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Thread: How does pressure change in a pipeline if, it

  1. #1
    Associate Engineer
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    How does pressure change in a pipeline if, it



    What happens to the pressure when you have one pipeline with 1 bar pressure that ties to a common head wither another pipeline with 7 bar pressure. Does that 7 bar fluid stop the 1 bar fluid going in?
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  2. #2
    Administrator Kelly Bramble's Avatar
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    Depending on the design of the system, check valves or not the 7 Bar source will be the pressure minus pressure loss from flow.
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

  3. #3
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    Y-Spring Check Valve, or Swing Check Valve

  4. #4
    Technical Fellow jboggs's Avatar
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    Two adjoining pipes with no valve in between cannot have different pressures. The 7 bar pressure will fill the volume all the way back to the valve in your diagram. If it is a check valve holding back the 7 bar pressure, it will only open when the pressure on the other side exceeds 7 bar. There is no way to feed fluid under 1 bar pressure into a volume at 7 bar pressure. I am ignoring pressure losses due to flow.

  5. #5
    Associate Engineer
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    It's possible the pipe is obstructed inside. Perhaps rust scale, large glob of pipe dope, etc.. That would impede pressure balance I think. Just a thought.

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