Water tank inspection services ensure that your potable water storage tanks are as clean and safe as possible, reducing risks to your employees, processes, and equipment.
Water tank inspection services are critical in industries that rely on potable water storage tanks for drinking, washing, food preparation, and industrial applications.
Water storage tanks hold and store clean water produced by filtering systems until it is needed. They are available in a variety of designs, sizes, and performance capabilities, depending on the application’s requirements. They play an important role in many processes in the industrial, commercial, and municipal sectors, making a proper selection, installation, and maintenance critical.
Why Is Water Storage Tank Maintenance Important?
A water storage tank is a valuable asset for facilities that invest in one, and it, like other critical equipment, requires regular maintenance. Maintaining it properly provides a number of advantages, including:
- Longer service life. Tank inspection and maintenance operations that are scheduled on a regular basis allow industry professionals to identify existing damage and potential sources of damage before they become major issues. This, in turn, reduces the negative impact on the tank’s integrity.
- Better equipment performance. As problems are identified and resolved, the system’s performance improves.
- Higher water quality. Repairing problems in the water storage tank and its connected system reduces the risk of contamination and other negative effects that can affect the quality of water in potable water tanks.
- Lower repair and replacement costs. By detecting issues such as corrosion or coating delamination before they become major issues, equipment damage is reduced, resulting in fewer costly repairs and replacements.
Water Storage Tank Inspection Techniques
The first step in any maintenance procedure is to inspect the equipment’s condition. Water storage tank inspections can be classified as wet or dry.
Dry inspections, as the name implies, require the tank to be drained of water before they can be completed by a licensed specialist.
Wet inspections are performed without the tank being emptied. Depending on the tank, a disinfected diver or a remotely operated vehicle (ROV) enters the structure to identify potential problems. If significant problems are discovered, such as peeling paint or thinner steel, the tank must be removed from service for repairs.
Inspections, regardless of method, typically begin at the bottom of the tank and work their way up to the legs, rods, struts, and ladder. Tank conditions to look for include the thickness of the steel, the thickness of the paint, and the adhesion levels of the coating.
Maintenance Requirements for Water Storage Tanks
To ensure structural and sanitary integrity, the American Water Works Association (AWWA) recommends that tanks be inspected and maintained on a regular basis. While the frequency of inspections varies depending on a number of factors such as location, operating conditions, and the type of equipment used, the organization, along with other industrial companies and agencies, provides the following guidelines:
Inspections should be performed every one, three, or five years (depending on the tank application). During these operations, every system component, including the paint, is evaluated. Because paint protects steel tank components from corrosion, flaws in the painted surface can jeopardize the steel’s integrity as well as the quality of the water.
If the system exhibits any of the following symptoms, cleaning should be performed:
- Repairs or upgrades the water tank
- Sedimentation or biological development (e.g., coliform bacteria)
- Changes in water quality that are noticeable
Storage tanks are classified as “confined spaces” by the Occupational Safety and Health Administration (OSHA). As a result, during inspection and maintenance operations, only qualified individuals wearing appropriate protective gear and extraction equipment should enter the structures.
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