deluge activation in nfpa 11
deluge activation in nfpa 11
(OP)
I was wondering if it is possible to use deluge valves when I design low-expansion foam fighting system (e.g. foam chamber). I am asking that because the standard for this type of systems is NFPA 11 and it does not include Deluge foam-water spray systems. I did not read in NFPA 11 about deluge activation.





RE: deluge activation in nfpa 11
Most of these systems I have designed are FDC supply only, with big pipe. The responding department brings their own toys ,foam included, to the party. I think the criterion listed in 11 may supersede the use of a Deluge valve type system. But I will defer on this to those with greater experience.
R/
Matt
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
However; 1.3 states Deluge are not covered by 11. It sends you to 16.
R/
Matt
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
You could refer to NFPA 16 (2015 Edition) which states that Deluge system could be used with foam. Chapter 4 clause 4.2 states that " Foam-water systems shall be of the wet pipe, dry pipe, deluge, or preaction type."
BTW, deluge-foam system is a great option to protect rooms containing liquid fuels as it forms a blanket on the fuel surface which prevents fire re-ignition.
RE: deluge activation in nfpa 11
so does the NFPA 16 chapter 4 clause 4.2 refer also to NFPA 11 systems low-medium high expansion? This make sense, but I really do not understand why NFPA 11 in clause 1.3 states that Deluge systems are not covered by 11, this is a contradiction isn't it?
RE: deluge activation in nfpa 11
Since the foam you are using is low-expansion foam, you should refer to NFPA 16 to know the requirements of the water spray system you intend to use. Also NFPA 11 chapter 5 covers the requirements of the low-expansion foam system.
Hope this makes it more clear.
RE: deluge activation in nfpa 11
The Foam Makers in question do a great job of covering an area, say a pool or tank with a floating roof.
However, low expansion foam can be used in conjunction with a Deluge system, which is a different protection intent. Specifically the use of nozzles at required positions and angles around the cylinder in question. The diesel fuel you reference burns a little more easy than say crude.
So maybe the two systems are approved with the foam, but the applications are not compatible.
R/
Matt
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
Same question to you
How were you going to trip the deluge valve??
Manually or other
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
What specific heat detection were you proposing?
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
RE: deluge activation in nfpa 11
Good day!
With reference to:
But I was just asking if it is possible to use deluge valves when I design low-expansion foam fighting system and if this agree or not with the nfpa 11. I would like just to know if there are any limitation of the use of deluge valve in low/medium expansion foam systems...
In my understanding, yes! you could use a deluge valve. It is not directly mention that you should use a deluge valve, but the requirement set forth by NFPA 11 can be satisfy by it.
Per NFPA 4.9 (see below)
Hope this helps,
PAtrick
RE: deluge activation in nfpa 11
You confirmed my thought!