The existing systems are all OH pipe schedule (with 3/4" pipe) and
the vacant building would be LH. The other consideration is that they
currently have two 1500 gpm pumps taking suction from a pond and part
of the program would be to connect it to the public supply.
Hydraulics and other factors would be taken into consideration, but
the pitch issue is the most complicated. Besides, with 1,500,000
sqsft of pipe network, we'd have to bring in anti-freeze in tank cars....
At 07:29 AM 9/30/2008, you wrote:
When converting systems from wet to dry don't we also have to consider the
hydraulics ?.
Is it acceptable to simply convert them to antifreeze and retain the wet
performance ?
John Drucker
Fire Protection Subcode Official (AHJ)
New Jersey
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dewayne
Martinez
Sent: Tuesday, September 30, 2008 7:20 AM
To: [email protected]
Subject: RE: Alternate to pitch?
What about pitching the lines and then heat tracing the mains and aux
drains per 8.16.4.1.3 (13 02ed)?
I don't think this is the best option but you were looking for
alternative ideas.
Dewayne
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - FPDC
Sent: Monday, September 29, 2008 4:00 PM
To: [email protected]
Subject: Alternate to pitch?
I visited a site the other day which consisted on 1.5 million sqft of
vacant industrial buildings built in the 1950's. The cost to heat these
building is astronomical and the owners are looking for cut costs. They
would like to convert the 30 +/- systems from wet to dry.
Obviously the biggest obstacle is pipe pitch. Some of the lines appear
to pitch, but most lines and mains are flat (caveat: I have not gone in
with a level to check it, but rod lengths looked the same). The lines
look like they could be pitched, but the mains would be a challenge. Are
there any alternatives out there? I don't know of any, but I didn't know
if the collective mind had run across anything.
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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