Medium: ammonia; operating pressure: 0.2 MPa; operating temperature: -33 to 159°C. What is the state under these conditions?
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The device parameters received are as shown in the diagram: the ammonia discharge tank has a diameter of DN2000x6000; the medium is 100% NH3; the operating pressure is 0.2 MPa; the operating temperature ranges from -33 to 159°C; the design pressure is 0.5 MPa/FV, and the design temperature is 180°C/-33°C. The diagram indicates a liquid level of half full – is there liquid inside? If there is liquid, shouldn’t it be designed for a pressure of 2.16 MPa, considering ammonia?
Design for the possible ambient temperature!
At 0.2 Mpa, the saturated vapor temperature of ammonia is -19°C; therefore, a liquid phase may exist in the tank during operation
At low temperatures, pressurized ammonia is a liquid
I don’t know what to do with the parameters given by the client