An Overview of the Evolution of Degradation Mechanisms for Leaks in Metal Pipes and Joints and the Effectiveness of LLM and LMD Methods

Alaa Agala, Muhammed Khan, A. Starr
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Abstract

Leakage detection and localization in pipelines has become an important aspect of water management systems. Since monitoring leakage in large-scale water distribution networks (WDNs) is a challenging task, the need to develop a reliable and robust leak detection and localization technique against degradation mechanisms is essential for loss reduction in potable networks. This paper presents a review of all the past relevant investigations to demonstrate the effectiveness and limitations of the existing leakage detectionmethods (LDMs) and leakage localization methods (LLMs) in the context of those degradation mechanisms that are inevitable in pipes and joints. We find that extensive research efforts have been reported in relation to leakage detection and localization technologies. However, very little discussion is available to justify the suitability of a leakage detection method for a given degradation mechanism. The existing review papers do not cover or connect past efforts from the start of a degradation mechanism that leads to changes in the mechanical strength (such as a reduction in fracture toughness) of pipes and results in crack propagation and leakage. In this paper, we provide discussion of all these interrelated and inter-dependent stages. Using this discussion, the effectiveness of existing LDMs and LLMs in respect of prominent degradation mechanisms is analysed and the key challenges in the current methods are highlighted.
金属管道和接头泄漏退化机制的演变及LLM和LMD方法的有效性综述
管道泄漏检测与定位已成为水管理系统的一个重要方面。由于监测大型配水网络(wdn)的泄漏是一项具有挑战性的任务,因此开发可靠且强大的泄漏检测和定位技术对于减少饮用水网络的损失至关重要。本文回顾了所有过去的相关研究,以证明现有的泄漏检测方法(ldm)和泄漏定位方法(LLMs)在管道和接头中不可避免的退化机制的背景下的有效性和局限性。我们发现,有关泄漏检测和定位技术的广泛研究工作已被报道。然而,很少有讨论证明泄漏检测方法对给定降解机制的适用性。现有的评论论文没有涵盖或联系过去的研究,从导致管道机械强度变化(如断裂韧性降低)的退化机制开始,并导致裂纹扩展和泄漏。在本文中,我们提供了所有这些相互关联和相互依存的阶段的讨论。利用这一讨论,分析了现有ldm和llm在突出降解机制方面的有效性,并强调了当前方法中的关键挑战。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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