Case History

Canadian petroleum refinery saves three days of outage time by reducing multiple turnarounds utilizing our family of chemicals

Results Achieved

Process saved 3 days of outage time by reducing multiple turnarounds into one project
No delays in schedule,
and only standard PPE
required for vessel entry
No additional expenses
required for supplied air equipment and manpower

Chemicals Utilized

Award-winning asphaltene dispersant and anti-foulant


Rapid absorption and encapsulation of vapor-state hydrocarbons

FQE LEL-Surface

Patented product for cost-effective hard surface cleaning and hydrocarbon vapor absorption

H2S scavenger for the rapid and permanent elimination of H2S

Non-hazardous product for effective control of pyrophoric iron deposits

A petroleum refinery located in Eastern Canada used FQE® Solvent-H, FQE LEL-Vapor, FQE LEL-Surface, FQE H2S Scavenger, and FQE Pyrophoric to decontaminate and degas their crude unit.

This was the first vapor-phase application where the entire unit was to be degassed and decontaminated simultaneously. Previously, the client had broken down the unit into individual critical path vessels with each degassing operation taking place over 48-hours. The entire crude unit would typically take a total of 4 days. Using our process, it took a total of 24-hours to fully degas the entire crude unit.

FQE Solvent-H was vapor-phase injected into the Crude Column, Vacuum Heater, and Vacuum Column for 6-hours as part of the preliminary decontamination process to target the heavy oils and sludges.

Following the preliminary injection, all equipment was cleaned by vapor-phase steam injection with our FQE H2S Scavenger, FQE LEL-Vapor, and FQE LEL-Surface products. During the final hours of the degassing step, the system was then treated with FQE Pyrophoric to deactivate the iron sulfide scale.

After a total of 24-hours of chemical injection, all critical path equipment was successful degassed with no LEL’s arising from light end hydrocarbons or hydrogen sulfide present on analysis. Furthermore, upon breaking containment there was no iron sulfide scale combustion encountered.

Manpower designated for vessel entry entered without any delays, minimum PPE, and no additional expenses were required for supplied air operations. 

Scope of Work

The crude unit scope consisted of the following major equipment and all interconnecting piping:


Group 1: Crude Column

  • Crude Heater
  • Crude Column
  • Kerosene Stripper
  • Diesel Stripper
  • Crude Overhead Receiver

Group 2: Debutanizer & Splitter

  • Debutanizer Column
  • Debutanizer Overhead Receiver
  • Splitter Column
  • Splitter Overhead Receiver
  • Crude Overhead Receiver

Group 3: Vacuum Column

  • Vacuum Heater
  • Vacuum Column
  • Ejector Vapor
  • Knock-out Drum

Group 4: Others

  • Kerosene Water
  • Settling Drum
  • Desalter Water Drum
  • Debutanizer Charge Drum
  • Compressor Suction Drum
  • Skimmed Naphtha Drum

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