Sensitivity Analysis of Influencing Factors of Gas Pipelines with Corrosion Defects under the Action of Landslides

Xiaoting Gu, Yaoyao Zhang (), Chunfeng Huang, Xi Luo, Hailun Zhang, Rui Zhou and Yijie Qiu
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Xiaoting Gu: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Yaoyao Zhang: Gudao Oil Production Plant, Shengli Oilfield Company of Sinopec, Dongying 257231, China
Chunfeng Huang: Shengli Oilfield Petroleum Development Center Co., Ltd., Dongying 257100, China
Xi Luo: CNOOC Safety & Technology Services Co., Ltd., Beijing 100070, China
Hailun Zhang: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Rui Zhou: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Yijie Qiu: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China

Energies, 2022, vol. 15, issue 18, 1-17

Abstract: Sensitivity analysis aids in determining important factors affecting pipeline safety. Sensitivity analysis of stress inside gas pipelines with corrosion defects in a landslide region can provide a theoretical basis for the safe operation of pipelines. This study considered an X80 high-grade steel gas pipeline model with corrosion defects using finite element analysis (ABAQUS software) under lateral landslide conditions. Particularly, we studied the six major engineering elements of soil cohesion to understand the stress variations in buried gas pipelines and performed a sensitivity analysis of each influencing parameter. The calculation results revealed that all the factors influencing the stress in corroded gas pipelines during landslide conditions were positively correlated to the internal pipe stress, except for the axial position of corrosion defects. The factors in the descending order of influence on the sensitivity coefficient are stated as follows: landslide displacement, axial position of corrosion defect, soil cohesion, depth of corrosion defect, pressure, and length of corrosion defect. The results of this study will aid in the design and implementation of such pipelines in mountainous or other landslide-prone terrains.

Keywords: lateral landslide; corrosion defect; gas pipeline; stress; sensitivity analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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