Direct Tension Performance of Steel Pipelines with Welded Slip Joints
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 1, Issue 4
Abstract
Full-scale direct tension test results are presented in this paper for two steel pipelines with welded slip joints, using high quality external welds, and an outer diameter and wall thickness of 320 and 6.4 mm, (12.5 and 0.25 in.) respectively. The test pipes were loaded to complete circumferential tensile failure. The results of numerical simulations with a two-dimensional axisymmetric solid finite-element (FE) models using the program ABAQUS compare favorably with the experimental measurements. The FE results show that pipelines in the field with high quality welds can sustain maximum tensile strain of about 0.03 even with internal pressure. Assuming good welds, an allowable tensile strain level of 0.01 to 0.015 is recommended. The test results are discussed with respect to welding and inspection practices, as well as their application in the design and risk assessment of pipelines subject to large ground deformation caused by earthquakes, landslides, and subsidence.
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Acknowledgments
This research was supported by the Multidisciplinary Center for Earthquake Engineering Research, Buffalo, New York and the National Science Foundation, whose assistance is gratefully acknowledged. Numerical modeling (FEA) during the initial stages of work was conducted by Dr. Scott Jones, URS Corporation, who is thanked for his excellent work. The collaboration and support of LADWP is deeply appreciated, and, in particular, thanks are extended to Glen Singley, Craig Davis, Charlotte Rodriquez of LADWP, and LeVal Lund, formerly of LADWP. The writers also acknowledge Doug Taylor and his engineering staff at Taylor Devices, Inc. for providing access to his test equipment and facility. Thanks are also given to Ron Watson, Ed Fyfe, and the technical staff at Master Builders, Inc.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 1 • Issue 4 • November 2010
Pages: 133 - 140
Copyright
© 2010 ASCE.
History
Received: Jan 16, 2010
Accepted: May 19, 2010
Published online: May 22, 2010
Published in print: Nov 2010
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