长输天然气管道干线截断阀异常关断事件分析及处理

Analysis and Treatment of GOV Abnormal Shutoff in Long Distance Natural Gas Pipelines

干线截断阀在长输天然气管道中运用十分广泛,近年来由Shafer气液联动机构失效导致的干线截断阀异常关断事件时有发生,对长输天然气管道平稳运行造成重要影响。基于此,在介绍干线截断阀组成结构和动作原理的基础上,选取典型案例探讨干线截断阀关断事件原因及其处理要点,最后并提出相应的干线截断阀维检修建议。

GOVs are widely used in long distance natural gas pipelines; however GOV abnormal Shutoff caused by Shafer pneumatic hydraulic actuator failure often occurs in recent years, which has a significant influence on stable running of long distance natural gas pipelines. In this paper, focusing on GOV abnormal shutoff, the composition structure and action principle of GOV were introduced. Then through selecting a typical case, reasons and treatment measures of GOV abnormal shutoff were discussed. At the end, some maintenance suggestions were put forward.