I don’t know how to read the parameters of flow orifice plates; please help
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As the title suggests, other key parameters will also be considered. However, in the operating conditions specified in the \"throttle device data sheet\" provided by the manufacturer, there are the following two parameters: 1) Coefficient of linear expansion of the throttle element (mm/mm°C) = 0.0000175; 2) Coefficient of linear expansion of the pipe (mm/mm°C) = 0.00001338. Are these two parameters useful? When purchasing orifice plates, is it necessary to conduct a review or can it be ignored? How can one verify whether it is correct or not when reviewing? Also, should the other data below simply follow the manufacturer’s calculations? 1. Scale/maximum/normal/minimum Reynolds number (ReD) 2. Opening diameter ratio (B) 3. Opening diameter (mm)_20℃ 4. Discharge coefficient (C) 5. Flow expansion coefficient 6. Uncertainty (+-%) 7. Absolute pipe roughness (k) Thank you~
This post was last edited by Feng Xiao on 2015-10-22 at 08:18. 1) Linear expansion coefficient of the throttle element (mm/mm°C) = 0.0000175 – this is the expansion coefficient of stainless steel at 300–400°C. 2) Linear expansion coefficient of the pipe (mm/mm°C) = 0.00001338 – this is the expansion coefficient of 20 steel (carbon steel) and stainless steel at 300–400°C. The manufacturer will supply you with the orifice plate; you just need to measure its diameter at 20°C to verify that it matches the values listed in the data sheet
The linear expansion coefficient is required in the orifice plate calculation process.