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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