Better still, take a look at figure A.8.17.2.4.4(b) [2016]. One FDC, no
control valve directly in the FDC line, and control valves for multiple
risers.
No different than one FDC serving multiple floors in a high rise. One
FDC, multiple isolation valves.
And, yes, this was added to the 2013 edition, and remains unchanged in
the '16.
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit our website <http://www.parsleyconsulting.com/>
***
On 02/06/2017 1:52 PM, Ed Kramer wrote:
Maybe a graphic will help. Look at NFPA 13 (2013) Fig A.8.16.1.1. In
particular, the “wet pipe and dry pipe system”. The FDC connects to
the header on the supply-side of the dry and wet system control
valves. Now look at the “wet pipe system” – there is no control valve
downstream of the FDC tie-in location. But you could add one there,
since it’s on the system riser, not on the FDC pipe. If you need to
do maintenance on that system – close the added valve.
*From:* Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*[email protected]
*Sent:* Monday, February 06, 2017 3:27 PM
*To:* [email protected]
*Subject:* RE: (1) FDC or (2)
I can’t picture where your control valve is that you’re proposing but
unless something has changed in NFPA 13, there are no control or
isolation valves allowed on an FDC line.
*Craig L. Prahl**
*Fire Protection Group Lead/SME
*CH2M*
200 Verdae Blvd.
Greenville, SC 29607
Direct - 864.920.7540
Fax - 864.920.7129
CH2MHILL Extension 77540
[email protected] <mailto:[email protected]>
*From:* Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Ed Kramer
*Sent:* Monday, February 06, 2017 4:04 PM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* RE: (1) FDC or (2) [EXTERNAL]
On a single-system wet system riser, there typically is no control
valve downstream of the FDC tie-in location. By adding a control
valve downstream of the FDC tie-in location, system A can be shut down
for repair/maintenance by closing system A control valve. FDC remains
fully functional for system B. Similar in function to an underground
supply/header with multiple systems. Now if either of the FDC pipes
that connect the single FDC to the 2 system risers gets damaged, all
bets are off.
*From:* Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*[email protected] <mailto:[email protected]>
*Sent:* Monday, February 06, 2017 2:02 PM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* RE: (1) FDC or (2)
How would you shut down potential supply flow from the common FDC to
the out of service system riser?
*Craig L. Prahl
*Fire Protection Group Lead/SME
*CH2M*
200 Verdae Blvd.
Greenville, SC 29607
Direct - 864.920.7540
Fax - 864.920.7129
CH2MHILL Extension 77540
[email protected] <mailto:[email protected]>
*From:* Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Ed Kramer
*Sent:* Monday, February 06, 2017 2:34 PM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* RE: (1) FDC or (2) [EXTERNAL]
Brian, If FDC supply pipe were run from a single FDC to both system
risers, and connected to the system risers between the BFP (or other
supply check valve) and a system control valve, either of the systems
could be shut down for maintenance/repair without impairing the FDC
for the in-service system. Each system riser would need its own FDC
check valve. Doing this might require more bulk pipe and a couple
more control valves.
Ed Kramer
Bamford Fire
*From:* Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Brian Harris
*Sent:* Monday, February 06, 2017 9:31 AM
*To:* [email protected]
<mailto:[email protected]>
*Subject:* (1) FDC or (2)
I’m working on a storage building that because of the way the building
was built each “side” has its own Riser with its own FDC connection
(picture a big horseshoe shape). The architect has requested that a
single FDC be located on the corner of one of the building sides. Is
it feasible to do this and tie the systems together via the FDC pipe
or does each Riser still require its own FDC connection?
*Brian Harris, CET*
BVS Systems Inc.
Design Manager
bvssystemsinc.com <http://bvssystemsinc.com/>
Phone: 704.896.9989
Fax: 704.896.1935
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