What all those guys said.
On Thu, Jun 19, 2014 at 8:12 AM, Mark A. Sornsin, P.E. < [email protected]> wrote: > ..and it's also a bigger problem if you're not dealing with 8" DIP, but 50 > yr old cast iron pipe. I have seen that differentiation blown off many > times, but the repercussions CAN be significant. What is the C factor on 50 > yr. old cast iron? If you can't determine it empirically, then FM may tell > you 75 to as low as 40. Which equates to about 3.5 psi to 11 psi, > respectively, at 400 gpm (& 1,000 ft.). So which coefficient would you use > if FM was not on the job? What would "code" require? > > 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 Scott A > Futrell > Sent: Thursday, June 19, 2014 9:21 AM > To: [email protected] > Subject: RE: Location of Flow Test in Calc's > > Totally agree, however if the concept isn't understood it morphs to the > email that started this thread. 400 gpm through old 4" or 6" is a bigger > problem. > > The right way is to calculate to the flow, get the information to do it > right. If it is a single-feed loop and you are on the remote end of that > loop from the supply and the test, you need to account for the loss. > > Scott > > (763) 425-1001x12 Office > (612) 759-5556 Cell > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of IPA > Sent: Thursday, June 19, 2014 9:08 AM > To: [email protected] > Subject: Re: Location of Flow Test in Calc's > > In light & ordinary hazards it's usually not a big deal as long as you've > accounted for elevation differences. 400 gpm flowing through a thousand > feet of 8" DIP equates to a little over 1 psi friction loss. > > ______________________________________________________________________ > 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 > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
