Is DN500 big enough?
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Could everyone please help check this: the inner diameter of my pipeline is DN500, the density of the liquid is 1.2 g/l, the height difference is 1 meter, there are 6 elbows, the length of the pipeline is 100 meters, and one butterfly valve is in the fully open position. Can the flow rate of this liquid reach 600 cubic meters per hour?
Flow rate = flow velocity × cross-sectional area of the flow channel. Based on the parameters you provided, the flow velocity is approximately 0.85 m/s. Generally, the flow velocity for liquids ranges from 0.5 to 3 m/s; therefore, a pipe with an inner diameter of 500 meets the requirements. The pipeline is relatively short, so economic analysis is not necessary.
Given the conditions specified by the poster – a height difference of only 1 meter, 6 elbows, and 100 meters of pipe – it might be a bit tight. What about the viscosity? If the viscosity isn’t very high, it should be sufficient; if the viscosity is high, it’s hard to say!
The term \"inner diameter DN500 for the pipeline\" is problematic; what does a head difference of 1 meter mean?
It should be possible; with a height difference of 1 meter, the pressure difference based on water calculations would be around 10 KPa. For a pipe with an inner diameter of DN500 and a length of 100 meters, the pressure drop is between 4 and 5 KPa.
“The inner diameter of my pipe is DN500, the density of the liquid is 1.2 g/l, the height difference is 1 meter, there are 6 elbows, the length of the pipe is 100 meters, and the flow rate is 600 cubic meters per hour. Based on LZ’s specifications, the slope of the pipe is 1/100, meaning flow occurs almost by gravity alone. With a liquid density of 1.2 g/l (it’s likely that the medium has high viscosity or contains solids), the appropriate flow velocity should be between 0.3 and 0.5 m/s; therefore, I believe that an inner diameter of DN500 might be too small. For reference.
The DN500 pipe can’t be a \"steel-reinforced plastic composite pipe\", right? It seems that this term is only used for pipes like ours. The inner diameter is DN500, isn’t that right, OP?
It seems a bit small; DN800 is about right
We have DN500 ammonia pipelines here, as well as circulation ammonia pipelines for coke ovens. The pump outlet pressure is 0.40 MPa; there are approximately 8 DN500 elbows in the pipeline, with a total length of around 200 m. The location where ammonia is used is 15 m higher than the pump outlet, and the pump’s flow rate is 1000 cubic meters per hour. I hope this can help you.
Thank you all for your help. The pipeline is made of fiberglass-reinforced plastic, and the viscosity of the saline medium is 0.924 CP.