I would bet not. My opinion is that the largest cause of the water "migration" in an anti-freeze system is the result of thermal expansion/contraction of the volume of the fluid. If the pressure differential at the check valve is sufficient, dilution by migration should be minimal.
Mark at Aero 602 820-7894 Sent from my iPhone > On Nov 13, 2014, at 10:42 AM, "Mark A. Sornsin, P.E." <[email protected]> > wrote: > > So as the N2 is absorbed by the antifreeze, is there any loss of volume (and > subsequent reduction in pressure) in the piping that would allow water to > migrate into the AF lines? If so, how much? Or does the 'Nitrogenated' AF > solution simply expand to occupy the space held by the pure N2 under the same > pressure? > > 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 [email protected] > Sent: Thursday, November 13, 2014 11:32 AM > To: [email protected] > Subject: RE: Antifreeze-recipe for disaster? > > I would bet the nitrogen never "leaks out of the system", based on Henry's > Law, as the nitrogen dissolves into solution under pressure. And by using > nitrogen as the pressurizing agent, no increase in oxidation (corrosion) is > imparted. I'm aware that nitrogen has been used to pressurize sprinkler > piping for various reasons for at least thirty years. > Mark at Aero > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Mark A. Sornsin, P.E. > Sent: Thursday, November 13, 2014 9:01 AM > To: [email protected] > Subject: RE: Antifreeze-recipe for disaster? > > C'mon, Todd. WHY is he the missing link? > > > ...because there is no way of know with certainty how much water will enter > the AF piping after all of the N2 eventually leaks out. The presents the > possibility of a freezable AF system. I suppose one could calculate the exact > volume of the AF piping and measure the exact amount of AF pumped into the > system prior to charging with N2, proving that the water couldn't migrate too > far.... I would hope that approach was well documented prior to the freeze > event and lawsuit. > > 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 Todd Williams > Sent: Wednesday, November 12, 2014 8:13 PM > To: [email protected] > Subject: Re: Antifreeze-recipe for disaster? > > No, but I think the guy that did it is the missing link. > > Todd G Williams, PE > Fire Protection Design/Consulting > Stonington, CT > 860-535-2080 > www.fpdc.com > > >> On Nov 12, 2014, at 8:58 PM, Thomas Watt <[email protected]> >> wrote: >> >> I recently encountered a scenario which I felt this group would enjoy >> chewing on. >> While draining an AF system to replace another leaking(@brass/steel >> interface) no-torque head adapter, huge bursts of mist, aerosolized >> glycerin mix, came out. >> It seems that this company has an s.o.p. of pumping af into dead end >> system(no purge) using a cheap pump which only permits about 50psi. >> They then jack the system pressure above static with compressed nitrogen. >> Has anybody ever seen this done before? Am I off base here or is this >> possibly the missing link? >> _______________________________________________ >> 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-firesprinkler.org > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please visit http://www.symanteccloud.com > ______________________________________________________________________ > > ______________________________________________________________________ > 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 > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please visit http://www.symanteccloud.com > ______________________________________________________________________ > > ______________________________________________________________________ > 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
