What size piping is used to connect the pressure reliefs and other drains to the product recovery tank in a Type III system?

In a Type III fuel system, the correct size piping used to connect the pressure reliefs and other drains to the product recovery tank is 2 inches. This larger diameter is essential to ensure that any potential overflow from pressure relief valves and drains can be effectively and safely transported to the recovery tank without causing back pressure or restrictions.

Implementing a 2-inch piping system allows for adequate flow rates, minimizing the risk of blockages and spillages that could lead to environmental hazards or system failures. Additionally, the sizing is designed to accommodate variations in flow that could occur during operation, ensuring that the system remains functioning within safe parameters.

Other sizes, such as 1/2 inch, 1 inch, or 1-1/2 inch, may not provide the necessary capacity for the safe drainage and recovery of fluids, leading to potential operational issues. Thus, the use of 2-inch piping is a standardized practice in Type III systems to maintain safety and efficiency in the management of fuel from pressure reliefs and drains.