Oil storage tanks are predominantly cylindrical due to superior structural integrity, cost-effectiveness, and ease of maintenance. This shape efficiently distributes pressure and minimizes weak points, making them the industry standard for storing large volumes of crude oil.

• The cylindrical design eliminates corners, which are weak points in square or rectangular tanks, ensuring even pressure distribution.
• Cylindrical tanks are more cost-effective due to a higher volume-to-surface-area ratio, requiring less material for the same storage capacity.
• The shape enhances cleaning and maintenance by preventing sludge accumulation in corners and improves stability in mobile applications like fuel tankers.