I’m not familiar with NYC’s requirement. I do know FF’s hate waiting for air to discharge and they get a constant stream of water. Even flat, ostensibly dry hose has a lot of air in it. I mean the lines between the engine and the FDC. Then there’s all the air in the standpipe. Pressurize the dry standpipe and the wait is longer.
You all seen dry spk system trip test. Even after a decent stream there’s a little air spitting. Nozzle reaction from a sprinkler head? Meh. From a 200 gpm solid stream nozzle? Nozzle reaction matters, especially if it’s bouncing around. Keep at 25? I’d suppose amongst concerns is time to bleed line, and start to attack fire. Best. Bruce Verhei > On 10/21/2021 8:30 AM Moschello, Joe via Sprinklerforum > <[email protected]> wrote: > > > It's an FDNY DOB local law amendment NYC made back in 2010 as a result of the > Deutsche Bank fire in 2007 where 2 FF's died and 100 FF's were injured in a 7 > alarm construction site fire. > > Joseph Moschello > Lieutenant/Fire Protection Subcode Official > Summit Fire Department > 396 Broad Street > Summit, NJ 07901 > 908-277-9360 > > > > > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Failla, Daniel via Sprinklerforum > Sent: Thursday, October 21, 2021 10:13 AM > To: [email protected] > Cc: Failla, Daniel > Subject: RE: Supervised Air Manual Dry Standpipe > > CAUTION: This email has originated from outside of the organization. Do not > click links or open attachments unless you recognize the sender and know the > content is safe. > > > > Good morning, > > Can someone please provide the actual NFPA 14, code reference for this > requirement? > > Thank you for the assistance. > > Sincerely, > > Daniel S. Failla Jr. | Deputy Fire Marshal > Charleston Fire Department > Fire Marshal Division > 2 George Street, Suite 3800 | Charleston, SC 29401 > T:(843) 724-5960 | F:(843) 720-5857 | [email protected] | > www.charleston-sc.gov/fire > > > > > > -----Original Message----- > From: Sprinklerforum <[email protected]> On > Behalf Of Henry Fontana via Sprinklerforum > Sent: Wednesday, October 20, 2021 10:47 PM > To: [email protected] > Cc: Henry Fontana <[email protected]>; cw bamford <[email protected]> > Subject: Re: Supervised Air Manual Dry Standpipe > > CAUTION: This email originated outside of the City of Charleston. Do not > click links or open attachments unless you recognize the sender and know the > content is safe. > > > If you want the big east coast city rule. Here it is. > > “ Pressure shall be maintained in the standpipe and cross connections at all > times and shall not exceed 25 psig (172 kPag) by utilizing nitrogen or an air > compressor with an air dryer” > > Henry Fontana > Operations Manager (NYC) > Johnson Controls Fire Protection > 100 Lighting Way| St#402|Secaucus|NJ 07094<x-apple-data-detectors://2/0> > Cell: 201-210-9873<tel:201-210-9873> > [email protected]<mailto:[email protected]> > > > On Oct 20, 2021, at 9:18 PM, cw bamford via Sprinklerforum > <[email protected]> wrote: > > Can somebody on East Coast big city please respond? > > What about using a PS15 Nominal System Pressure 15 psi low pressure > switch on the dry system standpipe? > > On Wed, Oct 20, 2021 at 2:08 PM Mike Morey via Sprinklerforum < > [email protected]> wrote: > > I don’t know that their is an express limit other than minimum 7psi. That > said for safety reasons if you have an air source capable of anything close > to that I’d come up with something to regulate it. Doesn’t 13 limit air > testing to 60 psi for safety? Air pressure is much more dangerous than water > as far as amount of energy stored. > > > Mike Morey > > CFPS 3229 • NICET S.E.T. 123677 > > Project Manager • Fire Protection Group > Shambaugh & Son, LP an EMCOR Company > > 7614 Opportunity Drive • Fort Wayne, IN • 46825 > > direct 260.487.7824 / cell 260.417.0625 / fax 260.487.7991 email > [email protected] > > [Image] > > ________________________________ > From: Sprinklerforum <[email protected]> on > behalf of Matthew J Willis via Sprinklerforum < > [email protected]> > Sent: Wednesday, October 20, 2021 4:51:07 PM > To: [email protected] < > [email protected]> > Cc: Matthew J Willis <[email protected]> > Subject: Supervised Air Manual Dry Standpipe > > > BE ADVISED - This email originated outside EMCOR. > > > > Having an interesting discussion with a senior field man. > > He is concerned that some of the compressors pump to 125 +/-, and was asking > about an AMD. > > I have searched, and also from a hands-on standpoint, do not believe one is > required. > > It certainly is if we introduce a dry valve or deluge into the standpipe > system, but then it gets a different name. > > NFPA 72 only mentions a 10 psi differential for supervisory circuits with air. > > Is an AMD required on this type standpipe? > > R/ > Matt > > Matthew J. 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