PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 469–476

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Structural Health Monitoring of Cold Water Pipeline in Desalination Plants Using Fiber Bragg Grating Sensor T. Ramya a,* , G. Dhinesh a , S.V.S Phani Kumar a a Ocean structures department,National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai, Tamil Nadu, India Abstract Early detection of cracks bends and deformities occurring in on-shore and off-shore pipelines is important to avoid entire breakage of those pipes. This paper is focused on monitoring health of pipelines that transfer water between the ocean and desalination plants. The proposed methodology is based on a fiber optic sensing mechanism namely Fiber Bragg Gratings (FBGs) to sense deformation in pipelines by continuously measuring parameters such as strain and temperature at regions of interest. High Density Poly-Ethylene (HDPE) pipes tend to develop crack under stress. The High Thermal Expansion Co-efficient (TEC) of 6 x10 -5 1°C to 11 x10 -5 1°C needs to be taken into account when designing the health monitoring system for this pipeline structure. The proposed system makes use of FBGs that are to be placed at locations where continuous monitoring of strain and temperature is required. This innovative approach enables real-time monitoring, facilitating prompt maintenance and preventing pipeline failures. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers

Keywords: Fiber Bragg Grating; High-Density Poly-Ethylene (HDPE) pipe; Strain; Temperature;

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* Corresponding author. Tel.: +91-7904172438 E-mail address:tramyaece@gmail.com

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.079