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inlet pipe size

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by steviep, Oct 3, 2008.

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  1. steviep

    steviep Member

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    Aug 13, 2008
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    Loc:
    southeast NH
    The wood boiler I had given to me has 2 - .75 pipe inlets . what is 2 - 3/4 pipes equal to in single piping. I know that 3/4 + 3/4 doesn't always equal 1.5. I think the output is 1.25.

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  2. Duetech

    Duetech Minister of Fire

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    1.25' is close enough...Cave2k
  3. kabbott

    kabbott Member

    Joined:
    Nov 19, 2007
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    Loc:
    Hampstead,Maryland
    Diameter x Pi = circumference

    Radius squared x Pi =area.... .75 diameter= .375 radius (.375x.375)x3.14=.44 x 2 pipes=.88 sq inches.
    1 inch pipe (.5x.5)x3.14=.785 sq inches
    1.25 inch pipe (.625x.625)x3.14=1.22 sq inches

    In reality reducing for a short section right at the boiler will have little effect(within reason).
  4. Duetech

    Duetech Minister of Fire

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    Oops! Wrong formula. Sorry about that. I was thinking surface area and not internal area.
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