Roland:
NFPA 2007 8.16.4.1.3
" Where above ground water-filled supply pipes, risers, system risers, or
feed mains pass through open areas, cold rooms or passageways, or other
areas exposed to temp. below 40'F the pipe shall be protected against
freezing by insulating coverings, frost proof casings, listed heat tracing
systems, or other reliable means capable of maintaining a minimum temp.
between 40'F and 120'F."
So I would say that yes a riser heat traced and insulated does not need a
"riser room" (Maybe hot box will start to make boxes for our risers as well
as the backflows?)
An interesting question arises tho from the 120'F max temp, especially in
the SW. Is your riser room ventilation able to keep the temp below 120'F?
Or should we notify the Arch. that A/C may be required in riser rooms.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Roland Huggins" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, March 13, 2008 3:06 PM
Subject: Re: Dry System Size
Had someone that was adamant that they were going to protect the valve
riser with heat tape. Despite being a bad idea with little chance of
success, I couldn't say - You gotta have a valve room although I THOUGHT
it was an explicit requirement. Implicit doesn't carry the day.
Ughhhhhhhh.
Roland
On Mar 13, 2008, at 10:26 AM, <[EMAIL PROTECTED]>
<[EMAIL PROTECTED]> wrote:
Doesn't specifically say you HAVE to have one but in order to provide
heat for a dry valve in an open space it's the only choice. NFPA 13,
2007, 7.2.5.2
Craig L. Prahl, CET
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