Do you need to allow for corrosion allowance in bolted tank design?

For the vast majority of storage applications, applying a corrosion allowance is not necessary for factory coated bolted steel tanks. Typically corrosion allowance is required in field welded and field coated tanks where the underside of the steel tank floor is uncoated and can allow corrosion to occur.

Bolted tank components are coated in a factory using automated paint lines coated on all sides. Thus, there is no need to apply additional corrosion allowance when selecting the plate thicknesses.