Pipe Testing Articles

  • Study on the impacts of peaking factors on a water distribution system in Germany

    This paper aims to explore the impacts of peaking factors on a water distribution system designed for a small city in Germany through model-based analysis. As a case study, the water distribution network was modelled by EPANET and then two specific studies were carried out. The first study tested corresponding system-wide influences on water age and energy consumption if the peaking factors used ...


    By IWA Publishing

  • The effect of the surface-to-volume contact ratio on the biomass production potential of the pipe products in contact with drinking water

    The biomass production potential (BPP) test is a semi-static test for assessment of microbial growth promoting properties of construction products in contact with drinking water (CPDW). In 2003 the test was selected for incorporation into a scheme for acceptance of CPDW in the framework of implementation of the European Construction Product Directive and Drinking Water Directive. The pass/fail ...


    By IWA Publishing

  • Latex Paint Manufacturer-1

    The paint manufacturing facility was using 1 MGD of fresh water in the manufacturing process with a majority of the water being used for tank and pipe cleaning. As a cost cutting measure, the facility wanted to reduce the water consumption and reuse part, if not all of the wastewater. They tried several different combinations of coagulants and flocculants with limited success. Integrated ...


    By Integrated Engineers Inc.

  • Analysis of gamma ray incoherent scattering for non-destructive testing

    An approach for the analysis of gamma ray incoherent scattering on free and binding electrons is presented for Non-destructive Testing (NDT). The method is based on computational simulation and backscattering gamma ray measurements for carbon steel walls. The results of thickness measurements for steel walls are described by the theory of the energy transfer model.Keywords: gamma ray incoherent ...


    By Inderscience Publishers

  • Case Study: Mt. St. Mary`s College

    Mount St. Mary's College is another major university/college that continues to retain Ellis for its environmental testing/consulting needs. Recently, Ellis administered the removal of asbestos pipe insulation prior to re-plumbing a five-story student residence. This included coordinating the abatement contractor's schedule with that of other trades working ...

  • New InfoWorks tool offers easy capacity checking for water systems

    InfoWorks WS provides invaluable tools for checking that water supply systems can cater for any additional demands they might face. A new run-type in the latest versions, called Forced Fire Flow, is designed to check the system’s capacity for providing a specified flow at a particular point. Its application is not confined to fire flows - it can also be used to determine whether any additional ...


    By Innovyze

  • Infoworks WS offers choice of approaches to regional modeling

    InfoWorks WS incorporates innovative features that offer great flexibility for the regional modeling of water supply systems. A choice of approaches enables a utility to model all or part of its region, and to merge models with neighboring areas for emergency planning purposes. The software is packed with tools to aid the modeling and joining of whole or part networks. The range of options has ...


    By Innovyze

  • New InfoWorks tool offers easy capacity checking for water systems

    InfoWorks WS provides invaluable tools for checking that water supply systems can cater for any additional demands they might face. A new run-type in the latest versions, called Forced Fire Flow, is designed to check the system’s capacity for providing a specified flow at a particular point. Its application is not confined to fire flows - it can also be used to determine whether any additional ...


    By Innovyze

  • The challenges of creating a 250,000-pipe model for Miami-Dade

    Earth Tech has used InfoWorks WS to develop a record-breaking all-mains model of Miami-Dade’s water supply system in order to achieve an accurate representation of the entire distribution process. The new dynamic model covers the whole of the 250,000-pipe network, as well as all the associated facilities. 'One of the challenges was that we had to model the whole system - every single pipe,' says ...


    By Innovyze

  • ESFR Sprinkler Protection of Class II Commodity in Cold Storage Warehouses using Propylene Glycol Antifreeze Agent

    Currently, the NFPA standard for the installation of sprinkler systems (NFPA 13) requires that early suppression fast response (ESFR) sprinklers be specifically listed for use with antifreeze mixtures due to the concern that antifreeze will contribute to the combustion energy of the fire. The effectiveness of an ESFR sprinkler system in suppressing a fire depends on the antifreeze concentration, ...


