Investigation of the behaviour of pipe elbows due to the bourdon effect for different boundary conditions

Md Abdul Hamid Mirdad, Diana Abdulhameed, Muntaseer Kainat, Marwan El-Rich, Michael Martens, Samer Adeeb, J. J.Roger Cheng

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Steel pipe elbow is a common feature in piping systems which is used to change the direction of a straight pipe. The Bourdon effect is the phenomenon of the elbows tending to straighten out when pressurized. Shemirani et al. (2014) studied the influence of the Bourdon effect on the ovalization developed in the elbows for fixed boundary conditions. They showed that there is an increase in the stresses within the elbow; however, this effect is not at all addressed in the Canadian oil and gas pipeline code CSA Z662-11. Kainat et al. (2014) studied how geometric imperfections influence the Bourdon effect in the elbows for fixed boundary conditions. Here we extended the study of the Bourdon effect by focusing on the behavior of pipe elbows using different boundary conditions and neglecting any initial geometric imperfections. Nominal pipe sizes of 12, 36 and 42 inch were analyzed with various OD/t ratios. 90° pipe elbow models were analyzed using finite element analysis software ABAQUS for different boundary conditions at the ends of the elbows. The ends have been allowed to expand in the radial direction upon pressurization to prevent stress concentrations. Under normal operating pressure for (80% SMYS) hoop stress; the Bourdon effect, von Mises stresses and reaction force in the pipe elbows were investigated. From the analysis results, the effect of the boundary conditions on the mechanical response of the elbow is investigated.

Original languageBritish English
Title of host publicationCanadian Society for Civil Engineering Annual Conference 2015
Subtitle of host publicationBuilding on Our Growth Opportunities
Pages965-973
Number of pages9
ISBN (Electronic)9781510823648
StatePublished - 2015
EventCanadian Society for Civil Engineering Annual Conference 2015: Building on Our Growth Opportunities - Regina, Canada
Duration: 27 May 201530 May 2015

Publication series

NameProceedings, Annual Conference - Canadian Society for Civil Engineering
Volume2_2015

Conference

ConferenceCanadian Society for Civil Engineering Annual Conference 2015: Building on Our Growth Opportunities
Country/TerritoryCanada
CityRegina
Period27/05/1530/05/15

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