Couple of other system types would include a combination of a water spray system around a combustible liquid container with a tank side type foam system at ground level sized for the containment area and (and I believe it's a Viking product) foam nozzles built in a manner where a trench is installed in the hanger floor to contain pipes. a grate similar to the trench drains you see in parking garages is installed and a fitting with a discharge nozzle that is compatible with the grate system. This is a very clean install and was developed in conjunction with the Navy for hangers. For some reason the Air Force prefers the high X overhead systems but tis may be due to limitations of the floor system or just plain spec writing by folks unfamiliar with any other systems. I don't know but there are a couple of other ways to put foam under wings.
On Sat, May 30, 2009 at 8:47 AM, J. Scott Mitchell <[email protected]> wrote: > I think a low level system employees strategically located oscillating turret > nozzles that apply low expansion foam to the floor area under the wings. I > would go with low level, but if the die is cast (jacta alea est) with high-ex > -- blow, go, and be happy. > > J. Scott Mitchell, P.E. > JSM Fire Protection Engineering > > --- On Sat, 5/30/09, DerBlitzkrieger <[email protected]> wrote: > > From: DerBlitzkrieger <[email protected]> > Subject: Low level foam systems > To: [email protected] > Date: Saturday, May 30, 2009, 2:10 AM > > Hello, > > I'm reviewing the design and installation for a Group I aircraft hangar of > Type I construction. The plane being worked on is a C-130J-30 and its wing > area doesn't excced 3000 ft², so I only need a sprinkler system, and a low > level low- or high-expansion foam system. > > My problem is, I cannot find a definition for what a low-level foam system > is. IE, max foam generator height, etc. I've checked NFPA 11, 16, 409, and > the glossary of terms. > > That's somewhat academic, as the system designer opted instead to go with a > roof level high expansion foam system using blower type generators, and > using the sprinkler system to actuate the system. > > This seems like the total flooding roof level system would be a better > protection route than anything a low-level system could provide. What do > you think? And what exactly makes a low-level foam system low-level? > > I would appreciate any insight into this. > > Thanks, > > Ben Young, CET > Fire Protection Construction Lead > DynCorp AFCAP > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > > > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
