Experimental Study on Leak Detection of LNG Cryogenic Pipelines

Traditional leak detection methods often suffer from reduced sensitivity and increased false alarm rates in cryogenic environments. This paper investigates and compares multiple leak detection technologies, selecting distributed fiber optic sensing technology to conduct experimental research on its feasibility for LNG pipeline leak monitoring. The results demonstrate that distributed fiber optic sensing technology offers advantages including high positioning accuracy, rapid response, speed, significant monitoring effectiveness, and excellent system stability and anti-interference capabilities, making it suitable for LNG pipeline leak detection. Based on the experimental findings, targeted recommendations are proposed for the application of distributed fiber optic online monitoring technology in LNG cryogenic pipelines, covering design, deployment strategies, and structural optimization.