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Tank cleaning

Uni recycling

Manual, semi-automatic and automatic tank cleaning

Many industries, especially oil production, refining and distribution, need to store liquids and in aboveground or underground storage tanks. for several reasons you’d better opt for tank cleaning time to time based on the products you store in them. But quite a few times it becomes important that you should clean your storage tank. Some of these occasions include:

  • Internal Inspections – When it is time for an internal inspection, your tank must be taken out of service, cleaned and prepared for an inspector to enter the storage tank.
  • Changing Products – If you plan to store a different product in your tank, a full tank cleaning might be necessary. If you are switching from an unrefined product to a refined product, like from crude oil to gasoline, you would need to remove all residue and impurities.
  • Tank Issues – If your tank has a mechanical failure, you likely won’t be able to repair it in service. Depending on the problem, you would need to empty your tank, clean it and make it vapor free before you are able to make the necessary repairs. Typically, the ultimate goal of a tank cleaning is to provide a safe environment for whoever is entering the storage tank after you, whether it is an inspector or a mechanical repair company.

Tank cleaning is a very delicate service which requires experience, know-how, responsibility, and professionalism. Uni-Recycling provides such a service for almost all types of storage tanks, using mobile installations and innovative solutions. We provide the three generally known tank cleaning methods (namely: Manual, Semi-Automatic, and Automatic tank cleaning). Method selection is challenging where many factors like tank type and size, stored material, sludge quantity and its physical properties, or frequency of tank cleaning are taken into account by our industrial cleaning division. The same team all the time works on modifications and alternatives to reach the best and most efficient possible results. So your tanks will be in good hands with us.

There are several safety concerns and hazards entwined with tank cleaning operations that bolds out the vital role of experience. These can include, but are not limited to:

  • fires or explosions
  • toxic gas and vapor releases
  • tanks, by nature, are confined spaces.
  • oxygen shortages and other physical dangers
  • exposure to radiation
  • environmental contamination

Uni-Recycling has accomplished numerous projects with zero accident record. We are proud of this accomplishment and tend to keep it this way.


PPE and taking vigorous safety measures. Usually, manual tank cleaning precedes tank interior inspection or it can be performed prior to non-destructive test.

As its name suggests, it mainly relies on trained tank cleaning operators who go inside the tank with proper breathing apparatus, extract the sludge and proceed with washing and cleaning services with high pressure equipment and tank cleaning chemicals chosen by our experts.

Efficiency of manual tank cleaning mainly depend on the team. Uni-Recycling enjoys teams of professionals with over 15 years of experience moving from one tank to another ensuring highest performance.


Our SEMI-AUTOMATIC CLEANING (STC) service relies on a remotely-controlled robot which is equipped with a cleaning cannon and a video camera for sludge removal and tank cleaning. Live video of inside the tank is sent to operator giving him directions for orientation and supervision which optimizes performance. It is a non-entry process that fulfills three major requirements at the same time: it improves HSEQ conditions, reduces costs and minimizes the client’s environmental impact.


AUTOMATIC (no man-entry) TANK CLEANING (ATC) is suitable for both fixed and floating roof tanks. Long story short, it is a method of recirculating inside the tank sludge a separation module in between, but it has enormous complexities.

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Uni recycling