中缅天然气管道高陡边坡管段清管安全分析  

Analysis on pigging safety of a steep slope section of Myanmar-China Natural Gas Pipeline

作　　者：冯淑路 鲁青龙 朱建平 侯浩 何佳忆 FENG Shulu;LU Qinglong;ZHU Jianping;HOU Hao;HE Jiayi(PipeChina Southwest Pipeline Company;School of Mechanical Engineering,Southwest Petroleum University)

机构地区：[1]国家管网集团西南管道公司 [2]西南石油大学机电工程学院

出　　处：《油气储运》2022年第1期107-113,共7页Oil & Gas Storage and Transportation

基　　金：海关总署科研项目“管输进口天然气非常规安全风险识别、分析和防范研究”,2019HK076;四川省科技计划项目“高含硫天然气集输管道智能清管器骨架优化设计研究”,2021YFSY0057。

摘　　要：中缅天然气管道某80°高陡边坡管段在进行清管作业时,清管器极易对管底弯头造成巨大冲击,可能引发天然气泄漏等灾难性后果。利用OLGA软件获得该边坡管段的清管器运行压力、运行速度及持液率等工艺参数,利用ANSYS与CAESARⅡ有限元软件,建立清管过程中的应力与位移模型并进行有限元分析,进而提出安全清管建议。结果表明:现有运行工况下,使用4000 kg的清管器,不会发生应力超限,且位移在可控范围之内;水保结构对管道具有良好的嵌固与保护作用,清管器质量由1200 kg提升至4000 kg时,管道应力与位移分别增加12.3%、1.3%。研究成果对于提高高陡边坡管段的清管器运行效率与清管安全性具有重要意义,可为大落差管道清管作业的安全性提供技术参考。(图7,表8,参21)During the pigging operation in an 80°slope section of Myanmar-China Natural Gas Pipeline,huge impact can be brought easily to the elbows at bottom of the pipeline,which could result in catastrophic consequences such as natural gas leakage.Herein,the process parameters such as the operating pressure and the operating speed of the pigs in the slope section,as well as the liquid holdup thereof,were obtained with OLGA software.On this basis,the stress and displacement model during pigging was established with the finite element software ANSYS and CAESARⅡ,the finite element analysis was also performed,and thereby recommendations on safe pigging were put forward.The results show that no excessive stress will be applied and the displacement is within a controllable range if a 4000 kg pig is used under the current operating conditions.The water and soil conservation structure can fix and protect the pipelines effectively.In addition,when the weight of the pig is increased from 1200 kg to 4000 kg,the stress and displacement of the pipeline are increased by 12.3%and 1.3%respectively.Therefore,the research results are of great significance for improving the pigging efficiency and safety of the steep slope section,and could provide technical reference for the safe pigging of the steep slope sections.(7 Figures,8 Tables,21 References)

关 键 词：中缅天然气管道 陡峭边坡 清管 安全 有限元分析 

分 类 号：TE88[石油与天然气工程—油气储运工程]