What is the appropriate schedule for NH3 pipe diameter between 2" and 10"?

The appropriate schedule for ammonia (NH3) piping, particularly for diameters ranging between 2 inches and 10 inches, is typically Schedule 40. This specification is commonly used due to its balance between strength and weight, making it suitable for handling the pressures often encountered in ammonia systems.

Schedule 40 pipe provides adequate wall thickness to support the pressure without being overly heavy or cumbersome, which is essential in maintaining ease of installation and reducing stress on brackets or supports. The scheduling system denotes the thickness of the pipe walls, with higher schedule numbers indicating thicker walls. In the case of ammonia, which can be corrosive, Schedule 40 also provides sufficient durability while accommodating the necessary safety margins.

In contrast, other schedules could either be too thin, not providing enough structural integrity for the pressure conditions expected in ammonia applications, or too thick, which could unnecessarily increase costs and weight. Therefore, Schedule 40 is the standard choice for such setups, ensuring safety and reliability within the system's operational parameters.