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Research Papers: Design and Analysis

Local Buckling of Tight Fit Liner Pipe

[+] Author and Article Information
Eelke S. Focke

 Delft University of Technology, 2600 AA Delft, The Netherlands

Arnold M. Gresnigt

 Delft University of Technology, 2600 AA Delft, The Netherlandsa.m.gresnigt@tudelft.nl

Annemiek Hilberink

 Delft University of Technology, 2600 AA Delft, The Netherlands; Heerema Marine Contractors, 2332 AA Leiden, The Netherlandsahilberink@hmc-heerema.com

J. Pressure Vessel Technol 133(1), 011207 (Jan 20, 2011) (10 pages) doi:10.1115/1.4003279 History: Received June 09, 2010; Revised December 03, 2010; Published January 20, 2011; Online January 20, 2011

A promising possibility to reduce costs in pipelines that require corrosion resistant alloys (CRAs) is the use of lined pipe, consisting of a carbon steel outer pipe and a CRA liner pipe. Research has been carried out into the local buckling behavior of the thin walled liner pipe. Important parameters are the wall thickness and material properties of the liner pipe, the contact force between the liner pipe and the outer wall, the coefficient of friction between the two walls, and the imperfections. Local buckling of the liner pipe due to combinations of bending and normal force is one of the failure modes to be considered in offshore installation of line pipe. The results of axial compression tests are presented: on liner pipe only (I), on liner pipe while positioned in the outer pipe (II), and on the joined liner and outer pipe (III). Thanks to the support of the outer pipe, local buckling of the liner pipe occurs at much higher stresses and strains than without that support. The measured buckling strains of the tests on liner pipe only (I) are in reasonable agreement with local buckling equations. Finite element calculation results are presented and compared with test results. The influence of the determining parameters for the different load cases is discussed.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 8

Axial compression test on liner pipe comparison test and FEM results

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Figure 9

Axial compression FEM results comparison clamped and symmetric boundary conditions for initial imperfection amplitude of 10−2 mm

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Figure 15

Test setup of the axial compression tests of the liner and outer pipe of the TFP (10.750 in. TFP)

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Figure 16

Buckled 10.750 in. liner and outer pipe (inside and outside)

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Figure 17

FEM results for 12.750 in. liner and outer pipe with and without friction between liner and outer pipe

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Figure 4

Test setup for the 10.750 in. liner pipe alone

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Figure 5

Compression pad and plate supporting the extra hinge in the liner buckling tests

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Figure 6

Buckles in the 10.750 in. and 12.750 in. liner pipe

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Figure 7

Test setup for the 12.750 in. liner pipe alone

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Figure 10

Axial compression FEM results comparison shell and solid model for initial imperfection amplitude of 10−2 mm

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Figure 1

Tight fit pipe manufacturing process (9)

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Figure 2

Stresses in TFP indicating the fit between the liner and outer pipe

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Figure 3

Stress strain relationship liner material and outer pipe

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Figure 11

Test setup for liner buckling tests, while inside the outer pipe (10.750 in. and 12.750 in. TFP)

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Figure 12

Measured force-strain diagram for test 4

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Figure 13

Wavelike imperfection in the liner due to the longitudinal weld in the outer pipe

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Figure 14

The effect of wavelike imperfections in the liner due to the longitudinal weld in the outer pipe and different liner hoop stress and resulting friction

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