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Metal Science and Heat Treatment

, Volume 59, Issue 9–10, pp 669–672 | Cite as

Analysis of the Causes of Failure of a Pipeline Welded Joint

  • Yu. A. Chirkov
  • V. M. Kushnarenko
  • V. S. Repyakh
  • E. Yu. Chirkov
Article
  • 56 Downloads

An annular welded joint of a pipeline from steel 17G1S with diameter 1020 mm transporting natural gas at a pressure of 5.5 MPa is studied. The residual welding stresses are determined after failure of the pipes. Results of a study of fracture surfaces and of a metallographic analysis of the region of the welding defect over which the fracture has developed are presented. Mechanical tests of the pipe metal and of the metal of the welded joint are performed. The causes of failure of the joint are considered and methods for raising the reliability of pipelines are recommended.

Key words

pipeline welded joint stress flaw failure 

References

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Yu. A. Chirkov
    • 1
  • V. M. Kushnarenko
    • 1
  • V. S. Repyakh
    • 1
  • E. Yu. Chirkov
    • 2
  1. 1.Orenburg State University (OSU)OrenburgRussia
  2. 2.“Tekhnopark OSU”OrenburgRussia

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