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。
In order to study the effect of pipe diameter increase on the safety and reliability of natural gas pipelines and analyze the feasibility of OD 1 422 mm X80 pipeline program, the risk levels were compared between OD 1 422 mm X80 pipeline with the design factor 0.72 and OD 1 219 mm X80 pipelines with the design factor 0.72 and 0.8 on the basis of pipeline risk assessment theories from the respects of crack arresting toughness, potential hazard influencing area, critical defect size, puncture resistance, failure probability, individual risk and operating risk. Results showed that under the same operation conditions, OD 1 422 mm X80 pipeline with the design factor 0.72 is higher than OD 1 219 mm X80 pipeline with the design factor 0.72 and 0.8 in terms of the critical defect size and the puncture resistance, and lower in failure probability which is caused by external corrosion and equipment impact. However, the radius of potential hazard influencing area is larger. Correspondingly, failure consequence may be increased and the overall risk level may be higher, but their difference is not significant. The research results in this paper provide not only technical support for the design and construction of OD 1 422 mm X80 pipeline engineering, but also a decisive basis for the optimization of large-capacity pipeline programs. （6 Figures, 3 Tables, 10 References）
作者
李丽锋
罗金恒
赵新伟
贾海东
张华
张广利
LI Lifeng LUO Jinheng ZHAO Xinwei JIA Haidong ZHANG Hua ZHANG Guangli(CNPC Tubular Goods Research Institute State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials PetroChina West Pipeline Company)
出处
《油气储运》
CAS
北大核心
2016年第12期1285-1289,共5页
Oil & Gas Storage and Transportation
基金
中国石油天然气集团公司重大科技专项课题"OD 1422 mm
X80管道钢管应用技术研究"
2012E-2801-09
关键词
天然气
管道
大口径
风险
natural gas, pipelines, large diameter, risk
