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  • Writer's picturePlasTech Services Inc.

Repairing Bleach Tanks

Repairing Bleach Tanks: A Comprehensive Overview for PlasTech Services, Inc.

At PlasTech Services, Inc., we understand the importance of providing comprehensive maintenance services to industrial industries that rely on bleach tanks. Typically made of Fiberglass (FRP), these tanks are essential components in industrial processes and require a diligent repair process to ensure their longevity and reliability. Bleach, otherwise known as sodium hypochlorite, is a toxic chemical that corrodes FRP tanks over time.

Making Repairs

When it comes to repairing a bleach tank (sodium hypochlorite), the most important thing is to identify the cause of the damage. Depending on the type of material used for construction, this can be anything from physical damage caused by an object striking the tank wall to chemical corrosion caused by repeated exposure to strong alkalis such as sodium hypochlorite. Is the damaged exterior, interior, or located at an ancillary location?

Points of Failure

We often see point-of-failure tanks at the following locations: Nozzles, Pipe Connections, and Manways. Other areas of failure can be the internal lining of the tank, requiring a patch or a reline, or external damage caused by UV exposure, blooming, or physical damage caused by being struck by an object (like a forklift).

Assessing FRP Tanks

Fiberglass tanks tend to be one of the more common materials used for bleach storage and processing, due in part to their durability and resistance to many corrosive agents such as acids and alkalis. However, even fiberglass tanks can become damaged over time due to mechanical stress or corrosion-induced wear and tear. If this occurs, then the affected area will need to be properly assessed before any repairs can begin. This usually involves assessing both the structural integrity and chemical composition of the affected area in order to determine what kind of repairs are necessary, if any at all.

Check out our detailed Fiberglass Tank Inspection Posts here: Fiberglass Tank Repair – How to Inspect a Fiberglass Tank

The Chlorine Institute writes, "The tank should undergo a visual exterior inspection for corrosion or signs of leakage every two years. Particular attention should be placed on nozzle welds. Spot removal of insulation is suggested at vulnerable areas such as nozzles and tank bottoms."

Rob Baur, senior operations analyst at Clean Water Services (Hillsboro, Ore.), notes, "Fiberglass tanks often are used, but they must be made of the proper resin and be cleaned and inspected every 3 to 5 years to monitor deterioration and repair damage."

The Maine Center for Disease Control and Prevention prescribes an inspection and repair schedule every five years.

It is recommended that tanks be visually inspected every 2-5 years.

Prepare for the Repair

Once any damaged areas have been identified and assessed, then it’s time for actual repairs. These can range from simple patching with FRP patches and epoxy coatings, or more intensive repairs involving complete replacement sections or a full tank reline if needed. Costs can be cut when performing a bulk tank reline. If you're considering a fiberglass tank repair, Check out this article, "Preparing For A Fiberglass Tank Repair."

Regardless of what kind of repair is necessary however, it is always important that all repairs are done correctly following industry standards so as not put anyone’s safety at risk due to improper installation or weak spots in repaired areas within the tank itself.

At PlasTech Services Inc., our experienced team members understand how important these tanks are for your operations which is why we strive hard every day not just meet but exceed industry standards when it comes repairing bleach tanks with precision and care. Our attention to detail ensures that your repaired tank will provide reliable performance for many years into the future without causing issues due to improper installation or weak spots that could put you at risk during operation or inspection times - so give us a call today!

Call Now!

Phone: 1-410-737-4700

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