What is the best method for applying foam on top of storage tanks?

The best method for applying foam on top of storage tanks is Bantings. This technique involves the use of a special nozzle or application method that helps enhance foam coverage and effectiveness when applying it to large surface areas like tanks.

Using Bantings allows for a more controlled foam application, ensuring that the foam blankets the surface efficiently, which is crucial for fire suppression and preventing reignition. The method helps in breaking the surface tension of the liquid and allows the foam to spread evenly across the surface for optimal performance.

In contrast, other methods might not achieve the same level of effectiveness in addressing the unique challenges posed by storage tank fires. Techniques such as direct spraying or fogging can lead to the foam being blown away or evaporated before it can provide adequate coverage. Conversely, sub-surface injection might be more appropriate in different scenarios, such as dealing with ignitable liquids below the surface, but it is not the preferred method for applications involving open storage tanks. This highlights why Bantings is considered the best choice for foam application in this particular context.