Also, heat tracing is not approved for protecting an entire system. That is not it's intent.
You didn't state what type of building or area is being protected. Is it commercial, industrial or residential? What are the conditions and why is the building/area not heated to prevent freezing? There are some concepts utilizing plumbing systems for fire protection in residential installations where you have constant circulation by virtue of use of the plumbing fixtures. There is mention of circulating closed loop systems in NFPA 13 where the sprinkler system shared piping with mechanical heating/cooling systems. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] ________________________________________ From: [email protected] [[email protected]] On Behalf Of Nicky Marshall [[email protected]] Sent: Thursday, June 13, 2013 5:02 AM To: [email protected] Subject: Freeze prevention Is anybody aware of approved systems for freeze prevention of sprinkler pipework that involves circulating water within pipework? We are aware of dry systems, anti-freeze systems, heat tracing. A dry system requires additional water due to area increase - a tank would be needed. Anti freeze has not got very good press lately and approved products are expensive. Heat tracing does not seem like a very energy efficient system. There are circulating systems for domestic applications and internet searches show several patents for such systems for sprinklers, but I cannot find actual products. Thanks Nicky Marshall Protech Design New Zealand _______________________________________________ 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
