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  1. #1
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    Question Equivalent length for fittings



    Hai,
    How to calculate the equivalent length for the refrigeant piping Elbows



  2. #2
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    Re: Equivalent length for fittings

    .

    Most of the refrigeration text books will have tables showing the approximate resistance of common fittings expressed as an equivalent length of pipe.

    The ASHRAE Handbooks, the ARI Refrigeration and Air Conditioning Handbooks should have them and finally try Japanese manufacturers’ technical data for VRF equipment, as it is a design component in those types of systems.

    As it’s an approximation, you may find variance in the various tables that are available.

    .

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    Re: Equivalent length for fittings

    At college they told us to add 1 metre for each 90.

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    Re: Equivalent length for fittings

    Quote Originally Posted by alexdouglas1969 View Post
    At college they told us to add 1 metre for each 90.
    I guess to minus 1 metre for each 90 added,isn't it?

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    Re: Equivalent length for fittings

    Short turn or long turn, makes a whole difference and it depends also on the size of the lines.
    Last edited by Peter_1; 08-04-2007 at 10:50 AM.
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

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    Re: Equivalent length for fittings

    Oops, do you have/need a copy of this table?
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

  7. #7
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    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: Equivalent length for fittings

    There are some equations out there....

    Here is one source to start with...

    http://www.cheresources.com/eqlength.shtml
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

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    Talking Re: Equivalent length for fittings

    Quote Originally Posted by Peter_1 View Post
    Oops, do you have/need a copy of this table?
    Can u plz post the copy of this table

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    Re: Equivalent length for fittings

    Here you are
    Attached Files Attached Files
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

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    Re: Equivalent length for fittings

    If it is not readable enough, I will rescan it in a higher then75 dpi resolution and post it on an external server.
    This was the max allowable dpi without exceeding 100 kb.
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

  11. #11
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    Talking Re: Equivalent length for fittings

    Thank u for ur post

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    Re: Equivalent length for fittings

    For the best data on fitting pressure drops, get the Crane Technical Paper 410.

    This includes all fittings and many different types of valves.

    Crane even have software that you can use to browse fittings.

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    Re: Equivalent length for fittings

    Here is the link to the Crane software and technical paper.

    http://www.flowoffluids.com/

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