Journal of Failure Analysis and Prevention

, Volume 15, Issue 5, pp 641–650 | Cite as

Experimental and Numerical Study of Locally Reinforced Pipelines

Technical Article---Peer-Reviewed
  • 115 Downloads

Abstract

The safety of pipelines being repaired by local reinforcement methods such as welding a cap or patch is gaining attention. This paper describes experimental and numerical research conducted to assess loading capacity of these local reinforcement pipelines when subjected to internal pressure. Two full-scale hydrotests were performed on pipe sections removed from service. The strain variation and burst pressure were measured, and the strain concentrations and collapse loads were investigated. The results demonstrate that there is small difference between the two repaired pipe sections on the burst pressure. Strain output from both actual tests and finite element analyses shows that both repair methods do result in strain concentrations around the repair site, and that the patch method results in less strain variation and lower stress levels compared to the cap repair method.

Keywords

Burst test Locally reinforced pipeline Failure analysis Finite element analysis 

Notes

Acknowledgments

The work included in this paper is supported by the National Key Sci-Tech Major Special Item of China, under Award No. 2011ZX05017-004.

References

  1. 1.
    P. Jodin, Fracture mechanics analysis of repairing a cracked pressure pipe with a composite sleeve, in Safety, Reliability And Risks Associated with Water, Oil And Gas Pipelines, ed. by G. Pluvinage, et al. (Springer, Dordrecht, 2008), pp. 325–333CrossRefGoogle Scholar
  2. 2.
    API 570, Inspection, Repair, Alteration, and Rerating of In-service Piping Systems (API, Washington, 2006)Google Scholar
  3. 3.
    A. Keith Escoe, Piping and Pipelines Assessment Guide, Chap. 6, Repairs Involving Hot Work (Elsevier, Burlington, 2006), pp. 363–367Google Scholar
  4. 4.
    China National Petroleum Corporation, Repair Maintenance Technology Specification for Oil-Gas Pipeline, Q/SY 2012-43 (China National Petroleum Corporation, Beijing, 2012)Google Scholar
  5. 5.
    Evaluacion de las causas de tres fallas en gas pipeline norte, Report GIE 8-10/97 (Transportadora de Gas del Norte SA, Argentina, 1997)Google Scholar
  6. 6.
    J.F. Kiefner et al., Failure Analysis of Pipelines ASM Handbook (ASM, St Paul, 1997)Google Scholar
  7. 7.
    P.G. Fazzini, J.L. Otegui, Influence of old rectangular repair patches on the burst pressure of a gas pipeline. Int. J. Press. Ves. Pip. 83, 27–34 (2006)CrossRefGoogle Scholar
  8. 8.
    J.L. Otegui, Challenges to the integrity of old pipelines buried in stable ground. Eng. Fail. Anal. 42, 311–323 (2014)CrossRefGoogle Scholar
  9. 9.
    Inspection and Quarantine of PRC, Metallic Materials-Tensile Testing at Ambient Temperature, GB/T 228, General Administration of Quality Supervision (Inspection and Quarantine of PRC, Beijing, 2002)Google Scholar
  10. 10.
    X.K. Zhu, B.N. Leis, Strength criteria and analytic predictions of failure pressure in line pipes. Int. J. Offshore Polar 14, 125–131 (2004)Google Scholar
  11. 11.
    ASME, ASME Boiler and Pressure Vessel Code, Sect. III, Division 1 (ASME, New York, 2013)Google Scholar
  12. 12.
    ASME, ASME Boiler and Pressure Vessel Code, Sect. VIII, Division 2 (ASME, New York, 2004)Google Scholar
  13. 13.
    D. Mackenzie, H.J. Li, A plastic load criterion for inelastic design by analysis. J. Press. Ves. Technol. 128, 39–45 (2006)CrossRefGoogle Scholar
  14. 14.
    Abaqus/CAE User’s Manual, Version 6.12’ (Dassault Systèmes, Providence, 2012)Google Scholar

Copyright information

© ASM International 2015

Authors and Affiliations

  1. 1.Faculty of Mechanical and Transportation EngineeringChina University of PetroleumBeijingChina
  2. 2.SINOPEC Science and Technology DevelopmentBeijingChina
  3. 3.Zhongyuan Petroleum Prospecting and Design InstitutePuyangChina

Personalised recommendations