Regarding the design value of the flow velocity of the medium in the pipeline.
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When transporting fluid media through pipes, and when the fluids are gases or liquids respectively, what is the typical design flow velocity within the pipes? What do the relevant standards specify, and based on experience, how is this value determined? For example, in the China-Myanmar oil and gas pipeline project, 12 billion cubic meters of natural gas are transported per year. If the diameter of the pipeline is DN1000 and the pressure is 5 MPa, the flow velocity is approximately 9 m/s. Is this flow velocity reasonable?
Under normal circumstances, it is 1–3 m/s for liquids, and 0.5 m/s for liquids with high viscosity. Gas flow rate: 10~30 m/s.
The maximum flow velocity of the liquid should preferably not exceed 6 m/s