Failure Analysis of Weld Metal Cracking in Weld Joint of API 5L X 75 Pipelines Steel

  • Authors

    • Abbas Kamil ALrubaeiy
    • . .
    • . .
    2018-09-27
    https://doi.org/10.14419/ijet.v7i4.7.23037
  • API 5L X75, weld metal, cellulose electrode E6010, HACC, microvoide coalescence

  • The development of steel alloy which result thin walled, high strength API 5L X75 grade, a restricting parameter controlling widespread use of X75 is the susceptibility to weld metal tracks. The excellent weld ability of this grade of the pipe steel has enhanced the potential for the use of high strength cellulose consumable like E6010 in root pass welding, but the risk of hydrogen assisted cold cracking (HACC) is also increased because of the high strength weld metal. This investigation outlines , the use of grade (E6010) of commercial cellulose consumable to assess conditions leading to hydrogen assisted cold cracking in the diluted weld metal. The research contained clarification of the link among microstructure; preheat temperature and hardness amounts for the weld consumable and its effect on cracking susceptibility. The cracking morphology studies indicated that there are many ways in which the crack can propagate in the weld metal and HAZ region. The mode of cracking observed was microvoide coalescence.

     

     


     

  • References

    1. [1] Fairhurst W., Booussel A.J. and Laupresht.W.E. , welding of low carbon Mo- Nb and Mn – Nb X70 pipeline steel , 2nd International conference , London , November . 1979 .

      [2] ASM Hand book , "Welding , Brazing and Soldering " , ASM International , Materials Park , Ohio . 1991 .

      [3] Easterling .K., "Introduction to physical Metallurgy of Welding " , 2nd Edition , Butterworth Heinmann , Boston . 1992 .

      [4] Alam.N. ,Dunne D. and Barbaro F. , " Weld metal crack testing for high strength cellulosic electrodes " , WTIA , 45th Annual conference proceedings , Melbourne , November . 1997.

      [5] Beachem E. P. , Johnson H. and Stout D. R. , " Hydrogen and delayed cracking in steel weldments " , Welding research supplement , American Welding Journal , AWS , October . 1991.

      [6] Harasawa H.,Ikoma T. and Nmioka T., "Prevention of cold cracking in pipeline girth welding by use of high-cellulose electrodes ", Third International Conference in pipe welding , London , November .1986.

      [7] Signes G. E. and Howe P. , " Hydrogen assisted cracking in high strength pipeline steel ", Welding research supplement , American Welding Journal , August . 1988.

      [8] E.V. Chatzidouros ,V.J. Papazoglou , and D.I. Pantelis ," Hydrogen effect on alow carbon ferritic – bainitic pipeline steel " International Journal of Hydrogen Energy.2014.39:18498-18505 .

      [9] M.A. Mohtadi – Bonab , J.A.Szpunar and S.S. Razavi-Tousi, "Hydrogen Induced Cracking Susceptibility in different layers of a hot rolled X70 pipeline steel ", International Journal of hydrogen energy . 2013.38: 13831-13841.

      [10] Graville B.," Survey review of weld metal cracking ", Welding in the world . 1986.Vol.24,9(10): 190-198 .

      [11] Anwar Ul-Hamid,Hani M. Tawancy and Nureddin M.Abbas , " Failure of weld joints between carbon steel pipe and 304 stainless steel elbows", Engineering Failure Analysis . 2005.12 :181-191 .

      [12] Cesar R.F.Azevedo, " Failure Analysis of crude oil pipeline " Engineering Failure Analysis . 2007 .14:978-994 .

      [13] Mota J. M. and Apps R.L. , " chevron cracking – Anew form of hydrogen cracking in steel weld metals , weld research supplement , American Welding Journal ,AWS, July . 1982.

      [14] Manon A. , Alain K. and Vicent M.," short and long crack growth behavior of welded ferritic stainless steel ", procedia structural integrity . 2016. 2: 3515-3522 .

      [15] Harpuneet Singh, Gurinder Singh Brar and Harmeet Singh, " Failure behavior of structural square hollow section center welded Joint", Proceedings of the ASME 2014 Pressure Vessels and Piping conference ,Anaheim , California , USA, July, 2014 .

  • Downloads

  • How to Cite

    Kamil ALrubaeiy, A., ., ., & ., . (2018). Failure Analysis of Weld Metal Cracking in Weld Joint of API 5L X 75 Pipelines Steel. International Journal of Engineering & Technology, 7(4.7), 401-405. https://doi.org/10.14419/ijet.v7i4.7.23037