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Asset Integrity Management of Critical Infrastructure
Editor
Mamdouh M. Salama
Mamdouh M. Salama
MMS4Aim LLC, USA
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Dragan Komljenovic
Dragan Komljenovic
Hydro-Québec, Canada
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Jovica R. Riznic
Jovica R. Riznic
Canadian Nuclear Safety Commission, Canada
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ISBN:
9780791887738
No. of Pages:
180
Publisher:
ASME
Publication date:
2024

Strain gauges provide valuable information about steel pipeline conditions during periods of increased stress. Implementing continuous strain gauge monitoring reduces uncertainty about the impact of stress on pipelines and helps pipeline operators minimize operational disruptions during strain inducing events, such as land movement or subsidence. Traditionally, strain gauge monitoring was limited to nonhazardous areas because the energized strain gauge monitoring equipment posed an ignition threat in hazardous locations, HazLocs. Emerging technology utilizes low-power, wireless, battery powered HazLoc Nodes to enable strain gauge monitoring at these classified locations. Through low power sensor board design and low gauge excitation voltage, intrinsic safety certification is achieved for continuous monitoring of asset integrity. This paper presents a case study on strain gauge monitoring in an active hazardous piping facility during differential ground subsidence induced by underground longwall mining. This case study shows how strain fluctuated on piping and associated equipment during and after longwall mine subsidence. The strain gauge monitoring and analysis notably included wireless data transmission, low-voltage battery power performance, and other factors that allowed for the system to remain operational during the subsidence. Additionally, this paper shows how strain relief techniques were leveraged to ensure asset integrity.

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