Hello Reza, From what I gather the Fire Department could unhook your hose reel and hook their 1 1/2" hose up and then they would need the 65 PSI. Design to 64 and put a PRV on the inlet of the hose reel where it will be disconnected of the hose reel is unhooked.
Monday, February 25, 2008, 5:51:12 AM, you wrote: > I phoned NFPA & asked the below question from them, they told me in an > occupancy where > you need class II standpipe system, it is not difference if you connect flat > hose or > hard hose reel to 1 1/2 hose connection and as per NFPA-14 residual pressure > should be > 65 psi at the outlet of the hydraulically most remote 11/2 in outlet. > As per my per my experience hose reels need lower pressure to work fine in > comparison > with lay flat hoses. I was checking a fire hose reel manufacture data sheets > and I > noticed that a 1 in. hose reel in 45 psi pressure flow is 21 Gpm with throw > distance of 40 ft. Isn't it enough for a occupant use? Why I am not allowed > to design > based on 45 psi instead of 65 psi in 1 1/2 in outlets while I am using hose > reels? > Thanks, > Reza > Reza Esmaeili <[EMAIL PROTECTED]> wrote: > As I was searching in NFPA codes, I noticed that there are not that > much information about hose reels. Can we use 1 in. semi rigid hose on > hose reels instead of lay flat hoses in occupancies required 1 1/2 hose > stations? Because using a hose reel is much more easier for occupants, Is > there any guide when I can use hose reels instead of lay flat hoses? > What about minimum pressure requirements? As per NFPA-14 residual > pressure should be 65 psi at the outlet of the hydraulically most remote 1 > 1/2 in. hose station, but as per my experience hose reels need lower > pressure to work fine in comparison with lay flat hoses. Do I need 65 > psi pressure even if I use hose reels? > The reason I am asking this question is that in a combined system, as > my standpipe system needs much more pressure than my sprinkler system, > if I can reduce my standpipe required pressure using hose reels I can > save much in selection of smaller fire pump & water tank, but I am not > sure if I am allowed. > I was checking a hose reel manufacture data sheets and I noticed that > a 1 in. hose reel in 45 psi pressure flow is 21 Gpm with throw > distance of 40 ft. Isn't it enough for a occupant use? am I allowed to design > based on 45 psi instead of 65 psi in 1 1/2 in outlets while I am using > hose reels? > Thanks, > Reza > --------------------------------- > Never miss a thing. Make Yahoo your homepage. > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > --------------------------------- > Looking for last minute shopping deals? Find them fast with Yahoo! Search. > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) -- Best regards, Charles Thurston Coastal mailto:[EMAIL PROTECTED] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
