I have checked with one manufacturer concerning their listing if valves were in the line and their answer was that valving did not effect their listing.
So I am comfortable with using their product. From a practical standpoint I am 100% confident that the valve will not freeze if heat traced and insulated. Greg Greg McGahan Living Water Fire Protection, LLC <http://www.livingwaterfp.com> 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 On Mon, Dec 5, 2016 at 9:41 PM, AKS-Gmail-IMAP <[email protected]> wrote: > It is worthwhile to note that joint and pipe failures related to pipe > freezing are not failures located at the site where freezing takes place. > Contrary to conventional wisdom the failures are not from ice stressing > piping material. Instead it is the overpressure in the still liquid > portions of the piping caused by a decrease in space, i.e. an advancing ice > plug, that causes the breaks. The water at the break can subsequently flash > freeze due to pressure loss giving the impression it was, “ice that done > it." A dramatic usefull example of this concept is the common method of > using dry ice to freeze a line off when a shutoff valve has failed. Just > make sure there is a way to relieve the overpressure. With this in mind > there might be some instances where pressure relief mechanisms located in > strategic locations would be a good idea. > > Allan Seidel > St. Louis, MO > > > On Dec 5, 2016, at 2:37 PM, [email protected] wrote: > > You can only trace valves if the product says it is listed for protecting > valves in NFPA 13 systems or something similar. > > You can’t automatically assume you can do anything. What does the > listing state, that’s where you start. > > > *Craig L. Prahl* > Fire Protection Group Lead/SME > *CH2M* > 200 Verdae Blvd. > Greenville, SC 29607 > Direct - 864.920.7540 <(864)%20920-7540> > Fax - 864.920.7129 <(864)%20920-7129> > CH2MHILL Extension 77540 > [email protected] > > > *From:* Sprinklerforum [mailto:[email protected]. > org <[email protected]>] *On Behalf Of *Dewayne > Martinez > *Sent:* Thursday, December 01, 2016 3:53 PM > *To:* [email protected] > *Subject:* RE: pipe heat trace [EXTERNAL] > > So I can heat trace the sectional valves since they are not specifically > excluded per NFPA 13 and 14? > > *From:* Sprinklerforum [mailto:[email protected]. > org] *On Behalf Of *Roland Huggins > *Sent:* Thursday, December 01, 2016 10:23 AM > *To:* [email protected] > *Subject:* Re: pipe heat trace > > NFPA 14 has similar requirements for the dry pipe valve but this is a > sectional control valves (another term from 13 since 14 does not > differentiate by name but it helps focus the discussion). > > > Roland Huggins, PE - VP Engineering > American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives > Dallas, TX > http://www.firesprinkler.org > > > > > On Nov 30, 2016, at 12:11 PM, [email protected] wrote: > > Heat trace systems for fire protection are to be Listed for their > intended purpose. You need to look at the listing to see what the > system’s installation limitations are. Some systems may only be used for > pipe up to a certain size for example. > > No you cannot use heat tape on system valves. > > The systems are also to be electrically supervised, typically accomplished > through the fire alarm system. > > See 2013, NFPA 13, 8.16.4.1.4 – 8.16.4.1.4.2 for more info. > > NFPA 13, 2013: 7.2.5.2.3 Heat tape shall not be used in lieu of heated > valve enclosures to protect the dry pipe valve and supply pipe against > freezing. > This is under Dry Pipe Valves, there is also similar verbiage under > preaction and deluge valves in 7.3.1.8.2.3 since dry, preaction or deluge > would be the most likely systems used where the system could be subject to > freezing. it would be assumed that a wet pipe system valve would > automatically be located in a heated area. > > > > > *Craig L. Prahl* > Fire Protection Group Lead/SME > *CH2M* > 200 Verdae Blvd. > Greenville, SC 29607 > Direct - 864.920.7540 <(864)%20920-7540> > Fax - 864.920.7129 <(864)%20920-7129> > > CH2MHILL Extension 77540 > [email protected] > > > *From:* Sprinklerforum [mailto:[email protected]. > org <[email protected]>] *On Behalf Of *Dewayne > Martinez > *Sent:* Wednesday, November 30, 2016 11:17 AM > *To:* [email protected] > *Subject:* pipe heat trace [EXTERNAL] > > I need to heat trace some standpipe feed mains in a parking garage when > running from the riser room to the stairwells. Is it acceptable to also > heat trace the standpipe control valves? They would prefer to keep them > out of the stairwells. > Thanks, > Dewayne > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
_______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
