Requirements for centrifugal pump outlet piping
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It is a single-stage centrifugal pump used for transporting sewage; the inlet pipe has a diameter of DN100, and the pump model is 100-65-250. Can a DN80 pipe be used for the outlet?
The inlet pipe has a diameter of DN100; the pump model is 100-65-250, and the outlet can be connected to a pipe with a diameter of DN80
The inlet pipe and outlet pipe are generally sized one size larger. If the pipeline is long, has many bends, and high valve resistance, scale it up further based on the calculation results.
The size of the pipe can be calculated based on the flow velocity; generally, the flow velocity of wastewater at the pump outlet is around 2–3 m/s. The appropriate pipe diameter is selected based on the flow rate and flow velocity. Based on design experience, the diameter of general inlet and outlet pipes should be one size larger than that of the pump’s inlet. But it’s best to calculate it yourself. I want to send a hydraulic calculation software, but I can’t upload attachments; if you need it, I can send it to you separately.
It’s fine to have an inlet pipe of DN100 with an outlet pipe of DN80.
It is common sense that the inlet pipe needs to be larger than the outlet pipe
Is the pump outlet flange DN65? Should a reduction fitting of 65/80 be installed at the outlet?
A 65/80 reduction is needed at the pump outlet
Without adjusting the sizes, how can you connect them?
The DN80 pipeline is a bit of a waste. Unless the pipeline is very long.
Absolutely, with an outlet plus reducer, jumper, pressure gauge, check valve, valve, and outlet pipe.