Craig is correct to find out what company's specific approved usage.
The manufacturers data sheets indicate UL listed for fire protection
piping. However, follow the link and takes you to UL and it lists
the companies and click on "Link to File" and it describes the use
and installation VGNJ. Note that the heating cable systems are
intended for use on piping "between the system control valve and the
system branch lines." The 2002 NFPA 13 doesn't specifically indicate
heat tracing except for the Handbook commentary. The 2007 in section
8.16.4.1.5 states, "Where listed heat tracing is utilized for branch
lines, it shall be specifically listed for use on branch lines."
Some of the manufacturers I spoke with were surprised the 2007 ed. of
NFPA 13 allows it for branch lines, and they were hoping UL would
give them a blanket approval from past testing on cable systems for
branch lines. Well, I'm sure its not going to be that easy.
We are monitoring, but haven't heard of a manufacturer of heating
cable systems listed for branch lines.
Tom Wellen - AFSA
[Sprinkler System and Water Spray System Devices] Heating Cable
Systems for Use on Fire Protection System Piping
See General Information for Sprinkler System and Water Spray System
Devices
USE AND INSTALLATION
This category covers heating cable systems intended for use on water-
based fire protection system piping to protect the piping when
exposed to freezing conditions.
These pipe heating cable systems are intended for use on piping
between the system control valve and the system branch lines. The
cable systems are intended to be installed in accordance with the
manufacturer's installation instructions, which include requirements
for permanent connection to a power supply, supervision of the power
circuit, the means of attachment of the cable, insulation and
covering to piping, and specific applications limitations.
Unless specifically indicated otherwise by marking on the heating
cable or in the installation instructions, the heating cable is
intended for use only on metallic pipes.
Note that the heating cable systems are intended for use on piping
"between the system control valve and the system branch lines."
On May 7, 2007, at 12:03 PM, <[EMAIL PROTECTED]>
<[EMAIL PROTECTED]> wrote:
Here are a few companies who have submitted and gained UL approval for
heat tracing fire sprinkler piping. Those companies are listed at the
following URL :
http://database.ul.com/cgi-bin/XYV/cgifind.new/LISEXT/1FRAME/
srchres.htm
l?collection=/data3/verity_collections/lisext&vdkhome=/data3/
verity_sw_r
ev24/common&SORT_BY=textlines:asc,ccnshorttitle:asc&query=VGNJ%3CIN%
3ECC
N+and+not+GUIDEINFO
You'll have to go out to the company's web site to find out what their
specific approved usage is.
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 Roland
Huggins
Sent: Monday, May 07, 2007 12:55 PM
To: [email protected]
Subject: Re: Electric Heat Tracing - Background
The use of heat tape went through a major change for the 07 edition,
Now there is criteria in the body that says heat tape shall be
supervised and if used for branch lines, it shall be specially listed
for branch lines. I haven't looked lately but the last time I looked
there were no such listed products.
Greg - was the Chromalox listed for BL's?
As a side note, it still says SMALL UNHEATED AREAS can use
antifreeze or
heat tracing. I would say heat trace is intended to be used only for
portions of a systems but considering there are antifreeze systems in
freezers that are 1,000+ gallon systems, I guess small is relative.
Roland
On May 5, 2007, at 5:58 PM, Dave Phelan wrote:
Hello again all,
Im looking for the wisdom and experiences off the list for projects
that used electric heat tape for freeze protection. I currently have
a
13R-2002
(metallic piped) project where the owner is looking to use the
Raychem
XL Self Regulating heat trace for supplemental freeze protection.
The
piping will be insulated as per the code but they want a belt and
suspenders.
Im looking for the code background as to why the appendix
specifically
prohibits branchlines - rather forceful language I thought to be in
the appendix and not the code itself but oh well. The project
natually is looking to heat trace the crossmains and branches up to
the drops for the concealed pendants in the living space, hence my
concern.
The product is reportedly listed UL for Fire Protection piping but I
am still awaiting all of that submission, in the mean time I need to
educate myself as to the why's and why not's in the code and
branchline prohibition.
Thank you once again.
Dave P.
An AHJ in New Jersey
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