Pretightening Range of Flange Joints in Pipeline Considering Nonlinear Compression Resilience of Gaskets
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 10, Issue 3
Abstract
The analytical pretightening force range of flange joints in a pipeline was deduced based on the allowable gasket stress and flange rotation angle considering the nonlinear compression resilience behavior of gaskets. Relationships between pretightening force and working pressure or gasket stress were established. The results show that the corresponding relationship between bolt pretightening stress and gasket stress under different internal pressures is different due to the nonlinear compression resilience performance. Moreover, the region enclosed by the minimum bolt load under initial pretightening, the minimum bolt load under working pressure, and the maximum bolt load corresponding to the limit flange rigidity in the diagram of bolt pretightenting force versus working pressure can be treated as the effective sealing region for flange joints in a pipeline. Additionally, the bolt pretightening range can be defined as [, ] in a diagram of bolt pretightenting stress versus gasket stress. These are simple and effective strategies to define a reasonable pretightening range of flange joints for engineering design and assembly in a pipeline system.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (51305310), Hubei Provincial Department of Education Science and Technology Research Program (D20161508), and Wuhan Youth Science and Technology Plan (2016070204010120).
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Information & Authors
Information
Published In
Journal of Pipeline Systems Engineering and Practice
Volume 10 • Issue 3 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Nov 10, 2017
Accepted: Jan 7, 2019
Published online: May 31, 2019
Published in print: Aug 1, 2019
Discussion open until: Oct 31, 2019
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