The intent is to get anything in the pipe that could impact sprinkler system
function, out of the pipe before connecting it to the sprinkler system. So,
while 10 fps is the minimum flow, depending on the system demand, the flow rate
needs to be what it would be for the maximum design flow, which might be
greater than 10 fps.
On Tuesday, January 28, 2025 at 05:11:34 PM EST, Steve Leyton
<[email protected]> wrote:
Sprinkies:
Section 6.10.2.1 (2022 edition) of NFPA 13 prescribes a minimum flow rate of 10
fps for flushing, and Table 6.10.2.1.3 offers flow minimum rates for different
pipe diameters that will achieve that velocity. My question is (the one
that’s been posed to me by an inspector) is whether or not there’s an absolute
minimum flow rate in GPM based on size. A contractor has proposed to flush a
4” UG through a 1½” connection with “several hundred feet” of 1½” hose to a
collection point. The inspector is questioning (and I’m wondering also) if it
is required or is the intent to flush to at least the demand of the system, or
some other benchmark flow? For whatever it’s worth Table 6.10.2.1.3
(10.10.2.1.3 in NFPA 24) starts at 2”, so I’m also curious if that implies that
2” is the minimum allowable size for a flushing connection?
Steve Leyton, President
T | 619.255.8964 x 102 | www.protectiondesign.com
2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108
Fire Protection System Design| Consulting| Planning| Training
_________________________________________________________
SprinklerForum mailing list:
https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org
To unsubscribe send an email to [email protected]
_________________________________________________________
SprinklerForum mailing list:
https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org
To unsubscribe send an email to [email protected]
