In-Service Degradation of the Mechanical Properties of the Metal of an Ammonia Pipeline

We analyze the regularities of changes in the mechanical characteristics of the metal of the Tol’yatti–Odessa ammonia pipeline for 30 yr of operation. Under the action of the medium, mechanical loads, and, in addition, temperature drops (for the pipes placed on the surface), the metal degraded, whic...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2014-01, Vol.49 (4), p.525-531
Main Authors: Arkhypov, O. H., Nikhaenko, Yu. Ya, Borysenko, V. A., Khoma, M. S., Lyubymova-Zinchenko, O. V.
Format: Article
Language:English
Subjects:
Ammonia
Analysis
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and anti-corrosives
Degradation
Exact solutions
Hydrogenation
Maintenance
Materials Science
Mathematical analysis
Mechanical properties
Pipe lines
Pipelines
Repairing
Solid Mechanics
Structural Materials
Time dependence
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Summary:We analyze the regularities of changes in the mechanical characteristics of the metal of the Tol’yatti–Odessa ammonia pipeline for 30 yr of operation. Under the action of the medium, mechanical loads, and, in addition, temperature drops (for the pipes placed on the surface), the metal degraded, which was accompanied by corrosion damage and hydrogenation. We propose an analytic expression for the description of the time dependence of strength of the metal that may serve as an instrument for the transition from “scheduled overhauls” to “as-required repairs.”
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-014-9645-3