What type of ammonia system requires a testing pressure of 250 psi?

The testing pressure of 250 psi is a standard requirement for both water cooled and evaporative ammonia systems. This testing pressure is essential to ensure the integrity and safety of the system. It allows for the detection of leaks and verifies that the system can handle the operational and potential pressure fluctuations that may occur during regular operation.

Water cooled systems utilize water as a cooling medium, while evaporative systems typically involve the evaporation of water to facilitate cooling. Both types of systems must withstand similar pressures due to their design and operational characteristics. The requirement for a consistent testing pressure ensures that both types meet safety and operational standards necessary for high-pressure ammonia systems.

Air cooled systems, on the other hand, may have different testing standards due to their different cooling methods and design specifications. This makes them a distinct category that does not share the same testing pressure requirement as the other two systems.