Which type of tank is known for having an outer wall that can contain leaks from the inner wall?

Double-walled tanks are designed with an outer wall that serves as a secondary barrier to contain any leaks that may occur from the inner wall. This construction enhances safety and environmental protection by preventing any hazardous materials from escaping into the surrounding environment. The space between the inner and outer walls allows for monitoring any potential leaks, ensuring a proactive approach to maintenance and safety.

Fiberglass tanks, while resistant to corrosion and suitable for various applications, do not inherently feature a secondary containment layer as part of their design. Open vented tanks are primarily used for specific applications requiring air exchange but do not provide any leak containment. Single-walled tanks lack any kind of secondary containment feature, making them less safe in case of a leak, as they do not provide any means of holding the product should the inner wall be compromised.