Shell bulging and cracking in coke drums have been documented for decades. Most of the literature on the subject attributes these failures to severe spatial and temporal thermal gradients that develop during the quench part of the operating cycle. While transient thermal gradients can be severe and can cause excessive stresses, they alone cannot explain all types of observed shell damage in drums. In this paper, the authors present and discuss observations that suggest that when a cooling shell contracts during quenching, the interaction of the cooling shell with the in-situ coke in the drum can induce substantial hoop and axial stresses in its wall. The manner and degree to which this resistance plays a role in causing damage appears to depend on the type of coke produced and the way drums are operated.
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ASME 2017 Pressure Vessels and Piping Conference
July 16–20, 2017
Waikoloa, Hawaii, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5794-6
PROCEEDINGS PAPER
The Significance of Coke Resistance in Coke Drum Failures
Mahmod Samman,
Mahmod Samman
Houston Engineering Solutions, LLC, Houston, TX
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Brian Doerksen
Brian Doerksen
Bechtel Hydrocarbon Technology Solutions, Inc., Houston, TX
Search for other works by this author on:
Mahmod Samman
Houston Engineering Solutions, LLC, Houston, TX
Brian Doerksen
Bechtel Hydrocarbon Technology Solutions, Inc., Houston, TX
Paper No:
PVP2017-65060, V03AT03A001; 6 pages
Published Online:
October 26, 2017
Citation
Samman, M, & Doerksen, B. "The Significance of Coke Resistance in Coke Drum Failures." Proceedings of the ASME 2017 Pressure Vessels and Piping Conference. Volume 3A: Design and Analysis. Waikoloa, Hawaii, USA. July 16–20, 2017. V03AT03A001. ASME. https://doi.org/10.1115/PVP2017-65060
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