...epilogue...
The next time a similar situation comes up I will weigh Options A B:
Option A, step 1- start with a listed head with listed RTI and listed Temp
rating. step 2- remove RTI, Temp Rating, chance of accidental fusing, and
chance of not fusing when it should. step 3- spend a year and
Ask them if they flowed it at a specified pressure instead of velocity and you
will avoid glazed eyes. Speak their language
And no, outside its listing they likely won't stand behind it because there is
nothing to stand on.
Sent from my iPhone
On May 24, 2013, at 8:52 AM, Brad Casterline
and limitations of the deflector. IMHO.
Mark at Aero
- Original Message -
From: Brad Casterline [mailto:bcasterl...@fsc-inc.com]
Sent: Friday, May 24, 2013 12:51 PM
To: sprinklerforum@lists.firesprinkler.org
sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
...epilogue
Thanks Bruce, Ron, Steve, off-Forum dude, everyone else again, and anyone I
forgot.
Brad
-Original Message-
From: Ron Greenman [mailto:rongreen...@gmail.com]
Sent: Tuesday, May 21, 2013 4:38 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: calc procedure logic
It doesn't
@lists.firesprinkler.org;
sprinklerforum@lists.firesprinkler.org
Sent: Tuesday, May 21, 2013 7:53 PM
Subject: RE: calc procedure logic
Chris forgot to ask where babies come from. The answer - as I understand it -
to the 52,000 sq. ft. question is ... mildly amusing.
SL
-Original Message-
From
Would the 7 psi minimum operating pressure from NFPA 13 Calculation
Procedure apply to open head deluge, since the operating parts have already
been ejected clear of the frame and deflector by a ball-peen hammer?
Brad Casterline, NICET IV
Fire Protection Division
FSC, Inc.
P:
Doesn't the 7 psi also have to do with minimum pressures to develop spray
patterns properly? If so, you would still need the 7 psi minimum.
Travis Mack, SET
MFP Design, LLC
Sent from my iPhone
On May 21, 2013, at 6:03 AM, Brad Casterline bcasterl...@fsc-inc.com wrote:
Would the 7 psi
makes sense, thanks Travis
-Original Message-
From: Travis Mack [mailto:tm...@mfpdesign.com]
Sent: Tuesday, May 21, 2013 8:06 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: calc procedure logic
Doesn't the 7 psi also have to do with minimum pressures to develop spray
Subject: calc procedure logic
Would the 7 psi minimum operating pressure from NFPA 13 Calculation
Procedure apply to open head deluge, since the operating parts have already
been ejected clear of the frame and deflector by a ball-peen hammer?
Brad Casterline, NICET IV
Fire Protection Division
...@lists.firesprinkler.org
[mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of
mphe...@aerofire.com
Sent: Tuesday, May 21, 2013 8:31 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: calc procedure logic
Wouldn't it depend on the application rate, area of protection and orifice
size
will not
throw 4'-6. Thanks Mark.
-Original Message-
From: mphe...@aerofire.com [mailto:mphe...@aerofire.com]
Sent: Tuesday, May 21, 2013 8:31 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: calc procedure logic
Wouldn't it depend on the application rate, area of protection and orifice
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: calc procedure logic
Wouldn't it depend on the application rate, area of protection and orifice
size?
Mark at Aero
- Original Message -
From: Brad Casterline [mailto:bcasterl...@fsc-inc.com]
Sent: Tuesday, May 21, 2013 01:03 PM
...@nfspk.com]
Sent: Tuesday, May 21, 2013 8:37 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
The 7.0 PSI end head minimum pressure was never intended to kick out the
links, seat etc, but to develop the minimum spray pattern required to
deliver the specified density
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
The 7.0 PSI end head minimum pressure was never intended to kick out the
links, seat etc, but to develop the minimum spray pattern required to
deliver the specified density.
John O'Connor
National Fire Sprinklers, Inc
...@lists.firesprinkler.org] On Behalf Of Brad
Casterline
Sent: Tuesday, May 21, 2013 8:04 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: calc procedure logic
Would the 7 psi minimum operating pressure from NFPA 13 Calculation Procedure
apply to open head deluge, since the operating parts have already been
, May 21, 2013 11:19 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
My understanding of sprinkler design is that the cap is supposed to be ejected
away from the sprinkler regardless of the pressure available. As soon as the
element fuses, the cap springs free
deluge systems
like aircraft hangers. What do you think? Thanks for feedback.
-Original Message-
From: rfletc...@aerofire.com [mailto:rfletc...@aerofire.com]
Sent: Tuesday, May 21, 2013 1:36 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
During Phoenix summers
-
From: George Church g...@rowesprinkler.com
To: sprinklerforum@lists.firesprinkler.org
Sent: Tuesday, May 21, 2013 7:13:22 AM
Subject: Re: calc procedure logic
Except that you are designing outside the standard.
Can't recall ever even thinking of approaching an AHJ with 6 psi instead of 7
...@lists.firesprinkler.org
[mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Brad
Casterline
Sent: Tuesday, May 21, 2013 11:43 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
lol Ron!
Mark, I think there are 2 schools of thought about this, but in the case
Subject: RE: calc procedure logic
Thanks John. Assuming that is true, we could say a 1/2 head at 7 psi throws
7'-6 each way. At 7 psi the water hits the deflector going 32.26 ft/sec.
v=SQRT(2gh). At 6 psi it would be going 29.87 ft/sec, and would throw 6'-11
each way.
-Original Message
Sent: Tuesday, May 21, 2013 8:54 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
Thanks John. Assuming that is true, we could say a 1/2 head at 7 psi throws
7'-6 each way. At 7 psi the water hits the deflector going 32.26 ft/sec.
v=SQRT(2gh). At 6 psi
@lists.firesprinkler.org
Subject: RE: calc procedure logic
You are confusing velocity with vector. Same head at 50 psi doesn't go much
farther.
Go grab a head and take a match to it. The link surely clears. The cap if
upright stays. If pendant gravity takes care of it. Then you can see how
little
: Cahill, Christopher [mailto:ccah...@burnsmcd.com]
Sent: Tuesday, May 21, 2013 3:28 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: calc procedure logic
You are confusing velocity with vector. Same head at 50 psi doesn't go
much
farther.
Go grab a head and take a match
@lists.firesprinkler.org
Subject: Re: calc procedure logic
Add some dried sludge and age 20 years.
Mark, did u see the clogged drops on a DIPreAction sys up your way? I realize
we need to maintain and cure bad ones with testing, but reality testing should
include aging and normal degradation
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