Good point of a specifically manufactured products. I was thinking
off the shelf DI pipe. I'm with you on the Hot Box of just walk away.
At 10:21 AM 4/18/2007, you wrote:
Todd,
There was a company called IPEX (800-463-9572) that came in and did a
Lunch and Learn for us a few months back. They fabricated all types of
double containment fittings for various piping systems. Depending on
the radii of the outer pipe, making the standard fitting fit, was not a
problem.
Since the request being made is one that has no specific guidelines, the
installation may have to become a little more creative to make the
system work.
DISCLAIMER: In no way am I condoning compromising the integrity of the
fire protection system.
My other alternative would be to put in a Hot Box at the Amphitheatre
and locate a horizontal dry valve there and be done with it. Sometimes
you just have to tell the architect what can and can not be done.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - work
Sent: Wednesday, April 18, 2007 10:04 AM
To: [email protected]
Subject: RE: Underground Dry Pipe
Craig,
How do you handle elbows or tees? I would think that in order to make
that work, the outer pipe diameter would have to be significantly larger
than the inner pipe, at best. Plus, you would have to cut the pipe
lengths so that radii of curvature would have the same center point. It
could get ugly. (or am I over-engineering again?)
At 09:41 AM 4/18/2007, you wrote:
>Why not run your galvanized within a ductile iron casing. There are
>pipe inserts for suspending one pipe within another (double
>containment). Then you have the DIP in contact with your soil, but the
>galvanized is still your dry system piping.
>
>
>Craig L. Prahl, CET
>Fire Protection Group
>Mechanical Department
>CH2MHILL
>Lockwood Greene
>1500 International Drive
>PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax -
>864.599.8439 [EMAIL PROTECTED] http://www.lg.com
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Richard
>Matsuda
>Sent: Wednesday, April 18, 2007 9:30 AM
>To: [email protected]
>Subject: Re: Underground Dry Pipe
>
>what kind of pipe?...good question.
>Okay, I'll stick my neck out...thinking outside of the box.
>
>CPVC is not listed for dry pipe use...but why?
>(1) is this for just overhead piping where the water in pipe of a
>wet-pipe system will help keep the pipe from failing during a fire?
>(2) or is this because air and CPVC are not compatible?
>(3) or because the air will leak out thru the CPVC?
>(4) some other unknown reason?
>
>CPVC is listed for underground use...so why not use the CPVC if reason
>(1) above is the only problem. I don't know why CPVC is not listed for
>dry pipe systems, and I'm not the AHJ on this project...so I'm just
>wondering out loud.
>
>rick matsuda, city of dallas, bldg insp dept
>
> >>> [EMAIL PROTECTED] 04/17/07 04:05PM >>>
>I've got a outdoor amphitheatre that needs sprinkler protection. The
>only option allowed to get from the controls (adjacent heated building)
>to the arch on the amphitheatre is to go underground. We will be using
>galvanized pipe for the dry system for the amphitheatre.
>
>The question is what pipe should I spec for the dry underground? Can
>(should) I use galvanized? Do you sleeve it? Any other suggestions?
>
>Thanks,
>Reed Roisum
>Fire Protection Technician
>Ulteig Engineers, Inc.
>3350 38th Avenue South
>Fargo, ND 58104-7079
>
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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