What are the pipe diameters before and after the steam pressure relief valve?
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May I ask what considerations are there regarding the pipe diameters of the pipes before and after the steam pressure reducing valve? Does the pipe diameter decrease or increase after pressure reduction? Why?
The pipe diameter increases after pressure reduction; it is best to determine it based on flow rate, pressure, temperature, and allowable pressure drop.
The pipe diameter generally increases after depressurization, though the specific situation can vary sometimes.
Could you explain why it gets bigger?
After pressure reduction, the specific volume of steam increases and its volume expands; the pipe diameter is calculated using standard cutoff velocity tables