Debottoming the source tank is done to prevent what?

• A. Prevent electrostatic buildup
• B. Reduce pressure
• C. Improve flow
• D. Increase API

Answer: (A)

Static electricity can build up when liquids move and mix during transfer, creating a spark risk in flammable cargoes. The bottom layer of a source tank often contains free water and sludge; drawing from that layer introduces interfaces and contaminants that increase charge generation in the flow. Debottoming removes that bottom layer, making the cargo stream more uniform and reducing the opportunities for electrostatic charges to accumulate. This helps minimize the chance of a static discharge during transfer. It’s not about lowering pressure, speeding flow, or changing API, but about reducing static-related safety risk.