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Repairs & Upgrades
It is often more economical to repair rather than replace a tank that either does not meet current seismic requirements or is suffering the effects of age. The extent of repairs depends upon how well the existing coating has performed and how well the tank was maintained. Repairs can range from a standard blast and re-coating, to more extensive work such as foundation work, rafter replacement, center column repair, bottom or roof replacement, reinforcement of shell plates, installing new tank nozzles with flexible connections, updating ladders to meet OSHA requirements, or adding cathodic protection. We always provide disinfection services so the tank is ready to go immediately back into service when our work is complete.
It is often more economical to repair rather than replace a tank that either does not meet current seismic requirements or is suffering the effects of age. The extent of repairs depends upon how well the existing coating has performed and how well the tan
Performing repairs offers an excellent opportunity to bring an existing tank up to current seismic designs. This can include modifications of the tank anchorage system, foundation design, rafter bracing, shell nozzle connection, and pipe flexibility.
Tank anchorage requirements have evolved with various updates in AWWA D100. Many older tanks have inadequate foundations, which has been a cause of numerous tank failures. The rocking of a tank in a seismic event causes the bottom shell to bulge...
It is common to add additional rafter braces or "rafter ties" to existing tanks to keep the rafters from rolling in a seismic event.
In a seismically active area, it is advisable to install flexible connections that allow movement between the tank nozzle and the underground piping. There are several ways this can be achieved, depending on the seismic requirements in your area...
If calculations determine that the tank shell is insufficient for your project or does not meet current AWWA seismic requirements, it can be stiffened in several ways. Processes include installing bolted-on steel bands ranging from a couple of inches...
If there is an immediate need for any tank repair please call us at our office 805-343-7437 or via e-mail 24 hrs a day at wade@crosnoconstruction.com. We will dispatch a welding crew with portable welding equipment to perform all necessary repairs...
A well-applied tank coating is critical in maximizing the longevity of a tank. Crosno Construction's highly skilled and experienced painting staff self-performs all of our new tank coatings and can also perform existing tank recoating work per AWWA...
Many existing tanks that do not meet the current OSHA requirements can easily be upgraded to current standards. Common additions include larger and additional manways, new handrail systems, new caged ladders, ladders with rest platforms...
We provide disinfection services for all of our new tanks and for re-paints of existing tanks per AWWA C652 Method 2. We can also provide routine tank cleaning and disinfection.