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Analysis on Factors Affecting Stress in Gas Pipeline

Sha Xiaodong(SINOPEC Beijing Gas Company,Beijing,100029,China) Chen Xiaohui(Petro China Kunlun Gas Southwest Company,Chengdu,Sichuan,610023,China) Huang Kun,Lu Siyuan,Lu Hongfang(Southwest Petroleum University Oil Engineering College,Chengdu,Sichuan,610500,China)  
Terrain along long distance gas pipeline is complex and such factors as dead load,internal pressure and temperature of pipeline may result in pipeline hoop stress and temperature stress more than allowable stress of pipe material,which will lead to pipeline failure.Therefore,it is particularly important to study factors affecting stresses in gas pipeline operation.Applied is the pipeline stress analysis software CAESAR II to analyze the average stress of pipelines with various diameters.Analysis results show that diameter increase will lead to more effect of temperature on pipeline stress and less effect of pressure on pipeline stress.Such results provide certain safety basis for pipeline design and have referable engineering value.
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