Research of metal of shut-off valve and pumping equipment parts after long-term operation

UDK: 62-213.6
DOI: 10.24887/0028-2448-2019-1-75-79
Key words: shut-off valves, case-shaped parts, stem, oil, oil products, long-term operation
Authors: V.I. Voronov (The Pipeline Transport Institute LLC, RF, Moscow), I.A. Flegentov (The Pipeline Transport Institute LLC, RF, Moscow), O.A. Zadubrovskaya (The Pipeline Transport Institute LLC, RF, Moscow), O.Yu. Zhevelev (The Pipeline Transport Institute LLC, RF, Moscow)

This article presents the results of studies of the main metal parts of pipeline valves and pumping equipment of domestic and foreign production, which have been used for over 30 years at the oil and oil products pipeline transport facilities of the Transneft system entities. The studies included determination of strength and viscoplastic properties, as well as metallographic studies of the base metal structure of case-shaped parts and stems of pipeline valves (slide valves, wedge valves, gate valves, check valves) and pumping equipment. According to the research results, the mechanical properties of the base metal of the parts after long-term operation were compared with the mechanical properties of the parts currently produced by domestic manufacturers.

An integral part of oil and oil products pipeline systems is pipeline valves and pumping equipment. Continuous improvement of the manufacturing process of shut-off valves, ensuring the mechanical characteristics of parts at a high level, is one of the key factors ensuring the reliability of the entire pipeline system as a whole. The purpose of this work was to determine the actual mechanical properties and microstructure of pumping equipment and valve parts after long-term operation and compare them with the technical requirements currently in force. The results of the analysis showed that the characteristics of materials of shut-off valves and pumping equipment parts currently produced, in general, exceed the characteristics of materials used in the manufacture of equipment that served as research subjects.

Based on the analysis of the research data results, it was concluded that the equipment currently manufactured has the best reliability targets.


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