管径1422mm、X80管道的风险水平

发布时间：2018-05-15 04:24

本文选题：天然气 + 管道　；参考：《油气储运》2016年12期

【摘要】：为了研究管径增大对天然气管道安全可靠性的影响,分析管径1 422 mm、X80管道方案的可行性,基于管道风险评估理论,从止裂韧性、潜在危害影响范围、临界缺陷尺寸、刺穿抗力、失效概率、个体风险及运行风险等方面,对比分析了0.72设计系数下管径1 422 mm、X80管道与0.72和0.8设计系数下的1 219 mm、X80管道的风险水平。结果表明:在同等运行条件下,与设计系数为0.8和0.72、管径1 219 mm、X80管道相比,设计系数为0.72、管径1 422 mm、X80管道临界缺陷尺寸和刺穿抗力有所提高,外腐蚀和设备撞击引起的管道失效概率有所下降,潜在危害影响区域半径增大,对应的失效后果可能增加,总体风险水平相应提高,但相差不大。研究结果可为大输量管道方案优选提供决策依据,为管径1 422 mm、X80管道工程设计与建设提供技术支撑。
[Abstract]:In order to study the influence of pipe diameter increase on the safety and reliability of natural gas pipeline, the feasibility of pipe diameter 1 422 mm X 80 pipeline scheme is analyzed. Based on the theory of pipeline risk assessment, the crack arrest toughness, potential harm range, critical defect size and puncture resistance are analyzed. In the aspects of failure probability, individual risk and operation risk, the risk level of the pipeline with diameter of 1 422 mm X 80 under 0.72 design coefficient and 1 219 mm X 80 with 0.72 and 0.8 design coefficients is compared and analyzed. The results show that under the same operating conditions, the design coefficient is 0.72and the critical defect size and piercing resistance of the pipe is increased, compared with the design coefficients of 0.8 and 0.72 and the diameter of 1 219 mm of X80 pipe. The failure probability of pipeline caused by external corrosion and equipment impact decreases, the radius of potential damage area increases, the corresponding failure consequence may increase, and the overall risk level increases, but the difference is not significant. The results of the study can provide the decision basis for the optimal selection of the large volume pipeline scheme and provide technical support for the design and construction of the pipeline project with a diameter of 1,422mm and X80.
【作者单位】：中国石油集团石油管工程技术研究院;石油管材及装备材料服役行为与结构安全国家重点实验室;中国石油西部管道公司;
【分类号】：TE88

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