Pipe Testing Articles

  • EPA Proposes Two Test Methods and Guidance for Evaluating Antimicrobial Pesticides

    The U.S. Environmental Protection Agency (EPA) has recently announced the availability of two proposed test methods and associated testing guidance for evaluating antimicrobial pesticides against two biofilm bacteria, Pseudomonas aeruginosa and Staphylococcus aureus, for comments.  EPA states that registrants of antimicrobial products with public health claims are “required to submit ...


    By Bergeson & Campbell, P.C.

  • Deutsche Bahn, Germany - Deutsche Bahn uses Sialex to help control costs at its Mainz facility Case Study

    Deutsche Bahn (DB) has employed Sialex-Rings to control “Scale and Corrosion” in the offices water infrastructure, at their facility in Mainz, Germany Since 2007. After several years of escalating maintenance costs associated with dealing with the results of “hard” water, DB considered two options; an expensive “water softener” option or an environmentally ...


    By Phoenix Ring Manufaktur UG

  • Robot Device for Pipe Inspection - Case Study

    In 2005, Pure Technologies (Pure), a provider of various structural monitoring and leak-detection technologies, set about to develop a pipeline assessment tool that could monitor and report on the condition of pre-stressed concrete cylinder pipes (PCCP) utilized in municipal water and sewer systems. The tool’s competitive advantage would be accurate assessment decoupled from the need to ...


    By Pure Technologies

  • Multiple-fault detection in water pipelines using transient-based time-frequency analysis

    Pipe faults, such as leakage and blockage, commonly exist in water pipeline systems. It is essential to identify and fix these failures appropriately in order to reduce the risk of water pollution and enhance the security of water supply. Recently, transient-based detection methods have been developed for their advantages of non-intrusion, efficiency and economics compared to traditional ...


    By IWA Publishing

  • Field Performance Testing for Pipeline Pumps

    Significant energy savings can be achieved by optimizing pump operating efficiency. Measuring the exact pump performance with crude oil under realistic conditions in the field is the first step towards improving the pump efficiency in the future. About 20 billion barrels of crude oil were transported through pipelines in 2015. Around the world, there are over one million kilometers of ...


    By Sulzer

  • Valuing information for sewer replacement decisions

    Decision-making for sewer asset management is partially based on intuition and often lacks explicit argumentation, hampering decision transparency and reproducibility. This is not to be preferred in light of public accountability and cost-effectiveness. It is unknown to what extent each decision criterion is appreciated by decision-makers. Further insight into this relative importance improves ...


    By IWA Publishing

  • Survival of pathogens in drinking water plumbing systems: impact factors and sanitation options

    The objective was to determine impact factors that would allow Pseudomonas aeruginosa and Legionella pneumophila to survive sanitation measures of household drinking water systems. Therefore, different disinfectant concentrations were tested under different operating conditions in close-to-practice experiments. Particular attention was paid to the viable but non-culturable ...


    By IWA Publishing

  • Case study - G210 verifies piped medical gases

    Report in the Medical Gas Association newsletter Consultation with medical gas quality controllers (QCs) to optimise specification has lead to, "A major improvement in portable instrumentation for the analysis of medical gases," according to Ed Doyle QC (MGPS). He reported in the August 2010 issue of the Medical Gas Association (www.mga.org.uk) newsletter on his experience with the new ...


    By Geotech

  • Flint Michigan Water Crisis

    The situation in Flint Michigan has been steadily deteriorating and there’s still some time before experts predict an end in sight. It’s reached the point where celebrities such as Cher and Pearl Jam have donated water or money for the affected towns and people living in them. But what exactly happened? In April 2014, it was decided by a ...


    By Partech (Electronics) Ltd.

  • Accepted Inspection Methods of Process Sewers.

