Field measurements demonstrate that safety valves effectively reduce pressure vibration in low-pressure pipelines, suggesting improved design through numerical analysis.
In this study, self-excited pressure vibration in low-pressure pipelines with pressure reducing valves was evaluated based on the results of field measurements of current issues and countermeasures by safety valves. As a result, it was found that installing a safety valve upstream of the pressure-reducing valve is effective. In addition, this study numerically models the function of safety valves, which are expected to be effective in suppressing pressure vibration in low-pressure pipelines. Furthermore, the reproducibility of the numerical model was verified by simulating the results of field tests conducted on a local pipeline where a safety valve was installed as a countermeasure against self-excited oscillatory pressure vibration. In addition, the relationship between the maximum pressure generated upstream of the pressure-reducing valve and the effective area of the safety valve was determined through numerical analysis to determine the optimal size of the safety valve.
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Fukumoto et al. (2025) studied this question.
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