Ron,
I don't know if I've been looking at the correct edition of UFC-3-600-1,
but the only reference to velocity I can find in that a strainer must be
installed when the UG velocity is > 8 ft/sec. (Section 4-2.3.7,
UFC-3-600-01, 2006, with Change 1, 2009)
Now maybe this isn't the current one, but I can't find any other
reference to velocities in there.
PARSLEY CONSULTING
Ken Wagoner, SET
760.745.6181 voice
760.745.0537 fax
[email protected] <mailto:[email protected]>e-mail
www.ParsleyConsulting.com <http://www.ParsleyConsulting.com>website
On 12/28/2010 5:18 PM, Ron Greenman wrote:
Jamie,
Is the 18 at the flow switch a maximum to keep the paddle on the
switch or a minimum to insure the switch operates? I would think the
later.
On Tue, Dec 28, 2010 at 4:49 PM, Jamie.seidl<[email protected]> wrote:
Yes there are velocity requirements in the UFC along with the 3000 sqft HMRA.
While I don't have them in front of me, 20 or 24 fps comes to mind, and 18 fps
at the flow-switch (per UL). This always brings me back to the point of when
your calculating the HMRA, wouldn't you also need to calc the closest area? No
pressure loss = more flow? I typically do this calc when sizing a tank/pump
set up for sizing of the tank v.s. Duration... Am I wrong?
Jamie
Sent from my iPhone
On Dec 28, 2010, at 7:25 PM, [email protected] wrote:
The technical parts of this discussion have been interesting.
I may have lost something in the trail of emails, but is there anything in
UFC 3-600-01 or other UFC standards that require velocity limitations.
I have to go to Afghanistan in a couple of weeks to inspect some systems
that were done by a South Korean company. Prior to that we have to
evaluate and do calcs. where pipe was schedule sized. The fire protection
work for the bases is supposed to conform to UFC 3-600-01, but no other
govt. stds. that I know of. Because these buildings are not likely to be
long term, conservative design is not necessary and as many have pointed
out, 0.10/3000 is twice the norm anyway.
I respectfully request no political commentary with the answer.
Thanks in advance,
James L (Jim) Roberts, PE/SET | FLUOR | Principal Fire Protection Engineer
– Central Engineering | [email protected] | IODC 20.5149 | O
+1.864.281.5149 | www.fluor.com
From: [email protected]
To: [email protected]
Date: 12/28/2010 05:49 PM
Subject: Re: USACE Velocity
Sent by: [email protected]
Vince,
Believe it or not, there are considerable differences between UFC and GSA
fire protection requirements.
I feel that it is better that we compete at the higher end of fire
protection rather at the lower end.
There is difference in quality for longetivity. Anyone who thinks that
everything should be equal and minimal across the government only has to
remember the volkswagen (peoples car) that was destined to be the same for
everyone in another country.
Competition is good but it does not have to be at the low end of a business
and specs do not have to be same from owner to owner or agency to agency.
Rahe
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