Abstract: In view of the pipeline vibration problem of a certain domestic LNG plant, it is found that the pipeline vibration of the plant is regional, multiple and posterior; there is large kinetic energy in the vibration area and the vibration area is far away from the traditional vibration source. Using the methods and principles of the British HSE EI Guide and combining with the characteristics of the pipeline vibration of the plant, the vibration source is locked in the fluid-induced turbulence caused by the support lifting, resulting from uneven settlement. Then the problem of pipeline vibration of the plant is solved successfully. This case study provides reference and suggestions for the design of LNG plant pipeline and the treatment of on-site pipeline vibration problems.

Key words: liquefied natural gas/LNG, vibration, fluid-induced turbulence