Inspectioneering
Inspectioneering Journal

Remote Internal Inspection of Coke Drums

By Rick Clark at CIA Inspection Inc.. This article appears in the July/August 1995 issue of Inspectioneering Journal

Delayed coker vessels experience severe loading sequences as they are routinely filled with hot liquid product (approx. 9000° F) and quenched to ambient temperature in a relatively short time period. The industry trend is to shorten the operating cycle time and increase throughput of the unit. This typically accelerates the cumulative damage/aging of the drum. Large, non-uniform shell distortion is common over time, often leading to failures which require repetitive repairs.

CIA Inspection Inc. has developed a unique laser-based inspection program/technology aimed at obtaining the information necessary in order to increase the understanding of coke drums in operation via evaluation of actual physical changes over time. By combining internal contour profilings with high-resolution video imaging of the vessel ID surface, detailed visual inspections are performed without drum entry.

 

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