pressure pipe Articles

  • Leak behaviour in pressurized PVC pipes

    The correct definition of the leak law, i.e. the relationship between the leak outflow, the total head at the leak and other relevant parameters such as the pipe material, can seriously affect the accuracy of the numerical models used for the management of water distribution systems, either if they are used to forecast the leakage reduction by pressure management or to locate and size the leaks ...


    By IWA Publishing

  • Evaluating the pressure-leakage behaviour of leaks in water pipes

    Much progress has been made over the last decade in understanding the behaviour of flow through leak openings with changes in water mains pressure. In particular it has been established that variations in leak areas with pressure is the main factor responsible for the range of leakage exponents observed in practice, and several numerical and experimental studies have investigated this ...


    By IWA Publishing

  • Custom Pressurized Plastic Pipe Disposal Solution - Case Study

    Problem A large petro chemical company asked Waste Control Systems to solve a problem of pressurized plastic pipe after it had been tested for bursting strength. The QA test consisted of taking an eighteen inch section of pipe and welding caps on each end. One cap was solid and the other consisted of a fitting to allow air to be pumped into the section of pipe. A check valve was ...


    By Waste Control Systems Inc

  • Characterising the pressure-leakage response of pipe networks using the FAVAD equation

    This study investigated the feasibility of characterising the pressure-leakage response of water distribution systems using the FAVAD (Fixed and Variable Area Discharges) equation, instead of the conventional N1 power equation. The study was based on 300 network models with randomly distributed leaks and 35 networks generated through a sensitivity analysis. It was found that the leakage rate ...


    By IWA Publishing

  • Deal With The Pressure - Protect piping system components with Pulsation Dampeners

    Metering pumps with operating pressures of up to 150 psig (pounds per square inch gauge) can create unwanted pressure pulsations within a piping system – a real problem in applications such as filling, mixing and spraying that require a combination of a metering pump’s accuracy and a continuous flow. But the issue can often be addressed with Pulsation Dampeners.The Pulsation Dampeners, usually ...


    By Lutz-JESCO America Corp.

  • Pressure-loss computation procedures for non-Newtonian pipe flow

    Wastewater sludge with solids concentrations above about 2 percent exhibit non-Newtonian behavior, i.e., the sludge apparent viscosity changes with the shear rate (flow velocity). To determine pipeline head loss for sludge streams to and from anaerobic digesters, samples of primary, secondary and digested sludge were collected from Orange County Sanitation District Plant No. 1 and analyzed to ...

  • Quadratic approximations for pipe friction

    This paper develops quadratic approximations to the classical models of Darcy–Weisbach and Hazen–Williams for frictional head loss in water pipes. Key elements of the technique are selecting the approximation domain and minimizing the relative error. A comparison for individual pipes over a range of diameter, roughness, and Reynolds number showed that the approximation provides ...


    By IWA Publishing

  • Preventing & Thawing Frozen Pipes

    A “how-to” guide on preventing and thawing frozen pipes. As temperatures drop below freezing around the country, it’s important to be informed of the cold weather’s effect on your water pipes. When temperatures are below freezing, pipes in unheated areas are subject to freezing causing messy, and often expensive issues. Just one burst pipe running at 4-8 ...


    By WaterSignal

  • Optimizing DMAs' formation in a water pipe network: the water aging and the operating pressure factors

    Dividing a water distribution network (WDN) into district metered areas (DMAs) is the first vital step towards pressure management and real losses reduction. However, other factors of water quality such as the water age must be taken into account while forming DMAs. The current study uses genetic algorithm (GA) optimization methods to achieve the desired WDN segmentation conditions in terms ...


    By IWA Publishing

  • A multi-step genetic algorithm model for ensuring cost-effectiveness and adequate water pressure in a trunk/limb mains pipe system

    A water distribution network is the most expensive component of a water supply system; consequently, the overall planning, installation, and rehabilitation processes should be implemented accurately and carefully. The main issue that developing countries are facing is how to optimize the distribution network to meet increasing water demand. To tackle the issue, this paper proposes a new concept ...


    By IWA Publishing

  • Everything Depends on Pressure And Maintenance

    Energy and cost efficiency of biological treatment plants Every biologically working sewage plant needs a compressed air station for the oxygen supply of the aeration basin. This station only works at the highest possible energy efficiency level if excessive plant pressure through the subordinated system, excessive intake temperatures due to insufficient aeration and deaeration, and ...

  • Measuring Pressure and Vacuum Correctly

    Pumps and systems are installed, started, operated, and many times, forgotten. When a problem arises, it’s recommended to install a discharge pressure gauge and suction vacuum gauge on the system. These gauges should be installed near the suction inlet and discharge outlet of the pump. These gauges are usually installed properly, recorded, and along with a pump speed measurement can be ...


    By Gorman-Rupp Co.

  • PPR pipe fitting mold, PPR pipe mold, PPR mold

    PPR pipe fitting mould  PPR pipe fitting is specially for water supplying piping system, the connection of the fitting with the pipe has 3 different types. 1. gluing type. 2. welding type. 3. screwing type. Based on the function, we divided the PPR pipe fitting mould into below 4 different types. ...


    By Focare Mould Co.,Ltd.

  • Installing and Gluing Flexible PVC Pipe

    Installing and Gluing PVC Flexible (Flex) Pipe In order to get a proper bond and create a full, permanent seal when installing PVC Flex Pipe we have several suggestions. If you abide by these simple instructions you can minimize problems, leaks, and system failures! Ensure the pipe is clean and dry. Wipe away any dirt or dust and water. Use a PVC Primer on the ...


    By Red Flag Products

  • Hydrostatic Pressure Test

    A hydrostatic test is performed to determine the integrity and soundness of pressure vessels and piping joints. A decrease in the applied pressure or leakage through the products or joints or plastic deformation or distortion or bulging in the product is indication of inadequate quality of the product under test.   This test method is also termed as Leak testing (based on ...

  • Pressure Tank sizing

    Sizing a Pressure Tank with a CSV Cycle Stop Valves utilize a very small pressure tank. A 4.4 gallon size pressure tank is all you need for any size house.  “The larger the pressure tank the better”, is no longer true. Water does not come from the ...


    By Cycle Stop Valves, Inc.

  • Installation of Large Diameter Buried Pipes

    The ProblemThere is an ongoing need to provide designers, specifiers, engineers, consultants and students an overview and general understanding on the proper installation and rehabilitation of buried municipal and industrial pipelines to provide a long-lasting wastewater and potable water infrastructure that will serve future generations. Goals and ObjectiveMost buried ...

  • plastic pipe fitting mold technology

    “ Forever care you, care your molds”, is our insist mentality philosophy. We insist on mold construction design and steel quality, believe these two factors are main points to achieve mold with excellent performance. produces moulds for PVC ...


    By Focare Mould Co.,Ltd.

  • Feedwater pipe thinning - Case study

    Purpose Advise owners and operators to inspect and test intermediate temperature feedwater piping for internal wall thinning. Problem While not common, pipe wall thinning has been found in areas of turbulent flow in feedwater piping at intermediate temperatures. In at least one case, severe wall thinning to failure occurred downstream of a feedwater chemical ...


    By Babcock & Wilcox MEGTEC LLC

  • Plugging `hot` pipes in extreme environments

    Some of the world's most intricate infrastructure is found in power plants, chemical plants, refineries, and other factories that use and combine industrial chemicals. The piping for fuel, chemical transport, water supply, and cooling needs is typically very complex and subject to high temperatures and pressures. And since plants are harsh environments, it's a given that piping needs regular ...


    By Petersen Products Company

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