Effect of slug flow on pipe vibration in horizontal pipeline

The vibration characteristics of the pipeline in gas liquid flow are investigated in this paper. The pipeline vibration which responds to pressure sensors and 3D laser measurement was analyzed. It shows that pipeline vibrations decrease in severe slug flow when gas flow rate increases and liquid flow rate keeps a constant. But when liquid flow rate increases and gas flow rate keeps a constant, at the first stage, the vibration increases and is up to a max amplitude, especially, in the slug flow. At the second stage, the amplitude of pipeline vibration decreases but the vibration frequency increases.