Thanks for the insight Mike. Greg Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 Fax: 850-937-1852
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mike Brown (TECH- GVL) Sent: Friday, May 04, 2007 2:22 PM To: [email protected] Subject: RE: 1/2" thread - 8 K sprinklers Gentlemen and Ladies; For years the 1/2 inch threads and the 3/4 inch threads were used to identify the type of sprinkler. In general, 1/2 inch threads with a 1/2 inch orifice was the base line and if the orifice was less than 1/2 inch the sprinkler had a pintle on the deflector. Then when 8.0 K Factor sprinklers were developed the 3/4 inch threads were used to identify them as 8.0 K factor (17/32" Orifice) Then when the 11.2 K Factor (.64 Orifice) came on the scene most manufacturers used a pintle on them to identify them as different from an 8.0 K sprinkler since both had 3/4 inch threads. Retrofit sprinklers were developed with an 8.0 and even a 11.2 K Factors but with a 1/2 inch threads . Their use was restricted to systems that were existing but were being upgraded to a higher density. The use of SIN numbers sort of negates all of this but the language is still in NFPA 13. Michael L. Brown The Reliable Automatic Sprinkler Company Technical Services -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tony Liddic Sent: Friday, May 04, 2007 2:17 PM To: [email protected] Subject: RE: 1/2" thread - 8 K sprinklers Charles, NFPA 13 (2002) 8.3.5 Thread Size Limitations Tony Liddic, CET Fire Sprinkler Designer AEC Fire & Security 400 Fame Rd. West Carrollton, OH 45449 937-866-4158 937-865-0212 fax [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles Thurston Sent: Friday, May 04, 2007 2:12 PM To: Greg McGahan Subject: Re: 1/2" thread - 8 K sprinklers Hello Greg, Wednesday, April 25, 2007, 12:19:42 PM, you wrote: > NFPA 13 clearly states that we can not use 8.0 k heads with 1/2" threads in > new installations. I assume there are reasons for this but I do not know > them. Does anybody have the chapter and verse where it states this handy ? I can not find it. > BUT, we have a new job with pipe on the floor and 1/2" welded outlets for > 5.6 k sprinklers. The problem is we ran into some lights and are having to > move some pipe which blows our calcs. (Our designer made a mistake and did > not realize that the lights are not hanging, but are mounted to the > purlins.) > We had in excess of 10% cushion and now we have -5%. If we use the 8K heads > we are fine. > The other option is to reorder all of the branchline piping 1 size larger. > We reflowed the hydrants to confirm the water and lost 10 psi residual to > make matters worse. > Does anyone on the committee have any input before I ask the AHJ to consider > this change? > Greg > Living Water Fire Protection, LLC > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > Fax: 850-937-1852 > _______________________________________________ > 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) -- Best regards, Charles mailto:[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) No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/787 - Release Date: 5/3/2007 2:11 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/787 - Release Date: 5/3/2007 2:11 PM _______________________________________________ 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) _______________________________________________ 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)
