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Coker Units

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Coker Units or Cokers, are pieces of oil refinery processing equipment used to recover specific elements from process residues, tar pitch, and residual oils.

The coking process involves what is known as cracking; where long chains of hydrocarbons are broken down into shorter chains by heating them to their thermal cracking temperature in a furnace. In the coking unit, residual oil from the vacuum distillation column or the atmospheric distillation column is processed into hydrocarbon gases, naphtha, light and heavy gas oils, and petroleum coke.

There are three types of cokers used in refineries: delayed cokers, fluid cokers and flexicokers. Of the three, the delayed coker unit (DCU) is by far the most common and involves several drums working in tandem.

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Articles about Coker Units
March/April 2018 Inspectioneering Journal

Hot spots – localized areas of overheating in pressure equipment – can lead to deformation or even loss of process containment. It is important to understand the effects of elevated temperature caused by hot spots on the mechanical integrity of...

January/February 2016 Inspectioneering Journal

The enormous decline in oil prices over the past 14 months has definitely slowed projects and changed the energy and production landscape. Despite this, refineries, petrochemical plants, and chemical facilities must continue to run safely,...

Authors: Greg Alvarado
January/February 1997 Inspectioneering Journal

This is Part II of a series of reliability of coke drums. Part I discussed some of the causes of bulging and cracking in coke drums. Here, the effect of operation on damage will be covered, along with possible solutions for increasing drum life...

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    White Papers related to Coker Units
      Sponsored White Paper

      This white paper from the experts at Quest Integrity discusses how through the application of ADCV, facilities are able to use data-driven solutions to reduce decoking times and reveal unexpected operational issues and validate cleaning efforts.

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