How should the design pressure for micro-negative pressure pipelines be determined?
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Ladies and gentlemen, there is a micro-negative pressure pipeline that is connected to the exhaust fan (at -5 kPa), and on the other end it is connected to the reaction vessel (under normal operation, at atmospheric pressure). What should be the design pressure for this micro-negative pressure pipeline? Should it be designed at -0.1 MPa for vacuum pipelines, or at normal pressure for standard pipelines? What value should be used for the design pressure?
This might be a better area for communication regarding processes; I can help you move there
Full vacuum design needs to be considered for vacuum tubes
Even with the induced draft fan connected and the negative pressure being very low, should it still be designed at a pressure of -0.1 Mpa as per the design specifications?
Yes, pipes are designed this way, so it basically has no impact
This seems to provide a higher degree of safety; I think, in theory, it’s not necessary to maintain full negative pressure.
There’s no need to be that precise; and as long as it’s a metal pipe, the wall thickness for pipes designed for full negative pressure is generally the same as that for pipes designed for normal pressure. If you’re using a non-metallic pipe, then careful calculation will be required
-0.1Mpa see 20570