| Welding technique and quality of large diameter X70 line pipe for gas transmission of China |
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| 引用本文： | 刘亚旭,霍春勇,李为卫,马秋荣,冯耀荣. Welding technique and quality of large diameter X70 line pipe for gas transmission of China[J]. 广东有色金属学报, 2005, 0(Z1) |
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| 作者姓名： | 刘亚旭 霍春勇 李为卫 马秋荣 冯耀荣 |
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| 作者单位： | Xi' an Jiaotong University Xi' an 710049 China，The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods CNPC Xi' an 710065 China，Xi' an Jiaotong University Xi' an 710049 China，The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods CNPC Xi' an 710065 China，The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods CNPC Xi' an 710065 China，The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods CNPC Xi' an 710065 China，The Key Laboratory for Mechanical and Environmental Behavior of Tubular Goods CNPC Xi' an 710065 China |
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| 摘 要： | 1IntroductionWest-East Gas Transmission Pipeline Project was a great and key project of China in2001to2003.The total length of the pipeline is about4000km.The initial gas transmission is12×109m3/a and finaltransmission will be20×109m3/a.The design pressure is14MPa and operating pressure10MPa.About1·6×106t of line pipe were used for the project.It will transmit the natural gas from western of Chinawhere have rich energy to eastern where energyis very shortage,and so greatly promote ec…
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Welding technique and quality of large diameter X70 line pipe for gas transmission of China |
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| LIU Ya-xu ,,HUO Chun-yong ,,LI Wei-wei,MA Qiu-rong,FENG Yao-rong. Welding technique and quality of large diameter X70 line pipe for gas transmission of China[J]. Journal of Guangdong Non-Ferrous Metals, 2005, 0(Z1) |
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| Authors: | LIU Ya-xu HUO Chun-yong LI Wei-wei MA Qiu-rong FENG Yao-rong |
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| Affiliation: | LIU Ya-xu~ 1,2,HUO Chun-yong~ 1,2,LI Wei-wei~2,MA Qiu-rong~2,FENG Yao-rong~2 |
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| Abstract: | X70 grade large diameter line pipe with helical and longitudinal seam SAW was developed and used in West-East Pipeline Project of Petrochina. The operation pressure of the pipeline was designed as 10 MPa, with diameter of 1016 mm OD. This project represents the first high-pressure, large diameter and high strength grade gas pipeline in China. All the factors affecting the safety of the pipeline shall be considered. The welds quality of line pipe is very important for safety of the pipeline. Acicular ferrite type X70 grade pipeline steel was adopted for the base material. The welds performances of X70 line pipes with 1016mm OD and 14.6-21.0 mm WT has reached a very high level, especially of low temperature Charpy V impact toughness of welds metal. Welding technique and quality status of X70 line pipe of China are investigated in this paper. |
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| Keywords: | X70 line pipe welding technique quality |
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