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RYDALL VP Specialized Degreaser

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RYDALL VP Specialized Degreaser

The revolutionary and versatile RYDALL VP Specialized Degreaser provides a comprehensive cleaning solution for refinery process vessel cleaning and degassing that will reduce downtime, labor and water usage.

RYDALL VP  is a pH neutral degreaser that can be applied in circulation or vapor phase applications. In vapor phase applications, it will remove oil, gas, lower explosive limit (LEL), hydrogen sulfide (H2S) and benzene (C6H6 ) with the added benefit of cleaning hydrocarbon deposits in a single application. RYDALL VP  is also effective as a wetting agent additive to alkali or acidic solutions for chemical cleaning.


Additionally, your plant personnel or on-site contractor can safely use RYDALL VP  without the need to bring in specialized consultants or contractors. It is also biodegradable and provides a fast and effective formulation of surfactants that is powerful, yet safe for your personnel, equipment and our environment.

RYDALL VP Specialized Degreaser Cleaning Procedure:

The addition of chemicals to the saturated steam injection (meaning the vapor phase) enhances the steam to remove the unwanted contaminants in shorter time periods.

The general sequence of work using the vapor phase cleaning approach is as follows:

  • Determine the steam conditions
  • Attach a chemical injection nozzle to the saturated steam supply
  • Determine the amount of chemical to be used, and the chemical injection rate
  • Slowly warm up the equipment to be cleaned using the saturated steam supply
  • At target temperatures, begin injection of chemicals at the calculated flow rates
  • Perform testing on the steam condensate formed
  • Determine the end point of the vapor phase cleaning
  • Stop injection of chemicals
  • Let steam continue to purge systems
  • Shut down, cool, and air purge vessels
  • Isolate / blank the system as required
  • Inspect the cleaned vessels
  • Maintenance work to begin

RYDALL VP Specialized Degreaser Applications:

  • Amine Treater Units
  • Caustic Treaters
  • Coker Units 
  • Crude Units
  • Desalters
  • Ethylene Units
  • Flare Drums
  • Flare Systems
  • Gas Compression Systems
  • Hydrocracker Units
  • Hydrofiner Units
  • Oil Separators
  • Pipelines
  • Preheaters
  • Reformers
  • Sat Gas Units
  • Sour Water Strippers
  • Transfer Lines
  • Sulphur Recovery Units
  • Vacuum Units

How Vapor Phase Cleaning Works:

Initially the saturated steam with the vapor phase RYDALL VP will condense on the hydrocarbon residue coating the walls of the vessel, and start to increase the temperature of the residue. Once the residue is heated, the vapor phase RYDALL VP will penetrate the residue and condense on the metal surfaces of the vessel. The presence of the vapor phase RYDALL VP will cause the vessel’s metal surfaces to become water wet, and allows the hydrocarbon residues to be flushed more easily from the metal surface by the action of the steam condensate containing the RYDALL VP. Vapors, gases and volatile components will be carried out through the venting of steam, usually to the low point drains and plant flare header. The remaining hydrocarbon residues and sludge that accumulates in the bottom of the vessel will be emulsified by the steam condensate and vapor phase RYDALL VP that also runs down to the bottom.

Circulation Cleaning and Degassing:

The basic process for vessel and pipe cleaning and degassing involves an aqueous solution of RYDALL VP that is circulated at an elevated temperature through the specified equipment and associated piping. A procedure that utilizes RYDALL VP in a chemical circulation will remove the oil and sludge from all wetted surfaces and reduce benzene to less than 1 ppm, H2S to near zero and LEL to near zero.

RYDALL VP cleaning and degassing technology is the fastest, safest, most cost-effective solution for a wide variety of applications. RYDALL VP allows our customers to significantly reduce downtime for degassing and cleaning vessels and piping allowing you to get the unit on-line faster. Apex Engineering Products Corporation can provide comprehensive project planning services prior to your turnaround that can include pre-planning meetings, on-site inspections, detailed application procedures, estimated water & chemical usage and waste disposal recommendations.

RYDALL VP  comes in a highly concentrated, non-hazardous form and in a variety of containers sizes…

  • 5-gallon Jug
  • 55-gallon Drum
  • 330-gallon Tote

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Apex Engineering Products Corporation  |  1241 Shoreline Drive  |  Aurora, IL 60504  |  Tel: 800.451-6291 or 1.630.820.8888  |  Fax: 630.820.8886  |  Made in the U.S.A.

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