If the present system is a wet system, you may want to consider changing it over to a single interlock preation system. Single interlock systems are used in water sensitive environments and contain air pressure within the system piping for monitoring pipe integrity. Should a sprinkler or the system piping become damaged, only air pressure will be released providing a supervisory alarm, since the valve will not trip. The valve will trip only if the detection system is activated. This will only place water in the piping and no water will discharge until the sprinkler operates.
Detection systems such as air aspirating systems, or that utilize cross zoning are ways to ensure that there is an actual fire incident warranting the valve to trip. With a gaseous system, the integrity of the room must be maintained, and usually a preaction system as a back-up may be required. Regards, Salvatore Izzo, P.E. SFPE Manager - Reliable Technical Services ________________________________________ From: [EMAIL PROTECTED] [EMAIL PROTECTED] On Behalf Of Haji, Jaber M [EMAIL PROTECTED] Sent: Monday, June 23, 2008 8:44 AM To: [email protected] Subject: worried about Sprinklers leakage Newly constructed research and development lab facility is protected by a wet type sprinkler system, one of the lab scientist is worried about the accidental release of the automatic sprinkler heads on top or in the vicinity of the high tech., expensive analytical instruments such as NMR, FTMS, autospec GC/MS and ESEM , which present a potential risk of damage to these instruments in case these sprinklers kick off during actual emergency or broken by mistake by a maintenance personnel or a lab personnel. He suggests gas suppression instead. I explained to him that accidental leakage of wet type sprinkler system is very minimal. The question is what the probability of activation and how much will it cost to replace the existing system with a gas suppression system. Your recommendations/insights are highly appreciated. Jaber Al-Haji [EMAIL PROTECTED] _______________________________________________ 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)
