What is the acceptable amount of deflection in a newly-installed tank determined by?

The acceptable amount of deflection in a newly-installed tank is determined primarily by the manufacturer's limits. Manufacturers provide specific guidelines and specifications that detail the acceptable levels of deflection to ensure the tank's structural integrity and safe operation. These limits are based on the design and materials used in the tank's construction, reflecting the manufacturer's understanding of the tank's capabilities and performance under various conditions.

Both industry standards and regulatory requirements may influence best practices, but they typically do not set specific deflection limits as precisely as manufacturers do. Visual inspection alone, while important for assessing the tank's condition, is not a definitive measure of acceptable deflection. Thus, referring to the manufacturer's limits ensures compliance with the necessary safety and operational criteria specifically tailored for that tank.