If you use a hose from the compressor to the check valve and pipe thereafter;
how does the hose become any more essential than the compressor itself? If the
hose fails installed in the manner described it would have no more or less
effect than a failed compressor or power failure.
BTW, we have
The only time we were involved in anything resembling your situation we were
told by the Foam manufacturer to NOT use Galvanized piping and we were also
told the system would have to be recharged every 3-5 years.
Thank you,
Greg McGahan
Living Water Fire Protection, LLC
1160 McKenzie Road
I am designing a foam system to be fed from a limited volume public
water supply. NFPA 16 mentions a pre-primed foam system with
significant decreases in demand. I spoke to someone who knows foam
and he said that the system is filled with the foam-water mixture
instead of just water (and the
That why I said within the PRESSURE BOUNDARY of the system. Outside
of that, the comfort level of the AHJ regarding longevity would seem
to be a reasonable focus.
Roland
PS: Can we shoot this messenger too?
On Feb 11, 2008, at 12:23 PM, Greg McGahan wrote:
If you use a hose from the
And the shots at the messenger commence. (and Roland is a pretty good aim). I
sent that only as a way to show a definition for pipe, since one is not
included in Chapter 3. 3.1 Does tell us what to do for common definitions that
are not included.. The word used is Shall and not Should, in the
We nearly always (80%? 85%? of the time) do separate RCP's.
Steve Leyton
Protection Design Consulting
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Cliff
Whitfield
Sent: Monday, February 11, 2008 10:23 AM
To: sprinklerforum@firesprinkler.org
FORUM,
Wood construction with drop ceiling.
Does any one still design with a separate reflected ceiling plan and piping
plan?
Do any of the AHJ require a separate reflected ceiling plan and piping plan.
Thanks,
John
___
Sprinklerforum mailing list
True but since chap 6 has a section on Pipe and Tube, how do you
justify ignoring it. Chap 6 also confirms that components essential
to system operation must be listed. IF it is within the pressure
boundary, how do you justify it doesn't require listing? You do that
by discussing it
We have been using it for almost 15Yrs. The hose we use is a 1/2 braded
hydraulic line, with a swivel connection on one end. (Makes installation
EASY!) This hose is rated for 1500, 2000 or 2500 Psi depending upon
availability. This flexible hose connection dampens the vibration of the
From dictionary.com
pipe1 /paɪp/ Pronunciation Key - Show Spelled Pronunciation[pahyp]
Pronunciation Key - Show IPA Pronunciation noun, verb, piped, pip·ing.
–noun 1. a hollow cylinder of metal, wood, or other material, used for the
conveyance of water, gas, steam, petroleum, etc.
13:7.2.6.3.1 says the connection PIPE shall be at least 1/2 inch.
How would you as the AHJ interpret the term pipe when it is exposed
to the pressure of the system when it trips thus a source for water
loss? IF (and a big if at that) one argued that listed material is
not required as
Hello R,
We had problems with the rubber non listed hose getting hot at the
compressor end and failing due to the heat deteriorating the hose. We
switched to a Teflon non listed Hose with a braided stainless steel
jacket to solve the heat problem. It was after several conversations
with the local
We recently ran into something we have not seen and are curious as to others
experience.
Typically the connection between the air compressor and a dry pipe system is
rigid pipe, but lately we have been seeing rubber hose used. The rubber hose
does not appear to meet the standard.
How does
I did a couple of them about 15 years ago. As I remember (always
suspect) the criteria was .16/1500 with 250 hose. Essentially all you
need to do to refresh the solution is drain the system and refill. With
MIC now running rampant, this may be an invitation to a different
problem though.
Check with your foam supplier on the life of the foam. Not all will
last 3 years and life span can depend on the water quality too.
Again check with the supplier on the galvanized. Some of the foams
react with Galvanized at certain concentration levels. Usually it's not
a problem for
Chemical storage warehouse.
At 04:53 PM 2/11/2008, you wrote:
Check with your foam supplier on the life of the foam. Not all will
last 3 years and life span can depend on the water quality too.
Again check with the supplier on the galvanized. Some of the foams
react with Galvanized at
John,
At least half of my clients require a separate ceiling plan. I don't know
of anything in the code but it generally makes the prints much cleaner for
the field guys. I think it is more of a personal preference.
Cliff Whitfield
Fire Design, Inc.
-Original Message-
From: [EMAIL
In the south what you drag out into the yard to sprinkle your flowers
with is often referred to as a Hose Pipe.
So interpretation is open for debate.;)
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg,
What part of which code are you saying it doesn't meet?
Rubber is prone to decay over time, could be damaged by chemicals in the
air, subject to puncture or cuts, could be pinched off. Just not a
good idea but easier to install and cheaper, and if there's no specific
wording forbidding it,
While I'm sure that Grainger or others will supply these hose's / flexible
pipe we typically have our's made at the local auto supply house. Anyone
with the fittings and a Gates or Parker press can press the fittings. Our
AHJ's approve of this so I don't lose sleep at all, and like I said 15
Todd,
What about CAF?
On 2/11/08, Todd Williams - FPDC [EMAIL PROTECTED] wrote:
I will confess that I have never done a High-X system, but with the
relative small size of the building, the racking and the arrangement
of exits, I would be concerned from a life-safety standpoint about
it. If
Stayed in a Holiday Inn Express recently huh?LOL
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg.com
I will confess that I have never done a High-X system, but with the
relative small size of the building, the racking and the arrangement
of exits, I would be concerned from a life-safety standpoint about
it. If we use the pre-primed design, we would be OK with the water
supply. With the
I would call the 07 ed material CLARIFICATION on what was the
original intent. Keep in mind that this applies only to the 0.1
density side of the residential criteria. It is interesting that for
discharge criteria we treat the residential sprinkler as a hybrid
having to meet both the
Back in the olden days when I used to work for a living I would never
use only a steel pipe for a compressor hook-up. Somewhere there would
always be a copper loop to compensate for vibration. Now this takes
about three feet of soft copper pipe to accomplish in half inch and is
relatively time
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