Water Tank Inspections
Storage tanks and water towers require periodic inspections, cleanings, and maintenance to maintain proper water quality as well as longevity of the equipment. Depending on location, conditions, and type of tank or tower, inspections should be performed every one, three, or five years. Maintenance should be performed based on inspection findings. As a company with a culture focused on safety and customer satisfaction, Pittsburg Tank & Tower Maintenance knows the importance of staying up to date with OSHA, AWWA, NFPA, TCEQ, FM, API, and many other codes.
PTTG offers dry, dive and ROV inspections. As the name implies, dry inspections are conducted when the tank is dry and has been taken out of service. Dive and ROV inspections are performed with the tank still in service. Regardless of what method is used, our qualified inspectors will conduct paint mil thickness, ultra-sonic testing for metal thickness, cross hatch testing for adhesion, and test for the presence of lead in paint during each inspection. Fully detailed reports, full of pictures and recommendations will also be sent to the customer. ROV inspections also come with a video of the inspection.
Routine tank inspections help operators keep track of their tank’s interior condition, for example, if the interior lining needs replacing. Interior linings deteriorate over time. As the tank heats up and cools down depending on the season, the epoxy becomes brittle, cracks, and flakes off – exposing steel to water. The vapor zone is the area between the high-water line and the tank’s roof. It tends to see a lot of moisture and chlorine vapors. It will deteriorate steel that is not coated extremely fast.
Water tank interiors should be regularly recoated. The lining should also be installed and regularly replaced inside the tank since the water lapping against the tank’s walls will eventually cause it to deteriorate. Pittsburg Tank & Tower Maintenance Co. can install passive cathodic protection in the form of a Zinc disc that sacrifices itself if some type of corrosion occurs. The Zinc discs can be replaced.
Water tank exteriors should also be recoated regularly. The sun’s ultraviolet rays beat down on a water tank, causing the paint to fade and break down over time. Acidic bird droppings will also eat away at the paint, leaving open spots prone to rusting.
Operators can have isolated spots sanded down and touched up with paint. However, if the decay is too advanced, it will require fresh coats of paint. The tank would need to be stripped of its existing coating and repainted with two or three coats of epoxy and NSF epoxy.
Tanks should be cleaned out every three or five years, depending on the location, conditions and type of tank. Regular tank cleaning will get rid of sediment and buildup. Would you want to drink out of a water tank that has a foot or more of dirt, mud and other particles sitting at the bottom of it? Probably not, but many tanks will accumulate this much sediment if tank cleaning is not performed regularly.
Pittsburg often uses remotely operated underwater vehicles to clean water tanks. This allows the tank to remain in service. ROVs can be used in most cases as long as the sediment is not a foot deep or more. Dry cleanouts demand that the tanks be drained before any cleaning begins. Dive cleanouts are available too.
Keeping your tank maintained helps reduce expenses in the long run. Regular inspections and maintenance help keep a storage tank operating for decades or even a century. So, yes, while there is an investment in keeping a tank in good working condition, it’s a lot cheaper than having to buy a new tank or a few new tanks in that same time span.
Types of Water Tank Inspections
Storage tank maintenance and inspections are performed by dry inspection, remote operated vehicle (ROV) or dive inspections.
Dry inspections: Performed while the tank is empty.
We verify the integrity of your tank, including any noncompliance issues, like ultrasonic, mil thickness, lead check, and crosshatch testing. We can also perform vacuum box testing on floors to identify potential leaks.
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- Ultrasonic tests determine the thickness of steel. Various areas of the tank are tested and recorded for each ring of the tank as well as the roof.
- Mil thickness tests will reveal how well your paint system is holding up.
- Lead check tests will determine if lead-based paint has been applied to the tank.
- crosshatch testing is another method used to determine the integrity of your paint system.
- Vacuum box testing can be performed in dry tank inspections to identify leaks on the tank floor.
Remote vehicle inspections: Performed by robotic submersible cameras, which follow the same basic criteria as our dry inspections without taking the tank out of service.
Dive inspections: When necessary for inspection, cleanout or minor repairs, divers can be dispatched to your location. Our certified divers from Liquid Engineering Corporation (a PTTG company) will take care of any dive needs.
Cleanouts: Dive, ROV or dry cleanouts. Dive and ROV cleanouts performed while tank is still in service.
Importance of Storage Tank Maintenance
Storage tank maintenance and water tower maintenance are essential for protecting the performance and longevity of your storage tank.
Regular water tank inspection allows for the identification of existing and potential failures, so maintenance and industrial water tank repairs can be performed, limiting ongoing damage. Infiltrations allowing contamination, corrosion, delamination of coatings, and other tank or tower issues are corrected, improving tank or tower performance and reducing costs associated with performing more extensive repairs when inspections are overlooked.
Routine cleaning and storage tank maintenance reduces the risks that negatively impact water or other fluid quality, as well as the integrity of the tank. Bacterial growth and sediment build-up are minimized protecting the tank’s interior lining, reducing costs associated with recoating.
Overall, storage tank and water tower maintenance will protect your equipment and keep it in service longer. Resolving tank issues as soon as possible eliminates costly repairs when damage becomes more significant and safeguards your water supply. Utilizing professional storage tank maintenance services is an important investment in your business, your equipment, and your bottom line.
Request a Quote for Storage Tank Inspection Today
Keep your storage tank well maintained for improved performance and reduced costs. The team at Pittsburg Tank & Tower Group provides the professional storage tank inspection and water tower inspection services that boost efficiency and keep your equipment in service longer. Please contact us to learn more about how our services can benefit your business and equipment.