What is the minimum diameter of the main line for a NH3 branch lateral?

The minimum diameter of the main line for a NH3 (ammonia) branch lateral is indeed 4 inches. This specification is crucial for ensuring safe and efficient transport of ammonia, which is a hazardous substance commonly used in agricultural and industrial applications.

A diameter of 4 inches is necessary to accommodate the flow requirements and pressure considerations associated with ammonia transport. Adequate diameter helps in minimizing the risk of clogging and ensures that the system can handle the pressure without risk of leaks or ruptures. It's important to maintain these standards to comply with safety regulations and to ensure that the system operates effectively without undue stress or risk of failure.

Observing the necessary diameter is integral not only for operational efficiency but also for the safety of personnel and the environment, given ammonia's toxicity and reactivity. Proper sizing is a key component of responsible ammonia handling practice and engineering design.