    By SAGE Publications

  • A conceptual decomposition of MINLP models for the design of water-using systems

    The work presents a systematic methodology for the design of industrial water systems that combines principles of water-pinch (Wang and Smith, 1994a, 1994b) with mathematical programming techniques that enable the imposition of practical constraints and the generalisation of the conceptual tools into multi-contaminant problems. A superstructure model is formulated as an MINLP and solved via ...


    By Inderscience Publishers

  • Sewer-Main Collection Pipe Joint Infiltration Testing and Life Cycle Cost Analysis

    ABSTRACTResearch ProjectsMajor members of the sewer-main pipe manufacturing industry and the University of Houston have completed and published the results of the following two research projects: The Sewer-Main Collection Pipe Joint Infiltration Testing research project that measured the water infiltration rate of water-tight designed 30-inch pipe joints. The joint tightness testing was ...

  • Biological water treatment effective in Saddle Lake

    Three transparent pipes connected to a network of hoses and gauges stretch from the floor to the 14-foot ceiling in a back room of the Saddle Lake water treatment plant. Water burbles through the pipes, mixing with a material that looks like black sand. The particles are actually expanded clay aggregates that provide the surface needed for water-cleaning bacteria to live on. The bacteria remove ...


    By Filtralite - Leca Norge As

  • 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. ...


    By Inderscience Publishers

  • Small Diameter Pipe Wipe Sampling for PCBs: Technology Review and Status of EPA Approval

    ABSTRACT The Toxic Substances Control Act (TSCA) regulations governing management of polychlorinated biphenyls (PCBs) in the electric and gas industry include a series of options for abandoning pipe in place and managing pipe removed for disposal. The management options available to owners are different and, in some respects, more stringent for pipe that is less than or equal to 4 inches in ...


    By Weston Solutions, Inc

  • Experimental investigation on the efficiency of a high side weir overflow

    ABSTRACTMost of the overflow structures in Flanders are 'high side weir overflows'. For the design of these structures British guidelines are used. However, the design conditions for sewer systems in the U.K. differ from the Flemish design conditions. In Flanders, pressurised flow is in common use in the pipes of the sewer system. That is why tests have been carried out on a scale model of a ...


    By IWA Publishing

  • Effect of Rib Spacing on Deformation of Profile-Wall Plastic Pipes Buried in Coarse Granular Backfill

    Several different types of plastic pipe products were instrumented, buried in coarse granular backfill, and subjected to monotonic, distributed load in the field. During each field test, data were recorded from strain gages, linear variable differential transformers, and earth pressure cells by computerized data acquisition units.Review of the deflection data from 14 tests revealed a pattern on ...


    By ASTM International

  • Centrifuge Testing of Fixed-Head Laterally Loaded Battered and Plumb Pile Groups in Sand

    Centrifuge tests were conducted on driven in-flight fixed-head plumb and battered 3 × 3 pile groups at three-diameter (3D) and five-diameter (5D) spacings. The piles simulated 430-mm-diameter by 13-m-long pipe piles founded in medium loose (Dr = 33%) and medium dense (Dr = 55%) sands. The battered groups were in an A frame arrangement, i.e., each pile in a given row battered the same. Results of ...


    By ASTM International

  • Impact-Echo Response of Hollow Cylindrical Concrete Structures Surrounded by Soil and Rock: Part I—Numerical Studies

    The studies summarized in this paper and the following paper in this issue demonstrate that the impact-echo method can be used for integrity testing of concrete pipes, mine shaft liners, and tunnel liners in contact with soil or rock. Results obtained from numerical (finite element) studies are presented in this paper (Part I), and results obtained from experimental studies on mine shaft liners ...


    By ASTM International

  • Time-Temperature Superposition in Mechanical Durability Testing of Polyethylene Geomembranes

    The mechanical durability of polyethylene geomembranes is considered in this technical note. Polyethylene plastic pipe research has shown that there are universal factors for shifting high-temperature failure (short time) data to low temperatures (long time). Data presented here indicate that these same shift factors may also apply to geomembranes. Crack growth rate studies are proposed as a ...


    By ASTM International

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