The line pipes with large diameter,thick wall and high steel grade are preferred to meet the requirements of extremely high gas transmission rate(380×10^(8) m^(3)/a)in the Sino-Russian eastern route project.In th...The line pipes with large diameter,thick wall and high steel grade are preferred to meet the requirements of extremely high gas transmission rate(380×10^(8) m^(3)/a)in the Sino-Russian eastern route project.In this paper,the technical standards of line pipes at home and abroad were comparatively analyzed after the research and formulation process of technical specifications of X80 line pipes(OD 1422 mm)used in the above-mentioned project was introduced.The key technical indexes such as chemical components,crack-arrest-toughness values,etc.and its formulation process were discussed.In addition,the development process and product performance of the X80 line pipes(OD 1422 mm)were described.It is proved by trial production and product tests that using X80 line pipes(OD 1422 mm)in this gas project is a rational and effective solution to the following technical issues such as chemical composition control,fracture control and welding stability maintenance.This type of line pipes is proved not only to meet project requirements,but to suit for production cases.As a result,the safety of Sino-Russian eastern route gas pipeline will be guaranteed essentially.The research results in this paper provide a strong technical support for the application of X80 line pipes(OD 1422 mm)in the Sino-Russian eastern route project,and play a guiding role in drawing up the technical specifications of other gas pipeline projects.展开更多
High-grade(API 5L X80)and large-diameter(OD 1422 mm)line pipes are used in the Sino-Russian eastern route gas pipeline project for high pressure(12 MPa)transmission,and this can significantly increase the transmission...High-grade(API 5L X80)and large-diameter(OD 1422 mm)line pipes are used in the Sino-Russian eastern route gas pipeline project for high pressure(12 MPa)transmission,and this can significantly increase the transmission capacity and meet China's energy strategic demand.With the increase of steel grade,transmission pressure,pipe diameter and design coefficient,however,ductile crack of line pipes becomes the dominant crack mode,so it is necessary to focus on crack arrest and control study.In this paper,therefore,an intensive study was performed on the Battelle Two-Curve(BTC)method which is the major solution to the calculation of arrest toughness,as well as the crack resistance curve and decompression curve.Based on the study,the principle and application range of the BTC method were confirmed.In addition,a series of analysis were conducted on the issues which occurred when the BTC method was applied to high-strength,high-toughness line pipe steel,and the commonly used modified approaches to BTC calculation results were also provided.After the crack control scheme of the X80 large OD 1422 mm line pipes for the Russian Bovanenkovo-Ukhta was reviewed,the BTC calculation results were corrected on the basis of the design parameters of the Sino-Russian eastern routine gas pipeline project,the Charpy V-notched(CVN)impact energy which meets the project requirement was finally worked out to be 245 J.展开更多
文摘为了满足中俄东线天然气管道工程380×10~8 m^3/a超大输气量的要求,大口径、厚壁、高钢级钢管便成为了主要选择。为此,结合该管道工程用外径为1 422 mm的X80钢管材技术条件的研究制订过程,对国内外管线钢管技术标准进行了对比分析,同时对外径为1 422 mm X80钢管材技术条件中的化学成分和止裂韧性等关键技术指标及制订过程进行了分析探讨,并对外径为1 422 mm X80钢管的开发过程及产品性能进行了介绍。通过生产试制和产品检测,证明现有技术条件合理有效地解决了化学成分控制、断裂控制、产品焊接稳定性等技术问题,不仅满足了工程要求,而且也适应生产情况,可以保障中俄东线天然气管道的本质安全。该研究成果可为中俄东线建设外径为1 422 mm X80钢天然气管道提供技术支撑,同时对于其他天然气管道工程技术条件的制订也具有指导意义。
文摘The line pipes with large diameter,thick wall and high steel grade are preferred to meet the requirements of extremely high gas transmission rate(380×10^(8) m^(3)/a)in the Sino-Russian eastern route project.In this paper,the technical standards of line pipes at home and abroad were comparatively analyzed after the research and formulation process of technical specifications of X80 line pipes(OD 1422 mm)used in the above-mentioned project was introduced.The key technical indexes such as chemical components,crack-arrest-toughness values,etc.and its formulation process were discussed.In addition,the development process and product performance of the X80 line pipes(OD 1422 mm)were described.It is proved by trial production and product tests that using X80 line pipes(OD 1422 mm)in this gas project is a rational and effective solution to the following technical issues such as chemical composition control,fracture control and welding stability maintenance.This type of line pipes is proved not only to meet project requirements,but to suit for production cases.As a result,the safety of Sino-Russian eastern route gas pipeline will be guaranteed essentially.The research results in this paper provide a strong technical support for the application of X80 line pipes(OD 1422 mm)in the Sino-Russian eastern route project,and play a guiding role in drawing up the technical specifications of other gas pipeline projects.
文摘High-grade(API 5L X80)and large-diameter(OD 1422 mm)line pipes are used in the Sino-Russian eastern route gas pipeline project for high pressure(12 MPa)transmission,and this can significantly increase the transmission capacity and meet China's energy strategic demand.With the increase of steel grade,transmission pressure,pipe diameter and design coefficient,however,ductile crack of line pipes becomes the dominant crack mode,so it is necessary to focus on crack arrest and control study.In this paper,therefore,an intensive study was performed on the Battelle Two-Curve(BTC)method which is the major solution to the calculation of arrest toughness,as well as the crack resistance curve and decompression curve.Based on the study,the principle and application range of the BTC method were confirmed.In addition,a series of analysis were conducted on the issues which occurred when the BTC method was applied to high-strength,high-toughness line pipe steel,and the commonly used modified approaches to BTC calculation results were also provided.After the crack control scheme of the X80 large OD 1422 mm line pipes for the Russian Bovanenkovo-Ukhta was reviewed,the BTC calculation results were corrected on the basis of the design parameters of the Sino-Russian eastern routine gas pipeline project,the Charpy V-notched(CVN)impact energy which meets the project requirement was finally worked out to be 245 J.
