Study on Security Angle of Gas Pipeline Elbow Based on Stress Analysis Method

Jieying Liu1, *, Lingxiao Li2, Tianjiao Hou3, Xinguo Wu4, Qiao Zhou4
1 School of Chemistry and Chemical Engineering, Yulin University, Yulin, China
2 College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, China
3 Viterbi School of Engineering, University of Southern California, Los Angeles, USA
4 Xinjiang Petroleum Survey and Design Research Institute, Urumchi, China

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© Liu et al; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the School of Chemistry and Chemical Engineering, Yulin University, Yulin, China; E-mail:


The gas pipelines usually undergo complicated and changeable regional environment. As the level of the potential difference or pipeline’s route changes in the space and therefore elastic bending cannot meet the needs when pipe changes its direction, we generally use pipe bend to connect two pipelines with different spatial extend direction during the pipe laying period, and it can reduce the temperature stress. Unreasonable design of elbow will lead to pipeline damage. We established mountain area pipeline model, and conducted analysis on pipeline stress under different elbow angles. Research shows that different angles of the bends suffer different operation stress, and we have come to the conclusion that the angle of pipe bends should not be within the range of 15 degrees to 35 degrees.

Keywords: Gas pipeline, pipe bend, security bending angle, stress analysis.