Which types of tanks are covered under API 650?

• A. Underground storage tanks
• B. Welded tanks for chemical storage
• C. Aboveground storage tanks for petroleum liquids
• D. Tanks for drinking water storage

Answer: (C)

API 650 specifically addresses the design and construction of aboveground storage tanks for petroleum liquids. This standard provides guidelines that ensure the safety, integrity, and quality of tanks used for storing various types of petroleum products and related liquids. It includes provisions for materials, design, fabrication, inspection, and testing, all tailored to the specific needs of aboveground storage tanks.

The choice that focuses on this type of tank is appropriate because API 650 is intended to mitigate risks associated with the storage of petroleum, which can include environmental hazards, leaks, and structural failures. In contrast, the other options pertain to different types of storage systems. Underground storage tanks and tanks designed for other substances, like chemicals or potable water, fall outside the scope of API 650, which is solely dedicated to aboveground tanks related to petroleum applications. This distinction is crucial for ensuring compliance with appropriate standards for diverse storage requirements.