Which type of tank is not intended for fixed installation?

The designation of a tank as "portable" indicates that it is designed for easy movement rather than intended for a permanent or fixed installation. Portable tanks are typically used for temporary storage and can be relocated as needed. This flexibility makes them suitable for situations where the contents may need to be transported or have variable application locations.

In contrast, other types of tanks, such as atmospheric, primary, and temporary tanks, are typically associated with more permanent or specific usage scenarios. Atmospheric tanks, for example, are designed for fixed installations because they are built to store liquids at atmospheric pressure and are often used in conjunction with established infrastructure. Primary tanks are usually part of a permanent setup designed for long-term storage of materials. Temporary tanks, while they may not represent a long-term solution, are still organized for a specific period of use and may be more stable for fixed positioning compared to portable tanks.

Understanding these definitions helps clarify why portable tanks are not intended for a fixed installation, focusing on their intended mobility and adaptability.