Beyond critical temperature, what other factor is crucial for ammonia (NH3) safety?

In the context of ammonia (NH3) safety, pressure levels are indeed a crucial factor beyond the critical temperature. Ammonia behaves differently under varying pressure conditions, which can significantly impact its properties, such as its boiling point and volatility.

When the pressure is increased, ammonia can exist as a liquid at higher temperatures, which affects how it is handled and stored. If the system pressure exceeds the design specifications due to a failure of pressure relief mechanisms or equipment malfunction, it can lead to emergencies such as leaks or ruptures, resulting in hazardous situations.

Thus, understanding and managing pressure levels is essential for ensuring the safe operation of systems involving ammonia, as it helps prevent accidents potentially caused by over-pressurization or inadequate system design under high-pressure conditions.