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Coker Tube Metal Temperature (TMT) Issues Making You Red Hot?

If you have worked around a delayed coker unit for any amount of time, you have heard some of the debates around fired heater fouling and tube metal temperature (TMT) as measured by welded on thermocouples. Let's talk about a few DO's and DON'Ts when it comes to this measurement.... more

Discussion on “Enhanced Flash Zone Design for Coker Fractionators”

Check out the article in this month's Hydrocarbon Processing (July 2017) entitled "Enhanced Flash Zone Design for Coker Fractionators" by Thomas, Spalding, Patel, and Varma from Bechtel (BHTS). It is the most clear revelation of some of the internals around the proprietary fractionator bottoms design by Bechtel, formerly owned by ConocoPhillips. This design aspect has been relatively top secret for many years. ... more

10x Life Improvement in Coke Drum Life Using Weld Overlay – Highlights from RefComm® Galveston 2017

I believe we are inching ever closer to resolving this issue once and for all. For those who suffer with cracking drums, this resolution cannot come soon enough. Until then, there is a great solution: weld overlay in problem areas. OK... many of you are thinking this is not new information. Yes, you are correct but...... more

Highlights from RefComm® Galveston 2017: Pay Attention to Furnace Crossover Temperature (XOT)

We had 50 refiners from 21 different plants represented in the Delayed Coker Advanced Process Training course at RefComm® Galveston 2017. Lots of different viewpoints were shared from all sizes and designs of equipment. One of the more exciting group exercises conducted was a simple benchmarking... more

Reliability of the Delayed Coker Structure Block Equipment

Reliability of the structure block equipment is covered in the Delayed Coker Operations and Reliability Training, a two-day course offered at RefComm® Budapest. Because there is so much equipment used to perform coke drum operations, to decoke the drums, and the nature of the cracked resid is to turn solid at lower temperatures and velocities, this area of the refinery stereotypically has a large maintenance backlog.... more

Remarkable Achievements in Coke Drum Reliability

One of the major reliability challenges that delayed coking operators face is the ability to avoid through-wall cracks in coke drums.... more

Eliminating Plugged Impulse Lines & Tapping Points

Ever get plugged taps on flow meters? Absolutely! Unit fresh feed, heater pass flow, recirculation system….etc. Any system with heavy oil and solids can have those tiny little impulse lines plug with coke or other solids. Over the years, we have seen all sorts of ways to remove those solids and minimize plugging. Just off the cuff, I can remember three: Continuous purge system, Portable pumper hand-cart, and Special block valves with rod through capability.... more

Severe Service Valves in Coker Drum Piping – Part 2

Experience of valve manufacturer in the area of Coker valve such as installation history, maintenance support engineering staff, automation support, sealing of valve(for example Sturdy... more

Severe Service Valves in Coker Drum Piping – Part 1

Coking is a refinery unit operation that upgrades material called bottoms from the atmospheric or vacuum distillation column into higher-value products and, as the name implies, produces petroleum coke, a coal-like material. Two types of coking processes exist—delayed coking and fluid coking.... more

D.D. Technology Inc.: Advanced Bidirectional Pigging

DDT is the originator and founder of Fired Heater Pigging. We have been in business for 26 years and the Owner / President has been granted 26 Patents and counting. We have successfully completed projects in 43 countries. The DDT Pigging System is the most advanced system for bidirectional pigging. DDT patented Piggs and Process increases run length and tube life, lowers fuel consumption and improves heater reliability. Bidirectional pigging allows our experienced operators to concentrate their cleaning efforts on contaminated areas only which prevents damage to areas that are... more

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