What is the maximum threaded pipe diameter permitted in an ammonia system?

The maximum threaded pipe diameter permitted in an ammonia system is 2 inches. This regulation is primarily dictated by safety and efficiency considerations, as ammonia is a toxic and corrosive refrigerant. Threaded connections can introduce potential leak points, and larger diameters increase the risk of such complications. Therefore, limitations are set on the size of threaded connections to minimize risks while maintaining effective operation within the system.

Choosing a diameter greater than 2 inches would not only complicate the installation and maintenance processes but also elevate risks associated with leaks and potential failures in high-pressure systems. Thus, the 2-inch limit reflects a balance between the practical need for pipe diameter and adherence to safety protocols in handling ammonia systems.