What factor should be considered for tanks operating under pressure according to API 650?

• A. Electrical hazard potential
• B. Potential for structural failure
• C. Exterior color coding
• D. Tank height restrictions

Answer: (B)

When considering tanks that operate under pressure in accordance with API 650, the potential for structural failure is a critical factor. This stems from the fact that internal pressure can create stresses within the tank structure, necessitating a careful evaluation of material strength, design, and construction methods to ensure safety and integrity. If not properly accounted for, internal pressure can lead to buckling, ruptures, or catastrophic failures of the tank, which can have serious safety and environmental consequences.

Evaluating structural integrity involves analyzing the tank's design parameters such as wall thickness, support structures, and the materials used in fabrication. This consideration is essential in maintaining the reliability of the storage system and preventing hazardous incidents.

While the other options may have their own relevance in specific contexts, they do not directly address the concerns associated with pressurized tanks as effectively as the factor of potential structural failure.