    During the process of refining there is discharge of hazardous waste, this coupled with aging pipeline infrastructure creates a potential where waste can leak into the environment posing catastrophic threats to life. Federal agencies such as the EPA are beginning to penalize refineries that do not take necessary measures of disposing their waste. These refineries are subject to ...


    By EnTech Engineering, Inc

  • 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 ...


    By Pure Technologies

  • Quantitative pipe condition assessment with Pipe Penetrating Radar

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (reinforced concrete, vitrified clay, PVC, HDPE, etc.) pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids ...


    By SewerVUE

  • Water insecurity in Indigenous Canada: a community-based inter-disciplinary approach

    Water insecurity in Northern Indigenous communities in Canada remains a pressing problem, with multiple dimensions and health impacts. We carried out a case study of long-term water insecurity in the Southern Inuit island community of Black Tickle, Labrador, where there is no piped water and people rely on an under-funded potable water dispensing unit (PWDU) and unmonitored water sources. Our ...


    By IWA Publishing

  • A stochastic approach for extended partial blockage detection in viscoelastic pipelines: numerical and laboratory experiments

    Partial blockages in water pipe networks may contribute to large energy dissipation throughout the system and reduce service effectiveness for customers. In this paper, a recently developed stochastic model using transients for detecting partial blockages in water pipelines is tested and numerical and experimental case studies are presented. The model is a stochastic successive linear estimator ...


    By IWA Publishing

  • The role of balancing tanks in optimal design of water distribution networks

    Optimisation and reliability assessment of water distribution networks are complicated processes. Most of the research focuses only on the pipes without considering other network components, such as tanks. Despite the benefits that the tanks may bring, they are usually omitted in the optimisation process or in reliability considerations. Various indices from the literature that describe network ...


    By IWA Publishing

  • Impact of incomplete mixing in the prediction of chlorine residuals in municipal water distribution systems

    This paper investigates the mixing phenomena in pipe junctions in water distribution systems. Network simulation models frequently assume that mixing at pipe junctions is complete and instantaneous. In the present study, a series of experiments using tee and cross junctions with varying inflows and free chlorine concentrations were carried out in the Hydraulic Laboratory of the Institute of ...


    By IWA Publishing

  • Water-related factors and childhood diarrhoea in African informal settlements. A cross-sectional study in Ouagadougou (Burkina Faso)

    Improved access to water is a key factor in reducing diarrhoeal diseases, a leading cause of death among children in sub-Saharan Africa. In terms of water access, sub-Saharan African cities are some of the worst off in the world, with 20% of populations supplied by an unimproved water source. This situation is even worse in informal settlement areas. Using cross-sectional data on access ...


    By IWA Publishing

  • Anomaly pre-localization in distribution–transmission mains by pump trip: preliminary field tests in the Milan pipe system

    In this paper, the reliability of transients due to pump trip as a powerful tool for the pre-localization of anomalies in real pipe systems is tested. The examined pipe system is part of the one supplying the city of Milan, Italy and is managed by Metropolitana Milanese SpA (MM). The characteristics of such a system can be considered as intermediate between those of classical transmission mains ...


    By IWA Publishing

  • The cleaning method selected for new PEX pipe installation can affect short-term drinking water quality

    The influence of four different cleaning methods used for newly installed polyethylene (PEX) pipes on chemical and odor quality was determined. Bench-scale testing of two PEX (type b) pipe brands showed that the California Plumbing Code PEX installation method does not maximize total organic carbon (TOC) removal. TOC concentration and threshold odor number values significantly varied between ...


    By IWA Publishing

  • Improving the rapidity of responses to pipe burst in water distribution systems: a comparison of statistical process control methods

    A pipe burst is a major water distribution system failure. Water escapes the network through the break increasing the total flow entering the network. These higher flows, in turn, increase the head losses in pipes and result in lower water pressures at customer taps. This study focuses on burst detection by seeking to identify anomalies in net system demand, pipe flow rates, and nodal pressure ...


    By IWA Publishing

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