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Determination of the Failure Mode and the Rupture Pressure in a Mechanically Damaged Pipeline

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Abstract

The following case study outlines metallurgical, finite element, and fracture mechanics analyses conducted to determine the cause of a pipeline rupture that resulted from prior external damage. Metallurgical and fractographic analyses indicated that the rupture initiated from a shear crack caused by mechanical damage, and that the fracture mode was overload; no indication of progressive growth was observed. Stress and fracture mechanics analysis indicated that the pipe ruptured at a pressure below the maximum allowable operating pressure.

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Notes

  1. NASCRAC is a trademark of Exponent, Inc.

References

  1. Maxey, W.A.: Technol. Oil Gas J., 15, 41–50 (1987)

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  2. API 5LX: High-Test Line Pipe. American Petroleum Institute (1963)

  3. ASTM E1820: Standard Test Method for Measurement of Fracture Toughness. ASTM (2001)

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Authors and Affiliations

  1. Exponent Failure Analysis Associates, Menlo Park, CA, USA

    B. A. James, R. A. Sire & R. D. Caligiuri

Authors
  1. B. A. James
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  2. R. A. Sire
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  3. R. D. Caligiuri
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Correspondence to B. A. James.

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James, B.A., Sire, R.A. & Caligiuri, R.D. Determination of the Failure Mode and the Rupture Pressure in a Mechanically Damaged Pipeline. J Fail. Anal. and Preven. 8, 223–230 (2008). https://doi.org/10.1007/s11668-008-9144-7

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  • DOI: https://doi.org/10.1007/s11668-008-9144-7

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