Tom, Can you verify that the reason HT is not allowed on branch lines is due to the theory that it could fuse sprinklers?
Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 Fax: 850-937-1852 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Wellen Sent: Monday, May 07, 2007 3:57 PM To: [email protected] Subject: Re: Electric Heat Tracing - Background 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 >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> To Unsubscribe, send an email to:Sprinklerforum- >> [EMAIL PROTECTED] (Put the word unsubscribe in the subject >> field) >> > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:Sprinklerforum- > [EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
