I have seen aboveground elevated fire mains run in our northern states. If you heat trace it should be supervised by an alarm system to ensure it is operational. You can also use a couple of temperature sensors in the section to monitor the water temperature so that if it began to approach freezing, an alarm would be initiated signaling a need to provide some type of water circulation within the piping.
I would also recommend looking into insulating the section of pipe since mechanical systems (heat tape) can fail. Craig L. Prahl Fire Protection Group Lead/SME CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Frans Stoop Sent: Friday, February 19, 2016 7:50 AM To: [email protected] Subject: Re: Routing a fire water mains over the roof Guys, Thank you all for sharing your opinions and experiences! Met vriendelijke groet/Kind regards, Frans Stoop Riskonet B.V. Singel 540, 1017AZ, Amsterdam T +31 6542 37 642 www.riskonet.com [email protected] At 10:02 19-2-2016 +0100, you wrote: >Prescriptively, I see no problem. > > >Your client will not be getting much effect-for-their-hard-spent-euro >with the galvanization. >At least that is the summation from the field data with smaller >diameter pipes. >Galvanized pipe fails just as fast as black steel, because of >imperfections in the galvanization application (e.g. pinhole leaks or >cracks when pipe is handled). If this is a water supply pipe to a fire >pump, then perhaps the pressure will be low enough to justify an HDPE >pipe. HDPE will require intensive support, but some areas are >predicting 50-100 year life for this pipe. Another alternative pipe is >GRE, which manages somehow to withstand hogging and sagging on FPSO's, >though I have heard of some of these applications letting go. > >Regarding the freeze prevention, there has to be a better solution than >heat tape, such as circulating a small flow, but as for certain on this >point, I do not absolutely know. > > >Scot Deal >Excelsior Risk/Fire Engineering >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkle >r.org > > >----- >Geen virus gevonden in dit bericht. >Gecontroleerd door AVG - www.avg.com >Versie: 2016.0.7442 / Virusdatabase: 4533/11657 - datum van uitgifte: >02/19/16 _______________________________________________ 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
