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为了提高天然气计量检定站的安装精度与安装效率,减少安装过程中出现的错误,结合天然气计量检定站现场实际安装经验,对直管段安装、工艺管道吹扫试压及扫水等施工阶段进行分析,总结了天然气计量检定站建设期间施工工序的关键点:工作级与检定台位安装的关键在于直管道安装“0应力”及直管道、伸缩器的安装顺序;管道吹扫过程的关键是利用辅助工具吹扫DN300～DN600口径管道;管道试压过程应固定好伸缩器的锁紧螺丝;扫水过程需要注意的是作业坑的设计和管内游离水的排放.上述天然气计量检定站各施工工序关键点,可为同类计量检定站的建设提供理论参考.“,”In order to improve installation accuracy and efficiency and reduce errors during the installation of natural gas metrological verification stations,the key points were proposed in this paper for the construction process of natural gas metrological verification stations on the basis of practical installation experience.Such key points involve the installation of the straight pipe sections,and the purging,hydrostatic test and cleaning of process lines.As for the installation of working ends and verification benches,the key point is “zero stress” installation of straight pipe sections and the installation sequence of the straight pipe sections and expansion joints.The key point during pipe purging is to purge DN300-DN600 pipelines with auxiliary tools.The lock screws of expansion joints shall be fixed well in the process of pipeline hydrostatic tests.During pipeline cleaning,attention shall be paid to the design of operating pits and the removal of the free water out of the pipe.This paper provides theoretical reference for the construction of similar metrological verification stations.