现行设计系数对中俄东线OD 1422mm管道的适用性

发布时间：2018-12-10 23:08

【摘要】：中俄东线天然气管道工程是大口径(OD 1 422 mm)、高压力输气管道,涉及新工艺、新管材的应用,按照目前我国管道设计标准规定的设计系数确定的管道壁厚能否保证管道安全运行,是其设计过程中的技术难题之一。利用我国天然气管道可靠性设计与评价技术研究成果,结合中俄东线OD 1 422 mm管道途经地区等级、管材性能、建设及运行维护参数,依据现行设计系数计算得到中俄东线天然气管道工程的3种管道壁厚分别为21.4 mm、25.7 mm、30.8 mm。基于可靠性方法对管道失效概率进行计算分析,得到极端极限状态下管道失效概率分别为1.27×10~(-7)次/(km·a)、3.66×10~(-10)次/(km·a)、3.53×10~(-15)次/(km·a),均满足中俄东线天然气管道目标可靠度要求,表明按现有设计系数计算得到的管道壁厚对OD 1 422 mm管道设计是适用的,能够保障管道建成后安全平稳运行。
[Abstract]:The natural gas pipeline project of the East Line between China and Russia is a large-caliber (OD 1,422 mm),) high pressure gas pipeline, which involves the application of new technology and new pipes. It is one of the technical problems in the design process that whether the pipe wall thickness determined according to the design coefficient stipulated in the design standard of our country can ensure the safe operation of the pipeline. Based on the research results of reliability design and evaluation technology for natural gas pipelines in China, combined with the regional grade, pipe performance, construction and operation and maintenance parameters of the OD 1422 mm pipeline in East China and Russia, According to the calculation of the current design coefficient, the wall thickness of three kinds of pipelines in the East China Gas Pipeline Project is 21.4 mm,25.7 mm,30.8 mm., respectively. The failure probability of pipeline is calculated and analyzed based on reliability method. The failure probability of pipeline is 1.27 脳 10 ~ (-7) times / (km a), 3.66 脳 10 ~ (-10) times / (km a), under extreme limit state, respectively. 3.53 脳 10 ~ (-15) times / (km a), meets the target reliability requirements of the East Russia natural gas pipeline, which indicates that the wall thickness calculated from the existing design coefficients is applicable to the design of the OD 1,422 mm pipeline. It can ensure the safe and stable operation of the pipeline after completion.
【作者单位】：中国石油天然气管道工程有限公司;
【基金】：中国石油天然气股份公司“十二·五”重大科技专项“第三代大输量天然气管道关键技术研究”,2012E-2801-01
【分类号】：TE973

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