Change in stress-strain state ECU furnace coils during operation

• Main Authors: Zakirnichny, Evgeniy, Berdin, Valeriy, Rubtsov, Aleksey, Dementev, Valeriy
• Format: Conference Proceeding
• Language: English
• Subjects: Algorithms; Coils; High temperature; Mechanical properties; Pyrolysis; Service life; Strain; Stress concentration; Stress-strain relationships; Unevenness
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0196732

Pyrolysis furnaces in petrochemical plants are operated in some of the most unfavorable conditions in terms of elevated temperatures. The complex thermal power loading of the coil during operation and the unevenness of this loading negatively affect the service life of the coil pipes and largely predetermine the residual life. During the operation of the coil, it is possible to develop a variety of options that lead to premature failure of the coil. This is the occurrence of various defects, and the deterioration of the mechanical properties of the metal, and the occurrence of zones of concentration of increased stresses, etc. The regulatory documentation describes in detail the algorithm for diagnosing and standards for rejecting furnace coils. As a rule, the key aspects and criteria are non-destructive and destructive types of testing, as well as strength calculations. However, the current methods for assessing the technical condition of furnace coils do not include work on modeling coils and assessing the stress-strain state considering degradation during operation. In this regard, the studies on the change in the stress-strain state of the pyrolysis furnace coil during operation are relevant.