If an underground steel tank is repaired by interior lining, what does API recommend for all other steel tanks at the same facility?

The recommendation by the American Petroleum Institute (API) for other steel tanks at the same facility after one has been repaired by interior lining is to also line those tanks. This approach is driven by the need for consistency in operation and the prevention of future corrosion or leaks. When one tank shows signs of deterioration that warrant repair, it suggests that the environment it operates in could be detrimental to the integrity of the other steel tanks as well.

Applying an interior lining to all steel tanks helps ensure that they have the same level of protection against corrosion, which is a common concern with underground storage tanks. It also helps to extend the lifespan of the existing tanks and maintains regulatory compliance, reducing the risk of environmental contamination from leaks. Choosing to line all tanks creates a more uniform operational standard within the facility, thereby maintaining operational integrity and safety.