中乌天然气管道工程投产临时工程的影响因素分析

摘要

Because of the China—Uzbekistan natural gas pipeline B-line can't be delivered in time, the temporary engineering was built for gas substitution in 6# and 8#valve chamber. In the article, it analysizes the hydrate formation, temperature difference in throttling pro-cess,low temperature resistance of valve,pipeline vibration and flow control include.Based on the actual calculations result of displacement rate and the pressure changes of valve back, the flow rate has been controlled by adjusting. According to whether the heating equipment works and valves to be fixed,It is very important to improve the safety of gas purging,espe-cially it's helpful for pipeline operation.%中乌天然气管道B线由于首站未能及时交付使用，需在6#、8#阀室建设临时工程来实现天然气的置换。以中乌管线投产时的临时工程为例，分析水合物生成、节流温度变化、阀门耐低温性能、管线震动及流速控制等对投产置换的影响，结果表明：采取调节阀门组开度控制上下游压差、控制天然气流量，根据节流温度情况是否投入加热设备、阀门组予以固定等措施，对于提高投产置换的安全性，保障管线运行有着现实作用。