So it makes a difference if you add pressure to the pump suction side of the pump or the discharge side when you are adding pressure with a variable pressure pump controlled by a trained pump operator? And what is the fear of over-pressurizing the system? That you'll blow it apart? I'm really curious about these issues as the concerns seem to be in the same category as the "what if aliens attack at the same time a fire breaks out" type scenario. Am I missing something? What is the "real" danger involved in over-pressurization? We're not talking superheated steam in a Challenger Steam locomotive.
On Fri, Sep 25, 2015 at 2:39 PM, Matt Grise <[email protected]> wrote: > The last time we did a remote FDC on a system with a pump (with a BFP out > in the vault), the fdc was required to be run back to the building and > connected downstream of the pump. > > Pumps boost pressure - if the fire pump boosts a supply that is already > boosted by the FDC then there is a real danger that the system will be over > pressurized. > > Matt Grisé PE*, LEED AP, NICET II > Sales Engineer > Alliance Fire Protection > 130 w 9th Ave. > North Kansas City, MO 64116 > > *Licensed in KS & MO > > 913.888.0647 ph > 913.888.0618 f > 913.526.7443 cell > www. AFPsprink.com > > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Friday, September 25, 2015 4:35 PM > To: [email protected] > Subject: RE: FDC on Fire Pump > > What happens when the fire department pumps into the FDC with more than > the normal street pressure and over pressurizes the system? > I think that you would need to separate the FDC from the city supply. > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of rongreenman . > Sent: Friday, September 25, 2015 8:36 AM > To: [email protected] > Subject: Re: FDC on Fire Pump > > Devil's advocate. The code says there can be not control valve in the FDC > line (itself). It also has to be downstream of the check valve that > separates the source from the system so you don't pump a loop back to the > pumper. I don't recall off the top of my head anything that says you have > to be able to isolate the pump without effecting the FDC but I'll buy Ed's > statement since I can't refute it without actually opening a book and it > just makes sense. But lets assume a vault in the yard with a DCVA, PIV and > FDC tied in after the last control valve there, then say 200 ft of UG to a > pump with a by-pass loop and then to a manifold with five risers. Then take > the pump out completely and tell me what's different than the place next > door without a pump. In the first example do I have to run that FDC line > 200' extra feet to tie it in after the pump but not do the same on the > place with no pump? > > On Fri, Sep 25, 2015 at 8:22 AM, Brian Harris <[email protected]> > wrote: > > > Sounds nice but I only have the 2007 edition..... > > > > Brian Harris, CET > > BVS Systems Inc. > > bvssytemsinc.com > > > > > > -----Original Message----- > > From: Sprinklerforum [mailto: > > [email protected]] On Behalf Of Larry > > Keeping > > Sent: Friday, September 25, 2015 10:49 AM > > To: [email protected] > > Subject: RE: FDC on Fire Pump > > > > The schematic that you are remembering might be Figure A.4.20.1.2(b) > > of NFPA 20-2013, which shows a FDC downstream of all of the control > > valves and check valves associated with the fire pump installation. > > > > Larry Keeping > > > > -----Original Message----- > > From: Sprinklerforum [mailto: > > [email protected]] On Behalf Of Brian > > Harris > > Sent: September-25-15 9:48 AM > > To: [email protected] > > Subject: RE: FDC on Fire Pump > > > > For some reason I thought I remembered seeing a schematic but > > apparently not. So as long as the FDC ties into the pump discharge > > downstream of the discharge check valve I'm good to go correct? > > > > Brian Harris, CET > > BVS Systems Inc. > > bvssytemsinc.com > > > > -----Original Message----- > > From: Sprinklerforum [mailto: > > [email protected]] On Behalf Of > > [email protected] > > Sent: Friday, September 25, 2015 9:41 AM > > To: [email protected] > > Subject: RE: FDC on Fire Pump > > > > 13 (2013) 8.17.2.4.8 > > > > -----Original Message----- > > From: Sprinklerforum [mailto: > > [email protected]] On Behalf Of Brian > > Harris > > Sent: Friday, September 25, 2015 6:40 AM > > To: [email protected] > > Subject: FDC on Fire Pump > > > > Glad its Friday but I must be having a brain cramp..... Where does it > > specify where the FDC ties into the pump discharge? > > > > Brian Harris, CET > > BVS Systems Inc. > > Sprinkler Division > > bvssystemsinc.com<http://bvssystemsinc.com/> > > Phone: 704.896.9989 > > Fax: 704.896.1935 > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > > er.org _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > > er.org _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > > er.org _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > > er.org _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > > er.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 > _______________________________________________ > 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 > -- 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
