I just re-read your original question. If I read it correctly, you indicate that your demand point is below the curve, but the flow measured during the test was less than the demand flow of your system.
As long as you are below the curve you are fine. The amount of flow at the time of the test is irrelevant, it simply provides a point on your curve. Paul J. Pinigis, P.E. Chief Life Safety Engineer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Burtell Sent: Wednesday, July 30, 2008 1:22 PM To: [email protected] Subject: RE: Water Supply I have tried a new flow test with two 2-1/2" openings flowing and the pressure dropped off so that didn't work. I checked the coefficient and it is a .9. The hydrant does have a rounded inlet. I don't have play pipes and either does the city which is the only one that can do the test. I have tried different heads and pipes and nothing will drop my GPM to below the 31 gpm we are short. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chris Cahill Sent: Wednesday, July 30, 2008 11:08 AM To: [email protected] Subject: RE: Water Supply That was my first thought too. Joe's been around and must have already done this. Maybe he's having a bad day or there is more to the story. To answer Joe's question plainly, no. The but is I never meet an AHJ that wouldn't give up 31gpm especially on a 500 hose allowance. A fire pump is a tough sell for 31 gpm especially when the hose isn't used until the FD arrives and they bring a pump. I'd though, if as an AHJ, would make sure you really did practically max out pipe sizes. Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [EMAIL PROTECTED] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Richard Carr Sent: Wednesday, July 30, 2008 11:43 AM To: [email protected] Subject: RE: Water Supply If you plot it out on a curve you will have more than 1210 but at a lower residual pressure. Richard Carr, SET Design Manager Associated Sprinkler Co., LLC 336.373.3901 ext 217 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Burtell Sent: Wednesday, July 30, 2008 11:58 AM To: SprinklerFORUM Subject: Water Supply I have a project where the system demand with hose allowance exceeds the city supply by 31 GPM. It's still under the curve but the city flow test was 1210 and my system demand is 1241. Is there anything in the codes that allows me to exceed the city capscity? Best regards, Joe Burtell, SET, CFPS Burtell Fire Protection, Inc. Phone: 406.652.7697 Fax: 406.652.7743 Cell: 406.861.4507 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) This email and any attached files are confidential and intended solely for the intended recipient(s). If you are not the named recipient you should not read, distribute, copy or alter this email. Any views or opinions expressed in this email are those of the author and do not represent those of the company. Warning: Although precautions have been taken to make sure no viruses are present in this email, the company cannot accept responsibility for any loss or damage that arise from the use of this email or attachments. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
