Currently NFPA 14-2019 only requires manual dry systems to be monitored with supervisory air in accordance with NFPA 72.
6.1.1 Location of Dry Standpipes. > Dry standpipes shall be monitored in accordance with NFPA 72 with > supervisory air pressure. This is an ambiguous requirement and does not provide prescriptive pressures. Additionally, some have made the argument that this only requires compliance with NFPA 72 *IF* supervisory signal initiating devices are installed. It should be noted that NFPA 72 does not require the installation of these devices, just how they interface with the alarm system, so the installation requirement has to come from NFPA 14. That being said, the committee is currently working on language for the 2022 edition to clarify this requirement. This is the current language that can be found in the first draft of the 2022 edition (see nfpa.org/14next to look at it in TerraView) 8.3.2.4 Supervisory Air. > 8.3.2.4.1 System piping shall be supervised. > 8.3.2.4.2 Supervisory air shall be maintained at a minimum pressure of 7 > psi (0.5 bar). > 8.3.2.4.2.1 Supervisory air pressures shall be permitted to be less than 7 > psi (0.5 bar) in accordance with the manufacturer's instructions. > 8.3.2.4.3 Supervisory air shall be maintained at a maximum pressure of 20 > psi (1.4 bar). > 8.3.2.4.3.1 Supervisory air for automatic dry and semiautomatic dry > systems shall be permitted to exceed 20 psi (1.4 bar) in accordance with > the manufacturer’s instructions for dry pipe and deluge valves. This would apply to all dry standpipe systems (automatic, semi-automatic, and manual). I would encourage everyone to review the change and submit a public comment if you feel there needs to be further clarification. Additionally, the entire document was restructured and several new requirements pertaining to vertical standpipe system zones were added, so again -- review and submit public comments. The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the NFPA or its technical committees. AFSA cannot provide design or consulting engineering services, and this opinion should therefore not be considered, nor relied upon, as such. Kevin Hall, M. Eng, P.E., ET, CWBSP, PMSFPE Coordinator, Engineering and Technical Services American Fire Sprinkler Association [email protected] 214-349-5971 On Thu, Oct 21, 2021 at 10:13 AM Failla, Daniel via Sprinklerforum < [email protected]> wrote: > 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. Willis > Design Manager / Code Compliance > 1530 Samco Road, Rapid City, SD 57702 > Office-605.348.2342 /Direct-605.593.5063/Cell-605.391.2733 > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > > https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.com%2Fv3%2F__http%3A%2F%2Flists.firesprinkler.org%2Flistinfo.cgi%2Fsprinklerforum-firesprinkler.org__%3B!!FaxH778!Me68QOsN00ZJIIRC_8sOvWRaXf3Z8J8WpecLIJ7HV906Frsxib_TWTneXSPMdVXX%24&data=04%7C01%7CHenry.Fontana%40jci.com%7Cda4d2db18f414ad7ae8808d99430a759%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C637703758955943749%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=YMgUEsRs3z6IWEbhy7PLTDdeI5CvunD3si1Le6lKTpI%3D&reserved=0 > > This message is for the named person's use only. It may contain > confidential, proprietary or legally privileged information. 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