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Research Papers: Design and Analysis

Measurement and Characterization of the Initial Geometric Imperfections in High Strength U-ing, O-ing and Expanding Manufactured Steel Pipes

[+] Author and Article Information
Muntaseer Kainat

University of Alberta,
4-110 Markin/CNRL Natural Resources Engineering Facility,
9105 116th Street,
Edmonton, AB T6G 2W2, Canada
e-mail: kainat@ualberta.ca

J. J. Roger Cheng

University of Alberta,
3-029 Markin/CNRL Natural Resources
Engineering Facility,
9105 116th Street,
Edmonton, AB T6G 2W2, Canada
e-mail: roger.cheng@ualberta.ca

Michael Martens

TansCanada PipeLines Ltd.,
301 450—1St Street SW,
Calgary, AB T2P 5H1, Canada
e-mail: michael_martens@transcanada.com

Samer Adeeb

University of Alberta,
3-025 Markin/CNRL Natural Resources
Engineering Facility,
9105 116th Street,
Edmonton, AB T6G 2W2, Canada
e-mail: adeeb@ualberta.ca

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received March 20, 2015; final manuscript received August 24, 2015; published online October 6, 2015. Assoc. Editor: Haofeng Chen.

J. Pressure Vessel Technol 138(2), 021201 (Oct 06, 2015) (11 pages) Paper No: PVT-15-1046; doi: 10.1115/1.4031507 History: Received March 20, 2015; Revised August 24, 2015

The geometric imperfections in high strength U-ing, O-ing and expanding (UOE) manufactured pipes are investigated in this paper using a high-resolution 3D surface scanner, and a reverse engineering and inspection software. The geometric analyses show that the initial imperfection patterns in the UOE manufactured pipes are not at all random, although the magnitudes of imperfections may vary across specimens. These patterns of outside radii and pipe wall thickness imperfections consistently appear along the length of the specimens regardless of their D/t ratios and manufacturer. The sources of these imperfections can potentially be traced back to the UOE manufacturing process.

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References

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Figures

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Fig. 1

(a) Paths followed while capturing photos for the photogrammetry model and (b) photogrammetry model of the uncoded targets on a pipe specimen

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Fig. 2

(a) Intersecting radial lines at a cross section of the pipe clamp and (b) measurement of wall thickness using a micrometer

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Fig. 3

Alignment of scanned specimens in Geomagic®

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Fig. 4

(a) Outside surface, (b) outside and inside surface near pipe edge, and (c) weld surface of a scanned specimen

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Fig. 9

OR Deviation patterns and angles subtended by the deviation waves

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Fig. 8

Imperfect shapes of ERW and UOE manufactured pipes approximated through ellipse

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Fig. 7

Measured wall thickness deviations of selected specimens

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Fig. 6

2D deviation spectrum at arbitrary cross sections of specimens from each D/t ratio group

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Fig. 5

(a) 2D cross-sectional deviation of pipe surfaces with and without the photogrammetry model and (b) comparison of the cross sections of girth weld surfaces with and without photogrammetry model

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Fig. 10

(a) U-ing, (b) O-ing, (c) expansion stages of the manufacturing process, and (d) arrangement of the expansion mandrels with respect to observed deviation waves

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Fig. 11

Typical wall thickness deviation patterns in the UOE manufactured pipes

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Fig. 12

Average thickness deviations against sample sizes measured by randomly sampling thickness values

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