As a general rule of thumb, quick response sprinklers, which use a fast response thermal element, operate approximately 4 to 5 times faster than a standard response sprinkler when tested in the plunge test apparatus. It is important to keep in mind that RTI is a laboratory value, obtained under specific conditions, i.e., constant temperature and velocity, whether link is facing upstream or downstream, within the plunge test apparatus, and has no influence in NFPA 13 design criteria other than to identify whether a sprinkler is standard or fast response (residential, quick response, and ESFR). Regards, Salvatore Izzo, P.E. SFPE Manager - Reliable Technical Services
________________________________ From: [EMAIL PROTECTED] on behalf of Rich Pehrson Sent: Mon 5/14/2007 12:30 To: [email protected] Subject: RE: RTI Times NIST ran a number of full scale fire tests in hospital patient rooms looking at different sprinkler heads, locations, activation times, etc. The report is located here: http://fire.nist.gov/bfrlpubs/fire79/PDF/f79004.pdf Rich Pehrson Futrell Fire -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jay Stough Sent: Monday, May 14, 2007 11:07 AM To: AFSA SprinklerFORUM Subject: RTI Times We have a customer, a VA Hospital, that is trying to justify changing from Standard response to quick response sprinklers. We have discussed the RTI and other factors that make the QR's respond faster, but he is asking if we know of any time differences that are verifiable. What he needs is some idea that QR's respond in X seconds and Standard response respond in Y seconds to show the difference. I have looked in the sprinkler handbooks ( 1999 to 2007) and the Fire Protection Handbook, but only find references to RTI, no actual times. The FM standard lists 1:15 as the time for QR, but I could not find standard response. Any help is appreciated. Joseph C. Stough CET, CFPS Tilley Fire Equipment Co. Tel. 215-345-8066 X22 Fax: 215-345-9357 [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)
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