Coke Drum Skirt Analysis and Retrofitting
Cracking of conventional welded skirts occurs to due fatigue damage induced by cyclic thermo-mechanical stresses that develop during the course of the coking cycle. If adequate temperature measurements are available, these stresses can be calculated and fatigue life can be estimated with reasonable accuracy using the finite element analysis technique. Industry surveys suggest that once cracks develop, it is difficult to stop their recurrence without modifying the design of the skirt.
HES staff have a long history of analyzing coke drum skirts under severe mechanical and transient thermal loads using several fatigue analysis techniques. We also have the experience of developing practical solutions for remediation of these cracks.
HES staff developed and oversaw the implementation of the first skirt retrofit of its kind in industry history in which a conventional welded skirt was converted to a non-welded configuration during a scheduled shutdown. In addition, the first implementations of HES patented tongue-in-groove skirt and patented skirt anchor blocks have been successfully completed.
Please see articles in the Resources section of this website for more information.
HES staff have a long history of analyzing coke drum skirts under severe mechanical and transient thermal loads using several fatigue analysis techniques. We also have the experience of developing practical solutions for remediation of these cracks.
HES staff developed and oversaw the implementation of the first skirt retrofit of its kind in industry history in which a conventional welded skirt was converted to a non-welded configuration during a scheduled shutdown. In addition, the first implementations of HES patented tongue-in-groove skirt and patented skirt anchor blocks have been successfully completed.
Please see articles in the Resources section of this website for more information.
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