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Pipe Flow
Last Post 01 Sep 2013 07:55 PM by Kanfoosh. 0 Replies.
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Kanfoosh
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01 Sep 2013 07:55 PM
    Hi,

    I have calculated pressure loss across a reduction and would appreciate someone to proof read my calcs:

    I have a pipe flow of 70m3/hr in a DN100 Pipe and need to install a device inline which is a DN50.

    Using the formula under heading Permanent pressure drop for incompressible fluids in the link below, assuming Cd=1, I got a result of P1-P2=45969.79

    http://en.wikipedia.org/wiki/Orific...an_orifice

    I redone the calculation using P1-P2=1/2.Rho. V2 and got a result P1-P2=49028.32

    The results being more than 45 meters head loss across the reduction seems excessive. Can you please pass comments

    Thanks
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