Saturation steam related
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This post was last edited by New Century Robot on 2017-10-15 at 16:56. Hello everyone, I have a question I’m not sure about, and I would like to ask for your advice. I hope you’ll be kind enough to help me. Details: 1. Currently, our factory intends to install an orifice plate flow meter after the pipeline coming out of the steam distribution cylinder, in order to display the flow rate and facilitate operations by the operators. 2. The saturated steam pressure in the steam cylinder is approximately 1.0 Mpa at 175 degrees Celsius. After passing through a regular globe valve, the pressure drops to around 0.2–0.3 Mpa, as the opening degree of this valve is not large. What will be the temperature after the globe valve? ? Is it the same as the temperature inside the steam distribution cylinder (around 175 degrees Celsius), or is it 125 degrees Celsius according to the saturated steam pressure table? 3. When purchasing orifice plate flow meters now, we need to take another look at this parameter. I would really like to ask everyone for their advice on this. Thank you. Additional note: The steam source for the cylinder banks is external steam: 2.3 MPa～2.5 MPa ； 240 degrees Celsius, passing through the pressure reducing valve to the steam distribution cylinder. The normal operating pressure for the steam cylinders is 1.5–1.6 MPa. The temperature is uncertain.
Additional note: The steam pressure source for the cylinder banks is as follows: External steam: 2.3–2.5 Mpa； 240 degrees Celsius.
What is the temperature of the cylinder sections, and what is the temperature behind the valve?
Select the orifice plate design temperature at 240 degrees Celsius.
In the circulating state, the temperature after pressure reduction using a regular stop valve remains around 175°C, with little change in the steam temperature. If the saturation steam pressure and temperature after the temperature and pressure reducer can be referenced against the saturation vapor pressure. Even after being depressurized by a regular stop valve, the steam remains superheated; its temperature does not decrease.
I don’t have a thermometer here, so I don’t have any specific data; that’s why I had this question. It’s now been answered, thank you