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://urldefense.com/v3/__http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org__;!!FaxH778!Me68QOsN00ZJIIRC_8sOvWRaXf3Z8J8WpecLIJ7HV906Frsxib_TWTneXSPMdVXX$ This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
