Safety Analysis and Condition Assessment of Corroded Energy Pipelines under Landslide Disasters

Author:

Zhang Peng1,Liu Wei2ORCID,Liu Siming3,Xu Tian3,Li Yimiao1,Huang Yunfei4ORCID

Affiliation:

1. School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China

2. School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China

3. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China

4. Safety and Security Science Section, Department of Values, Technology and Innovation, Faculty of Technology, Policy and Management, Delft University of Technology, 2628 BX Delft, The Netherlands

Abstract

Corrosion poses a significant risk to the safety of energy pipelines, while landslide disasters emerge as the primary threat responsible for triggering pipeline failures across mountainous areas. To date, there is limited research focused on the safety of energy pipelines considering the synergistic effect of corrosion and landslides. The present study proposes a finite element (FE)-based model to assess the condition of corroded pipelines under landslides. The effects of corrosion dimensions (length and depth) and location are determined. A novel equation is finally developed to predict the maximum stress and determine the most disadvantageous position for corroded pipelines under various landslide displacements. The results demonstrate that (1) as the landslide progresses, the pipeline’s stress significantly increases; (2) corrosion depth has a more significant impact on the pipeline condition than the corrosion length, and it is positively correlated with the pipe’s stress; (3) the maximum stress exhibits a nonlinear relationship with the landslide-facing position and the corrosion circumferential location; and (4) when the axial position of the corrosion is more than 6.5 m away from the center of the landslide, the location of maximum stress shifts from the corrosion region to the central section of the pipeline within the landslide. This work contributes to helping pipeline owners to understand the applicability of energy pipelines subjected to the combined effects of corrosion and landslides and provides support for future risk assessment efforts in pipeline integrity management.

Funder

National Natural Science Foundation of China

Special Research Fund for Doctoral Programs in Universities

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

Reference41 articles.

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