April 2022, Vol. 249, No. 4


Application of Pipeline Cleaning Robot in Liquefied Natural Gas Pipelines

By Tai Yuan Chang, Assistant Chief Engineer, and Chuan Tse Hsiang, Assistant Chief Engineer, CTCI Corporation, and Fa Shian Chang, Professor of Electronic Engineering, Cheng Shiu University  Pipelines used to provide gas for the production of LNG use many butt-jointed valves. Similarly, when welding the valves, debris for grinding and welding spatter slag and dust will remain inside the pipes. Traditionally, pipes have been cleaned with in-pipe blowing technology, but that has been problematic because the method removes only 60% of the debris.   Much of the debris will still accumulate in the depressions, causing valve wear and leakage, which increases subsequent maintenance costs and red

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