What about the changes after steam pressure reduction?
Thread Content
I have a question: if saturated steam at 143 degrees and 0.4 Mpa is supplied from an external pipeline, and after passing through a pressure reducing valve the pressure drops to 0.3 Mpa while the temperature remains largely unchanged, does this mean that the steam has now become superheated steam? I don’t understand, need help!
Yes, without desalinated water for temperature reduction, there will be overheating. But it really depends on the 0.3 value that follows
We should pay attention to the term \"superheat.\" Superheat refers to \"the degree above the saturation temperature under relative pressure,\" right?:)
Saturated steam at 0.4 MPa (143.6°C), after being reduced in pressure by a pressure regulator to 0.4 MPa, has a temperature of 139.4°C. The saturated temperature of saturated steam at 0.3 MPa is 133.5°C; therefore, the superheat after pressure reduction is 5.9°C. To obtain saturated steam after pressure reduction, it is necessary to inject deoxygenated water.
This degree of superheat is advantageous for transportation.