0
Research Papers: Design and Analysis

Axial Load Capacity of Cold Formed Pipe Flange Connection

[+] Author and Article Information
Jan Henriksen

Department of Engineering,
University of Agder,
Jon Lilletunsvei 9,
Grimstad 4879, Norway
e-mail: jan.henriksen@uia.no

Michael R. Hansen

Department of Engineering,
University of Agder,
Jon Lilletunsvei 9,
Grimstad 4879, Norway
e-mail: michael.r.hansen@uia.no

Fredrik Christopher Thrane

Quickflange Technology AS,
Hovedgaten 10,
Tvedestrand 4900, Norway

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received January 31, 2017; final manuscript received May 19, 2017; published online June 16, 2017. Assoc. Editor: Steve J. Hensel.

J. Pressure Vessel Technol 139(5), 051201 (Jun 16, 2017) (8 pages) Paper No: PVT-17-1021; doi: 10.1115/1.4036853 History: Received January 31, 2017; Revised May 19, 2017

In this paper, a cold forming process is used where the connection between a pipe and a flange is created by means of radially expanding tool segments inside the pipe. The method is investigated with two purposes, to set up a robust procedure for the process that allows for connections to be made on site, and to set up finite element (FE) simulations that can capture the forces and deformations when pulling the pipe axially out of the flange. Experimental data and FE simulations are used to describe and understand the forces and deformations during the connection process. The rapid increase in radial stiffness experienced when the pipe comes in full circumferential contact with the flange is identified as the best end-of-process indicator. Also, experimental data and FE simulations are used to predict the axial load capacity of a pipe flange connection, and the FE model is utilized in designing the appropriate ridge height of the tool segments.

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

The main components employed in the new connecting process

Grahic Jump Location
Fig. 2

Characteristic hydraulic pressure variation during connecting process

Grahic Jump Location
Fig. 3

Initial contact conditions between segment ridge and pipe

Grahic Jump Location
Fig. 5

Main dimensions of flange connection

Grahic Jump Location
Fig. 6

Test results showing PPO force versus pipe end displacement

Grahic Jump Location
Fig. 7

Experimentally obtained true stress versus plastic strain corrected for tri-axial stress for the pipe and flange material

Grahic Jump Location
Fig. 8

Initial geometry of segment, pipe and flange: (a) before segment expansion and (b) before the PPO process

Grahic Jump Location
Fig. 9

Relationship between contact pressure and frictional shear stress

Grahic Jump Location
Fig. 10

The location of mesh refinement is indicated by means of a rectangle

Grahic Jump Location
Fig. 11

Deformation of pipe and flange after 22 mm pipe pull out displacement for the experimental (a) test and simulation (b)

Grahic Jump Location
Fig. 12

Experimental and numerical results for pipe pull out force versus pipe end displacement

Grahic Jump Location
Fig. 13

The ridge height, h, and the radial expansion, r, of a segment

Grahic Jump Location
Fig. 14

Segment radial expansion force versus segment radial expansion for different ridge heights

Grahic Jump Location
Fig. 15

Simplified free body diagrams of cone (left) and a segment (right)

Grahic Jump Location
Fig. 16

PPO force versus pipe end displacement for different ridge heights including test

Grahic Jump Location
Fig. 17

Deformation plots of pipe pull out for different ridge heights

Grahic Jump Location
Fig. 18

PPO versus pipe end displacement for identical ridge heights with different pipe tolerances

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In