Фізика і хімія твердого тіла (Feb 2024)

Influence of long-term operation on the properties of main gas pipeline steels. A review

  • L.I. Nyrkova,
  • S.O. Osadchuk,
  • L.V. Goncharenko,
  • A.O. Rybakov,
  • Yu. O. Kharchenko

DOI
https://doi.org/10.15330/pcss.25.1.191-202
Journal volume & issue
Vol. 25, no. 1
pp. 191 – 202

Abstract

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Underground pipelines during operation are affected by mechanical and corrosive factors. The susceptibility of cathodically protected pipe to hydrogen degradation increases, which contributes to stress-corrosion cracking. It is believed that the main factor in pipeline steels degradation is deformation aging, which increases strength and reduces plasticity. Volume microdamages also develop in long-time exploited steels. But in many cases, the base metal and welded joints of long-term operated pipelines retain satisfactory performance. Due to the high value of viscosity and plasticity of the metal in an as-received state, the metal state of long-term operated gas pipelines can be considered satisfactory.

Keywords