<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the pipe fragment cut during the repair of the “Soyuz” gas main after 30 years of operation. It is shown that the pipe steel slightly changes its properties when the gas main is operated under the influence of working stresses and environmental factors. Structural degradation and micro-defects accumulated in the pipe wall were scattered, indicating that the material retains sufficient plasticity that allows it to resist fracture processes and the nucleation of macrocracks.</p></abstract>

The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the pipe fragment cut during the repair of the “Soyuz” gas main after 30 years of operation. It is shown that the pipe steel slightly changes its properties when the gas main is operated under the influence of working stresses and environmental factors. Structural degradation and micro-defects accumulated in the pipe wall were scattered, indicating that the material retains sufficient plasticity that allows it to resist fracture processes and the nucleation of macrocracks.

Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation

Ternopil Ivan Pul’uj National Technical University

Ivano-Frankivsk National Technical University of Oil and Gas

National University of Life and Environmental Sciences of Ukraine

KOM – Corrosion and Material Protection Journal

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The basic regularities in deformation and fracture of pipe steel X65 are revealed by testing specimens from the pipe fragment cut during the repair of the...

Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation

Published Online: Aug 06, 2018

Page range: 78 - 82

DOI: https://doi.org/10.1515/kom-2018-0011

© 2018 Maruschak P. et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.