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| Research progress of low temperature’s effect on pipeline steel stability and welding technology |
| JING Jia-qiang1，GUO Jie1,2，LIU Qing-you2，HOU Wei3 |
（1. School of Petroleum Engineering，Southwest Petroleum University，Chengdu 610500，Sichuan，China
2. Department of Engineering Steels，Central Iron and Steel Research Institute，Beijing 100081，China
3. Sun Rise Petro Solutions Technology?Co.，Ltd.， Beijing 100082，China） |
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Abstract Along with the extension of the long distance oil and gas pipeline to the alpine region，the construction，operation and maintenance of long distance oil and gas pipelines are affected by the low temperature environment. This makes the selection of pipeline steel materials，structural integrity assessment and safe operation of pipelines critical in low temperature environment. The literatures about fatigue life，crack generation and growth，welding technology and weld fatigue stability of pipeline steel are reviewed. The mechanism of the effect of low temperature environment on the fatigue crack generation and the expansion and the mechanical properties and the fatigue stability of the weld of pipeline steel is revealed. The problems existing in the present study are summarized，and on this basis，the key points for future research are put forward.
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Received: 18 January 2018
Published: 24 August 2018
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2018, Vol. 53 
