|本期目录/Table of Contents|

 CHEN Guohua,ZHAO Yixin,HUANG Kongxing,et al.Analysis and countermeasures on temperature difference stress of piping with non-flexible connection in petrochemical storage tanks[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(3):129-135.[doi:10.11731/j.issn.1673-193x.2018.03.019]





Analysis and countermeasures on temperature difference stress of piping with non-flexible connection in petrochemical storage tanks
(华南理工大学 机械与汽车工程学院,广东 广州 510641)
CHEN Guohua ZHAO Yixin HUANG Kongxing HU Kun
(School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou Guangdong 510641, China)
non-flexible connection thermal stress of piping finite element stress concentration safety measures
The thermal displacement of piping in the storage tanks will be generated under the effect of temperature difference, which may cause the thermal stress on the pipe wall, and the break and leakage of piping without using the flexible connection may occur due to the effect of thermal stress concentration. To eliminate the potential safety hazards of piping with the non-flexible connection in the petrochemical storage tanks, the thermal stress distribution of typical piping in the petrochemical enterprises was simulated by using the finite element analysis software ANSYS. The targeted safety measures in the aspects of engineering technology and management were put forward according to the analysis results of piping with different types. It showed that the temperature difference effect had significant influence on the thermal stress of piping in the petrochemical storage tanks, with the increase of temperature difference between inside and outside, the stress concentration area of piping and the maximum value of thermal stress increased. The compensation measures could improve the flexibility of piping and decrease the stress of piping. The constraint load would restrict the thermal expansion of piping, thus increase the stress of piping. The tee was the connection area of multiple piping, and the obvious stress concentration would form at this type of position with complex pipes intersection. The results have a certain guiding significance for improving the safety of piping with the non-flexible connection in the petrochemical industry.


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更新日期/Last Update: 2018-04-11