Which aspect is crucial in the design of tanks under API 650?

• A. Cost-benefit analysis
• B. Weather resistance
• C. Structural integrity
• D. Visual aesthetics

Answer: (C)

In the design of tanks under API 650, structural integrity is a paramount aspect because it ensures the tank can withstand the various physical forces and stresses it will encounter during operation. This includes the weight of the liquid stored, environmental loads such as wind and seismic activity, and the effects of material fatigue over time. Structural integrity is essential for the tank's overall safety, preventing failures such as leaks or catastrophic collapses, which could lead to environmental hazards or loss of valuable products.

The design principles outlined by API 650 focus on creating tanks that are not only capable of holding oil or other liquids securely but also maintain their shape and durability under pressure and external conditions. Therefore, considerations like proper material selection, design calculations for wall thickness, and reinforcement where necessary are fundamental to achieving structural integrity. Without this focus, the tank could face severe operational risks, which is why this aspect is prioritized in the design process.