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中俄东线天然气管道北段投产特点与实践经验
Commissioning characteristics and practical experience of north section of China–Russia Eastern Gas Pipeline
中俄东线天然气管道工程
; 投产; 大口径; 高寒; 经验总结China&ndash
; Russia Eastern Gas Pipeline Project; commissioning; large-diameter; alpine; experience summary中俄东线天然气管道因口径大且处于高寒地区,使其投产过程出现了一些与以往输气管道投产不同的现象及特点,产生了一些新的投产经验。对于大口径天然气管道,为了缩短投产时间,减轻现场人员作业强度,可以在确保天然气与空气不直接发生接触的前提下,提高干线注氮速度;在确保不会因氮气速度过小而产生层流的前提下,站场并列管道及双管敷设管道宜采用同时置换的方式。此外,在干线注氮封存长度、设备低温整体试验、站场容积较大的预留盲管段排气阀设置、阀室气头检测方法、大口径调压橇安全截断阀开启方式、站场单独进行天然气置换时流量控制等方面提出了具有实际工程意义的做法,并在中俄东线天然气管道投产实践中证实了其有效性。
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