One thought to your point - A 20 foot hard pipe drop has the advantage of also dropping 20 feet. You will gain a substantial amount of pressure from the elevation change that should more than overcome the flow demand of a light hazard pipe schedule standard coverage pendant.
A 20 foot equivalent drop does not have the same hydraulic advantage. It seems like you should be able to use flex drops on a pipe schedule system. The ones that I have surveyed and calculated always come up with plenty of safety. That does not mean I would be ok making substantial changes to the hydraulics without a close examination at a minimum. Matt -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of J H via Sprinklerforum Sent: Monday, August 02, 2021 5:07 PM To: [email protected] Cc: J H <[email protected]> Subject: Re: Flexible hose head connectors on a pipe schedule system I'll be devil's advocate. Pipe scheduled systems don't have limits on drop lengths and I've seen a few scheduled warehouse systems with 30 to 40 ft. roof decks with sections of office spacing below at 10 ft. with pendents feeding them. So if you can do it per the pipe scheduled method you should be able to do it with a shorter 6 ft. flex hose with the same equivalent feet that you might find in a hard piped system. JH On Mon, Aug 2, 2021 at 11:07 AM Sean Lockyer via Sprinklerforum < [email protected]> wrote: > Can flexible hose head connectors (I.E. - "Flexheads") be used on a > pipe scheduled system ? Since calculations were not performed due to > it being a scheduled system, the friction loss would be superfluous, > correct ? Any help would be greatly appreciated. > > Thanks > Sean Lockyer > AIT Life Safety > > > > > > > > > > > > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > https://linkprotect.cudasvc.com/url?a=http%3a%2f%2flists.firesprinkler > .org%2flistinfo.cgi%2fsprinklerforum-firesprinkler.org&c=E,1,yJy0FkmWv > 8kAJnTMsneav8pMYCXQyB51SLZNS6LoNvcWkygfvZGinfj8b8hSd1vKMMaxWK8DPJRtJW1 > RinlHD5v5CnYW6HpqRbi2sK9qGsnk8r1tgA,,&typo=1 > _______________________________________________ Sprinklerforum mailing list [email protected] https://linkprotect.cudasvc.com/url?a=http%3a%2f%2flists.firesprinkler.org%2flistinfo.cgi%2fsprinklerforum-firesprinkler.org&c=E,1,qqPjQ536SLPWlZ6fljifsKteUsfO-D3vceU1ulLIpavUOfR6x8WCalfKvRdFsgup6SEESABKWeFtBmXyhbjWSbAsnn0BdIMROrZQszUa3x0G5kcfQEhYLKe6Nw,,&typo=1 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
