Dave,
I have not seen this problem in buildings where the sprinkler piping is in climate controlled spaces; however, I have seen this problem in buildings which have sprinkler piping above suspended ceiling tiles (sometimes steel decks, sometimes metal on steel frame and sometimes insulated metal on steel frame above the suspended ceiling tiles). The temperatures in the spaces above the suspended ceiling tiles usually fluctuates depending on the outside temperatures. This problem is also fairly common in commercial/industrial buildings (typically steel deck or insulated steel frame) where the heat sources are sparsely spaced gas-fired heaters (i.e. chilly in the winter and hot in the summer time!). Rodney K. Hamm, P.E. President/Owner Falcon Fire Protection Office (478) 953-1677 Cell (478) 396-6988 Date: Tue, 03 Mar 2009 17:55:00 -0500 From: Todd Williams <[email protected]> Subject: Re: statistics To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii"; format=flowed Rodney, Nice work. One question, though. If the sprinkler system is in a temperature controlled space, why would outside air temperature cause pressure fluctuations? Couldn't this be caused by additional pumps activating to fill tanks and the pressure increases are a result of this? Bleeding the air could eliminate compression in the system, from whatever cause, thus lowering the false alarm problem. Have you conducted your experiment in all four seasons? _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
