Journal of Failure Analysis and Prevention

, Volume 15, Issue 4, pp 563–570 | Cite as

Failure Analysis of Butt Weld of Bimetal Composite Pipes

  • Hao Chen
  • Huizhen Ma
  • Xiaomin Chen
  • Shengfei Jiang
  • Huaijie Wang
Technical Article---Peer-Reviewed


The study aims to summarize the main failure morphology of butt weld of bimetal composite pipes which are used in a gathering pipeline of one condensate gas field with high temperature and high pressure, and then analyze the failed pipes with the methods such as SEM, energy spectroscopy, and metallographic examination. The experiments show that there is no Mo which is the key element of metal material to resist the pitting corrosion and stress corrosion in the organization of the welds. Through the microscopic morphology analysis it shows that the process of the gradual shedding of corrosion product film gives rise to the failure of pipelines. The gradual shedding of corrosion product will expose the new matrix to the corrosive environment which will accelerate further erosion. The cycle of the erosion continues and eventually leads to pipelines’ leakage. The weld residual stress plays an essential role in the weld failure, besides, the existence of the residual stress will accelerate the collapse of the passivation film. The factors which lead to the weld failure are the special structure, organization of the weld, corrosive media, and the residual stress of the weld. In view of the failure situation, we put forward the corresponding suggestions as follows.


Corrosion Bimetal composite pipe Weld Failure analysis Experiment 


  1. 1.
    J. Gu, Use and production method of bimetallic clad steel tubes overseas. Shanghai Iron 22(4), 16–24 (2000)Google Scholar
  2. 2.
    G. Xiao, Stainless steel, carbon steels multiple tube production technology. Metall Sichuan 1, 58 (2000)Google Scholar
  3. 3.
    M.A. Spence, C.V. Roscoe, Bi-metal CRA-lined pipe employed for North Sea field development. Oil Gas 97(18), 80 (1999)Google Scholar
  4. 4.
    S. LI, Practical Technology of Long Distance Pipeline Welding (Chemical Industry Press, Beijing, 2009), pp. 85–107Google Scholar
  5. 5.
    H. Chen, Analysis of well-head facilities failure. Nat. Gas Ind. 24(7), 65–67 (2004)Google Scholar
  6. 6.
    G. Hu, C. Xu, X. Zhang, Composition and structure of the passive film of 304 stainless steel in an occluded solution. J. Beijing Univ. Chem. Technol. 30(1), 20–23 (2003)Google Scholar
  7. 7.
    S. Jiang, Failure Analysis of the Butt Weld of Bimetal Composite Pipes of 20G/316L (Southwest Petroleum University, Chengdu, 2013)Google Scholar
  8. 8.
    Z. Wang, H. Xu, K. Guan et al., Chemical Equipment Failure Theory and Case Analysis (East China University of science and technology press, Shanghai, 2010)Google Scholar
  9. 9.
    H. Zang, Y. Zhang, Y. Zhou et al., Corrosion failure analysis of composite pipe welds. Energy Conserv. 7, 23–26 (2010)Google Scholar
  10. 10.
    H. Chen, S. Jiang et al., Failure analysis of oil-gas transportation pipelines in a high temperature and high pressure gas field containing CO2. Corros. Prot. 34(2), 185–188 (2013)Google Scholar
  11. 11.
    X. Tan, Study on Stresses and Strain of Steel Structure of Modern Architecture of Bolt and Weld (Nanjing University of Science and Technology, Nanjing, 2012)Google Scholar
  12. 12.
    H. Asteman, J.E. Svensson, M. Norell, L.G. Johansson, Influence of water vapor and flow rate on the high-temperature oxidation of 304L effect of chromium oxide hydroxide evaporation. Oxid. Met. 54(1–2), 11–26 (2000)CrossRefGoogle Scholar
  13. 13.
    M. Zhagn, Chloride-induced stress corrosion cracking analysis of TP321H stainless steel pipeline. Petro-Chem. Equip. 39(4), 100–102 (2010)Google Scholar

Copyright information

© ASM International 2015

Authors and Affiliations

  • Hao Chen
    • 1
  • Huizhen Ma
    • 1
  • Xiaomin Chen
    • 1
  • Shengfei Jiang
    • 2
  • Huaijie Wang
    • 3
  1. 1.School of Mechatronic EngineeringSouthwest Petroleum UniversityChengduChina
  2. 2.Southwest Oil and Gas Field in Southern Sichuan Gas FieldLuzhouChina
  3. 3.Guyun Middle School of ShenxianLiaochengChina

Personalised recommendations