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Research Papers: Materials and Fabrication

Nanofillers Reinforced Polymer Composites Wrap to Repair Corroded Steel Pipe Lines

[+] Author and Article Information
Vishwas Chandra Khan

School of Mechanical Sciences,
Indian Institute Technology Bhubaneswar,
Bhubaneswar 752050, India
e-mail: vk13@iitbbs.ac.in

G. Balaganesan

Department of Mechanical Engineering,
Indian Institute of Technology Madras,
Chennai 600 036, India

Arun Kumar Pradhan

School of Mechanical Sciences,
Indian Institute Technology Bhubaneswar,
Bhubaneswar 752050, India

M. S. Sivakumar

Department of Applied Mechanics,
Indian Institute of Technology Madras,
Chennai 600 036, India

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received January 26, 2017; final manuscript received April 13, 2017; published online May 26, 2017. Assoc. Editor: Kunio Hasegawa.

J. Pressure Vessel Technol 139(4), 041411 (May 26, 2017) (9 pages) Paper No: PVT-17-1019; doi: 10.1115/1.4036534 History: Received January 26, 2017; Revised April 13, 2017

This paper presents the analysis of repair of pipelines using nanofiller dispersed composites. Steel pipe with part wall loss as per ISO 24817 is repaired using glass/epoxy composites with and without nanoclay reinforcement and burst test is performed in order to assess the performance and effectiveness of nanocomposites-based repair system. A simple methodology is developed to find out the failure pressure of pipelines and is compared with the experimental and ISO 24817 repair code results. The thickness of the composite wrap is predicted analytically for 1–5% nanofiller dispersion in the epoxy for 30–80% of pipe wall loss and live pressure of pipe. The results are analyzed to find effectiveness of clay dispersion and effect of live pressure for 30–80% of pipe wall loss. It is observed that the dispersion of nanofiller improves the bursting resistance of composite wrapping over outer surface of pipe.

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References

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Figures

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Fig. 1

Pipe with initial part wall loss and defect

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Fig. 2

(a) Filling of machined defect portion with and without nanoclay particles, (b) shear mixer for mixing clay in epoxy, and (c) shear mixing of nano filler in epoxy [19,20]

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Fig. 3

Various steps in laying of composite sleeve around the pipe: (a) wrapping of first layer of fiber, (b) applying resin, (c) wrapping of second layer, and (d) test pipe after wrapping of fiber

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Fig. 4

Layout of pipe burst test setup

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Fig. 5

Pipe with a localized corrosion damage repaired with composite sleeve system

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Fig. 6

Notched pipe subjected to internal burst pressure of 10.1 MPa

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Fig. 7

(a) Cross section of failed pipe repaired with glass/epoxy composite and (b) Notch area of test section

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Fig. 8

(a) Cross section of repaired pipe with glass/epoxy composite and (b) Notch area of test section

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Fig. 9

(a) Cross-sectional view of failed pipe repaired with nanofiller dispersed glass/epoxy composite and (b) enlarged view of repaired cross section after failure

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Fig. 10

Failure pressure for composite wrap with and without clay as per ISO 24817

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Fig. 11

Repair thickness at different wall loses for 0–5% clay for zero live pressure

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Fig. 12

Repair thickness for various percentage of wall loss for 0–5% clay for 25% live pressure

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Fig. 13

Repair thickness for various percentage of wall loss for 0–5% clay for 50% live pressure

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Fig. 14

Repair thickness for various percentage of wall loss for 0–5% clay for 75% live pressure

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Fig. 15

Repair thickness for various percentage of wall loss for 0–5% clay for 100% live pressure

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Fig. 16

Composite wrap thickness for epoxy with 3% clay for various percentage of wall loss and various live pressures

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