In a cone roof tank with a floating pan, where does the product withdrawal line terminate?

The termination of the product withdrawal line in a cone roof tank with a floating pan is designed to maximize efficiency and safety in fluid retrieval. By terminating the withdrawal line in a vertical position 6 inches above the top of the sump, the design ensures that the pumping system draws product while avoiding the accumulation of debris, water, or sediment that typically collects in the bottom of the sump.

This specific positioning not only helps maintain the quality of the product by preventing contaminants from entering the withdrawal line but also allows for optimal use of the tank's capacity without compromising the fluid's integrity. Drawing from above the sump height provides a clean product stream and minimizes the risk associated with unwanted materials that could impact fuel or fluid performance and storage.

In contrast, other options may lead to the withdrawal of undesirable materials, inefficiencies, or potential hazards, thus supporting why the chosen option is the best practice for maintaining the quality of the stored product in the tank.