected, Pure’s has found that less than 10 percent of ...
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Wastewater Force Main Management – Pipe Wall Assessment
After completing a preliminary analysis and preliminary force main survey, operators can begin to do complete a more thorough assessment of their force main inventory. In the third of four posts about wastewater force main management, we look at the most effective method of pipe wall assessment. With over 400 miles of force main inspected, Pure’s has found that less than 10 percent of ...
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Model and experimental analysis of the dynamic behaviour of air conditioning plant pipelines
This paper presents a model to describe the transmission of vibrations through the pipelines of automotive air conditioning plants. It is known that vibration propagating from the compressor to the other system components can affect both acoustical and structural behaviour. In this study a frequency domain description is purposed, using a transfer matrix formulation to study the pipe dynamics. ...
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Rerating Pipeline Pumps
Pipeline operators transport billions of gallons of oil every year, and they are constantly looking at ways of improving efficiency and reducing costs. Depending on changing network demands, this might require managing an increase or decrease in flow rate in the pipeline, a change in pressure, or a pump upgrade to more efficient technology. Throughout the life of a pipeline, the process ...
By Sulzer Ltd.
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Transient frequency response based leak detection in water supply pipeline systems with branched and looped junctions
The transient frequency response (TFR) method has been widely developed and applied in the literature to identify and detect potential defects such as leakage and blockage in water supply pipe systems. This type of method was found to be efficient, economic and non-intrusive for pipeline condition assessment and diagnosis, but its applications so far are mainly limited to single and simple ...
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Pipeline Management Lessons: Old Isn’t Always Bad
Underground pipelines are among the most valuable, yet neglected assets in the public arena. They provide essential services such as the supply of drinking water and collection of wastewater. Despite their critical importance, for decades many municipal utilities have operated under a “bury and forget” mentality – with little emphasis on long-term management of their aging ...
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Development of wastewater pipe performance index and performance prediction model
Prediction/deterioration modelling is a crucial step in assessing the remaining service life for strategic management planning. Sound pipe performance evaluation models are essential for accurately predicting future performance. There is a lack of a performance evaluation tool which takes into consideration different factors such as pipe characteristics, internal and external environmental ...
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Small leaks matter
In the final part of the leak detection series, we explain why locating small leaks is and important part of a water loss management strategy. To see the first post in the series that outlines the problem of water loss in North America, click here. Many leak detection programs have a mandate to save the most water and focus on locating and repairing large leaks in favor of small leaks. However, ...
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Small Leaks Matter
In the final part of the leak detection series, we explain why locating small leaks is and important part of a water loss management strategy. To see the first post in the series that outlines the problem of water loss in North America, click here. Many leak detection programs have a mandate to save the most water and focus on locating and repairing large leaks in favor of small leaks. However, ...
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Application of high-resolution geophysical methods in submarine pipeline inspection
High-resolution marine geophysical equipment employed includes single beam echo sounder (SBES), multi-beam echo sounder (MBES), sub-bottom profiler (SBP) and side scan sonar (SSS). By employing SBES, the reflection curve in shallow water reveals the real condition of pipeline; while in deep water, the reflection or diffraction curve can't reveal the real condition. Compared with SBES, MBES is ...
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Underground, underwater, under stress: Town of Longboat Key puts SmartBall tool to unusual pipeline condition test
When much of your critical sewer pipeline lies buried under a bay of shimmering ocean water, the challenges required to assess its condition may seem daunting. That task faced the Town of Longboat Key, an affluent retirement community located on the barrier island of the same name off the west coast of Florida. Sensitive to environmental, health and safety issues, the Town has been concerned ...
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In-situ features of LNA and HNA bacteria in branch ends of drinking water distribution systems
The knowledge of bacteria with low or high nucleic acid (LNA or HNA, respectively) content was relatively limited in drinking water distribution systems (DWDSs). In the present study, LNA and HNA bacterial growth characteristics and effect of water physicochemical properties on these two subgroups were analyzed at the branch ends of a DWDS. The results showed that LNA bacteria were in the ...
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Evaluation of chlorine decay models under transient conditions in a water distribution system
Residual chlorine concentration decreases along distribution networks because of factors such as water quality, physical properties of the pipeline, and hydraulic conditions. Hydraulic conditions are primarily governed by transient events generated by valve modulation or pumping action. We investigate the impact of transient events on the rate of chlorine decay under various flow conditions. ...
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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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Debunking Murphy`s Law - Utilities address conditions to reduce risk of failure in aging metallic pipelines
According to an adapted Murphy's Law, "anything that can fail, will fail." While that universal engineering law has been proven true again and again, many utilities are working diligently to reduce the risk of failure by taking measures to improve the service life of their aging metallic assets. In North America, with the majority of water infrastructure reaching the end of its design life, ...
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The performance characteristics of rubber expansion joint
Rubber Expansion Jointsmainly use the unique properties of rubber , such as high flexibility, high air tightness, chemical resistance and radiation resistance , high strength , thermal stability and strong polyester composite ply bias with the candidate , by high pressure , crosslinked molded high temperature , the internal high density, can withstand high pressure , the elastic deformation ...
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