The question is now moot because they went and tested the pump by actually
flowing water and it ran fine. The problem lies in the testing process and that
is someone else’s headache.
>
> On Apr 19, 2021 at 5:05 PM,
I bet if there was a partially closed gate, or a check, or a blockage; that
might cause it.
Are they’re any good resources about testing a fire pump with a flow meter
where it feeds back into the suction piping? I have been given a couple of
tests with very screwy results. Thanks
The Exhibit 23.10 and the description in the Annex details exactly what I was
hoping to use to make sure this method is acceptable. I have used this many
times, but just needed to find the section for this one. Thanks to all the
forum for the assistance.
Travis Mack, CFPS, CWBSP, RME-G, COC,
Same orifice, no. Limits on orifice, yes...in several places such as NFPA 13
(2019) Sections 9.4.4, Chapter 21, Chapter 25, Section 27.2.4.9.2, or word
search 'factor'. Same response time per compartment, yes per Section 9.4.3.2.
Ryan L. Hinson, PE*, SET** \ Burns & McDonnell
Senior Fire
Because they first submitted and it didn't work. Long story. Was all
installed with EC sprinklers. Some things got called into question and now
when they change to 5.6k then it works. So, I'm hoping that I can use the
Exhibit 23.10 as an acceptable view to state this works and is
T Mack,
I'm not sure where it's located but I have used smaller orifice sprinklers
under a soffit as you describe. I discussed it in depth with the old VP at
AFSA and he said it was perfectly acceptable. If I can find my old emails,
I'll send them to you off-forum.
Cliff Whitfield, SET
How do you prove the designer did it to balance flow?
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860-535-2080 (tel:860-535-2080) (ofc)
860-554-7054 (tel:860-554-7054) (fax)
860-608-4559 (tel:860-608-4559) (cell)
>
> On Apr
I've had it come up in a review before. An AHJ was arguing with me that I
couldn't have a 5.6k sprinkler in an alcove and then EC sprinklers in the
corridor. Just ran into similar, but in a very large compartment for a project
I am reviewing. Technically, I believe the designer is using it
23.4.4.9 (2016 ed NFPA 13) is the only prohibitions about mixing sprinkler
sizes I'm aware of.
Mike Morey
CFPS 3229 * NICET S.E.T. 123677
Project Manager * Fire Protection Group
Shambaugh & Son, LP an EMCOR Company
7614 Opportunity Drive * Fort Wayne, IN * 46825
direct 260.487.7824 / cell
I’m not sure there is such a section. I’ve had extended sidewalls in parts of
a room and regular pendants in the other.
>
> On Apr 19, 2021 at 2:24 PM, (mailto:sprinklerforum@lists.firesprinkler.org)> wrote:
>
>
>
> I'm trying to locate the
I don't think you are going to find that. You are not allowed to vary the
k-factor along a branch line for the purposes of hydraulic balancing, but the
heads do not all have to be the same.
FM may recommend against it though - you might check data sheet 2-0
Matt
-Original Message-
Smarter guys on the forum than me I'm sure will correct me if I am wrong, but I
don't think there is a prohibition about mixing orifice sizes. Only mixing
thermal sensitivity (QR and SR). NFPA 13 8.3.3.2
Micah Davis
Principal
Phone1: (904) 800-6782
Phone2: (931) 242-1299
4373 Sycamore Pass
I'm trying to locate the section in the standard about all sprinklers in a
compartment to be same orifice. Can anyone help point me in that direction?
My searching is not too productive today.
Travis Mack, CFPS, CWBSP, RME-G, COC, SET
Engineering Manager
MFP Design
3356 E Vallejo Ct
Gilbert,
Yeah, I've done it before but wanted to see if I had been doing it
correctly. I don't like to hydraulically calculate a pipe scheduled system
as I've often seen the calcs bust causing even more headache for everyone
when it's not necessary if the pipe scheduled 'hand calc' method works -
not to
Are they’re any good resources about testing a fire pump with a flow meter
where it feeds back into the suction piping? I have been given a couple of
tests with very screwy results. Thanks
Todd G Williams, PE
Fire Protection Design/Consulting
Stonington, CT
Hey Tom,
Without explaining all of the math, if your system is 10,000 gallons and
you already had it full of water (I think you said you could fill to 70 PSI
from the city supply), with no air in the system, you would have it pumped
up to 200 psi with your little 4 GPM pump in less than 12
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