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Pipeline Systems

Optimization of Pipe Repair Sleeve Design

[+] Author and Article Information
A. F. M. Arif1

Department of Mechanical Engineering,  King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabiaafmarif@kfupm.edu.sa

Yaqoub N. Al-Nassar, Hussain Al-Qahtani, Shafique M. A. Khan, Muhammad Anis, A. M. Eleiche, Muhammad Inam

Department of Mechanical Engineering,  King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

Nadhir I. Al-Nasri, Hussain M. Al-Muslim

CSD/MED/Piping Unit, Saudi Aramco, Dhahran 31311, Saudi Arabia

1

Corresponding author.

J. Pressure Vessel Technol 134(5), 051702 (Sep 10, 2012) (10 pages) doi:10.1115/1.4006126 History: Received October 29, 2011; Revised November 29, 2011; Published September 10, 2012; Online September 10, 2012

For the repair of pipeline defects, repair sleeves are the most widely used method in petrochemical industry. The objective of this work was to optimize the thickness of nonpressure containing repair sleeve, by refining the existing design practice. Laboratory studies involving instrumentation of small-scaled repair sleeve system coupled with finite element analysis were carried out to refine the design procedure and optimize the thickness of the sleeve. Using a unified approach for finite element modeling, including failure pressure estimation and simulation of sleeve installation pressure, 24 cases ranging from 6 to 60 in. nominal diameter were investigated. In this paper, the details of the optimization approach used in this investigation are presented.

Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Pipe and defect geometry

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Figure 2

Geometry and finite element mesh for flawed pipe

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Figure 3

Stress–strain curve for API 5l grade X65 (20)

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Figure 4

von Mises and principal strain distribution

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Figure 5

Finite element mesh convergence

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Figure 6

Experimental setup and strain gage locations

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Figure 7

Solid model with sleeve and epoxy

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Figure 8

Finite element mesh for sleeve repair system

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Figure 9

von Mises stress distribution at po when pinstallation  = 0.90 (po )

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Figure 10

Variation in the maximum Mises stress with the installation pressure (pinstallation )

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Figure 11

Relationship between failure pressure (pflawed ), maximum operating pressure (po ), and installation pressure (pinstallation )

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Figure 12

von Mises plastic strain distribution in the pipe at po when pinstallation  = 0.90(po )

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Figure 13

Variation in von Mises plastic strain with installation pressure

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Figure 14

Optimization approach scheme

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Figure 15

(a) Simulation results for repair sleeve thickness optimization and (b) simulation results for butt strap thickness optimization

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Figure 16

(a) Comparison with power fit using Eq. 2: repair sleeve thickness and (b) comparison with power fit using Eq. 2: butt strap thickness

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