A numerical model has been established in order to simulate the propagation of pressure waves in water networks. The present model formulation is based on a system of partial hyperbolic differential equations. This system has been solved via the characteristics method. The current model provides the necessary data and the necessary damping of water hammer waves, taking into account the structure of the pipe network and the pressure loss. The numerical algorithm estimates the maximum pressure values resulting from the water hammer when closing valves in the network and consequently, the maximum stresses in the pipes have been calculated. In the case of simultaneous closing of several valves, the over pressure can exceed the admissible pressure. In this case, the severity of a defect such as a corrosion crater (pit) has been estimated by computing a safety factor for the stress distribution at the defect tip. This allows the applied notch stress intensity factor to be obtained. To investigate the defect geometry effects, semi-spherical and semi-elliptical defects are deemed to exist in up to one-half of the thickness of the pipe wall. The outcomes have been introduced into the structural integrity assessment procedure (SINTAP) failure diagram assessment (FAD) in order to obtain the safety factor value. Conventionally, it is considered that a failure hazard exists if this safety factor is less than two.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Water pipeline failure due to water hammer effects


    Contributors:
    Schmitt, C. (author) / Pluvinage, G. (author) / Hadj-Taieb, E. (author) / Akid, R. (author)


    Publication date :

    2006


    Size :

    8 Seiten, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Estimation of water hammer speed in composite pipeline

    Sun, Chaofan / Pang, Su-Seng / Zhao, Yi et al. | Tema Archive | 1998


    Valve-Induced Water Hammer and Column Separation in a Pipeline Apparatus

    Karadzic, Uros / Bulatovic, Vladimir / Bergant, Anton | Tema Archive | 2014


    LNG ship liquid cargo pipeline water hammer protection system and method

    LIU LIXIA / LIU TAO | European Patent Office | 2023

    Free access

    Study on Liquid Pipeline Water Hammer and Protective Device with Gas Concentration

    Yong, Qi-Wei / Jiang, Ming / Tang, Yan | Tema Archive | 2012


    Effects of Water Hammer on Propulsion Systems

    Brindle, Bryce / Gilbert, Joshua / Moore, Jeffrey D. et al. | AIAA | 2016