According to N.J.A.C. 12:90 rules, what is the minimum thickness allowed for an atmospheric type blowdown tank?

The correct answer regarding the minimum thickness required for an atmospheric type blowdown tank is 5/16 inch. This specification ensures that the tank is constructed to handle the stresses it may encounter while safely containing fluids at atmospheric pressure.

Regulations such as those in N.J.A.C. 12:90 set these minimum thickness standards to enhance the integrity and longevity of the tanks, which are subject to various operational conditions over time, including corrosion due to the substances they hold and the environmental factors they are exposed to.

While thicker materials can provide additional safety and durability, the code specifically designates 5/16 inch as the minimum thickness, balancing safety with material costs and structural feasibility for these types of tanks.