Piping design
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How is the allowable pressure drop value for pipes determined in the design manual? Is it experience points? The more detailed the guidance from an expert, the better.
The flow rate is likely an empirical value; the pipe diameter is chosen based on this experience, and the pressure drop is calculated if necessary.
This is related to the flow velocity. (After all, since it involves a velocity squared, the effect of the friction coefficient is minimal.)
It should be experience value; the lower the voltage drop, the better. However, this will increase the pipe diameter. As long as it remains within a reasonable range and does not cause excessive power consumption or affect production, that’s fine
Pipes are part of the process system; this is determined by the process requirements. Similar to the allowable pressure drop of equipment, which also exists within a system and is determined by the process conditions Actual voltage drop (needs to be calculated! ) It must not exceed the allowable voltage drop.
The specific value still depends on the empirical flow rate of the liquid; the pipe is selected based on the liquid flow rate. The pressure drop can be calculated
It ensures that the medium can reach the next device; if the pressure drop is too high, the medium cannot flow to the subsequent device
You can search for this file online. . . Joint Study*... (Diameter Selection and Pipe Pressure Drop Calculation, 2014 Latest Version.doc)
The allowable voltage drop should be an empirical value determined after considering equipment investment and operating costs.
The pipes are small, resulting in high pressure drops and high operating costs; the pipes being too small leads to high flow velocities, which cause erosion, wear, vibration, noise, and static electricity； The pipes are large, resulting in low pressure drops; the investment in pipe materials is high, and too slow flow rates can cause solids-containing fluids to settle ； It is a balanced relationship