If you do it don't you end up with a tank and pump for every building? When I was in Oklahoma a couple years ago there was a big sign at the hotel telling us you may not have water in your room due to the drought and low later pressure. That tells me the sprinklers didn't have water either. I've seen in Atlanta where you do the test and then monitor the static for 24 hours and slide your test down to that static pressure. Some cities in these parts have a minimum safety based on knowing the fluctuations they experience. So city X is 5 psi but city Y is 15 psi. Few flaws in both methodologies but it's something anyway.
Chris Cahill, PE* Associate Fire Protection Engineer Burns & McDonnell Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com *Registered in: MN Proud to be #14 on FORTUNE's 2014 List of 100 Best Companies to Work For -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Friday, June 20, 2014 1:55 PM To: [email protected] Subject: RE: to Pitot or not to Pitot? It may well be a requirement, but back to my rhetorical question: who's actually doing it? SL -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Mark A. Sornsin, P.E. Sent: Friday, June 20, 2014 11:39 AM To: [email protected] Subject: RE: to Pitot or not to Pitot? Oh, and BTW, taking those seasonal/local/whatever fluctuations into account IS noted in NFPA 13 - so one could argue correctly that it is a requirement of "code" (assuming your code references NFPA 13). Mark A. Sornsin, P.E. | Karges-Faulconbridge, Inc. | Fire Protection Engineer | Fargo, ND | direct: 701.552.9905 | mobile: 701.371.5759 | http://www.kfiengineers.com -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Friday, June 20, 2014 12:57 PM To: [email protected] Subject: RE: to Pitot or not to Pitot? How many people, when requesting or performing a flow test or flow model, specify that the values be measured at peak seasonal and peak day demands? How much fluctuation does a given water system or zone experience in a day/week/month/year? How many of us review those fluctuations and factor them into a flow test once it's taken? ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler .org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
