REFINERY MAINTENANCE

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OIL REFINERY COKE DRUM SKIRT HOLES & SLOT CUTTING
Coke Drum Units (CDU) produce high calorie coke (Petroleum coke). However, the expectant lifetime averages 8 years.
In a typical CDU production cycle, the temperature can raise to as high as 400 degree. Due to high production demand, the filling and cooling cycle get shortened, causing stress and fracturing on the structures of the skirt, thereby reducing the CDU lifespan.
In order to reduce the tension on the structure of the skirt, perforated slots on the carrier skirt plates are created via a patented method created by CNC World.
By doing so, the perforated slots will minimize the stresses on the skirt plate and structure, thereby prolonging the lifespan of the CDU to as many as 16 years.
We successfully completed this process at the Coke Drum Unit at TUPRAS İzmit Refinery in April 2019.
Coke Drum at TUPRAS refinery was approved by Coke Drum Insurance Company WOOD PLC.