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清管作业是天然气长输管道投产前或运行中的一项重要作业,可保证管道的安全运行和输气效率。跨国天然气管道的清管作业不同于常规清管作业,其具有一定的复杂性和特殊性。介绍了中亚天然气管道在清管站设置、清管站工艺、清管器选型等方面与国内一般管道的不同之处,并以中亚天然气管道清管作业为例,对中亚天然气管道乌国段的清管工艺特点和清管经验以及跨国段管道清管作业的特点和关键要点进行了总结和解析,以期为后续跨国长输天然气管道的清管作业提供帮助。
Pigging operation is an important operation before or during operation of long-distance natural gas pipeline to ensure the safe operation and gas transmission efficiency of the pipeline. Transnational natural gas pipeline pigging operations is different from conventional pigging operations, which has a certain degree of complexity and specificity. This paper introduces the differences between Central Asia natural gas pipeline in the aspects of pigging station setting, pigging station technology and pig selection, and taking the Central Asian natural gas pipeline pigging operation as an example, The characteristics of the pigging process and the experience of pigging in the Uigur section as well as the features and key points of cross-national pipeline pigging operations are summarized and analyzed in order to provide assistance for the pigging operations of the subsequent long-distance natural gas pipeline.