1. #1
    MembersZone Subscriber

    Join Date
    Nov 2008
    Location
    Wisconsin
    Posts
    35

    Default Calculating Aerial Discharge

    We have a 100ft platform aerial with a 1500 gpm pump and a 4" steel pre plumbed water way. The aerial master stream can either be a 350-1000gpm selectable gallonage fog nozzle. Or stacked smoothbore tips. I was wondering what to use a coefficient for the steel, and if anyone had any examples of a pressure chart for aerials. Any help is appreciated. Thanks

  2. #2
    MembersZone Subscriber

    Join Date
    Dec 2002
    Location
    Central NJ
    Posts
    1,214

    Default

    Use a pitot tube and/or inline gauges take real flow test readings at various flows.

  3. #3
    Forum Member

    Join Date
    Jul 2001
    Posts
    145

    Default

    You can't calculate it with any degree of accuracy. No two aerials are
    identical. You will need to use a flow meter and record the flows at different
    extensions,elevations, pressures and with the different nozzles.

    Cheers,

    Don
    Last edited by don120; 07-10-2009 at 08:46 AM.

  4. #4
    MembersZone Subscriber

    Join Date
    Jan 2007
    Location
    Pa Wilds
    Posts
    582

    Default

    fordrules: Check this thread. http://forums.firehouse.com/showthread.php?t=104214

    Kuh

  5. #5
    MembersZone Subscriber

    Join Date
    Nov 2008
    Location
    Wisconsin
    Posts
    35

    Default

    KuhShise thanks for the link. Where is a good place to get a pitot gauge from?

  6. #6
    MembersZone Subscriber

    Join Date
    Jan 2007
    Location
    Pa Wilds
    Posts
    582

    Default Net search (quick)

    fordrules:
    Found these on the net. Also tried Darley, but they didn't have a hand held.

    A machinist in our FD made ours from stainless and then just attached a liquid filled gauge. Testing fire pumps is not much of a problem for a standard gauge, but if you need to test some new hydrant installations (poor contractor practices) you should expect to have a certain amount of debris (rocks, snuff box lids, pop cans etc. come flying out the hydrant butt when you first run the tests. Water co's will tell you that they are not in the business of supplying FF water, so they never run full flows until the FD does the testing.

    AKRON BRASS PITOT GAUGE WITH CASE, 0-160 PSI
    $264.99
    Item# HH26C

    http://www.chiefsupply.com/Fire,Resc...quipment/HH26C


    Pitot Tube.
    NEM-006 New round handle, chrome plated brass with quick disconnect (m&f) and choice of molded step or plain blade, no gauge $ 94.95

    http://firesafetytech.com/water-flow...equipment.html


    Pollardwater.com
    200 Atlantic Avenue, New Hyde Park, New York 11040
    Pitot Gauge with Case, 160 PSI $104.95


    http://www.pollardwater.com/pages_product/P674pitot.asp

  7. #7
    MembersZone Subscriber
    ffmedcbk1's Avatar
    Join Date
    Aug 2003
    Location
    Ohio
    Posts
    781

    Default

    almost every department has an in-line gauge or a pitot, call a neighboring department, any fire equipment vendor sells them.

    make sure the gauges are calibrated frequently to oem specs.
    Originally Posted by madden01
    "and everyone is encouraged to use Plain, Spelled Out English. I thought this was covered in NIMS training."

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Hydraulically Calculating Sprinkler Systems Piping?
    By FireScholar22 in forum Firefighters Forum
    Replies: 1
    Last Post: 04-27-2005, 08:14 AM
  2. Calculating PDP for Preconnects
    By MG3610 in forum Firefighters Forum
    Replies: 15
    Last Post: 03-14-2005, 02:54 PM
  3. 2.5 inch discharge
    By Eng47ine in forum The Engineer
    Replies: 11
    Last Post: 06-02-2004, 09:59 AM
  4. Military Discharge
    By CaptBob in forum Hiring & Employment Discussion
    Replies: 0
    Last Post: 06-08-2003, 01:35 PM
  5. Five inch discharge
    By DD in forum The Engineer
    Replies: 8
    Last Post: 06-20-1999, 09:35 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Log in

Click here to log in or register