The 13 handbook commentary for 14.4.4.5 (2002) does not include any decrease for copper and I have never used one. 2010 has similar language. The FP handbook does not address it. My questioning is on the degradation of copper pipe and decrease in C Factor because of it. Never heard of it before. This water department person tends to pull things out of his Botox, but I want to be sure before I challenge him.
At 06:28 PM 12/17/2009, you wrote: >My reference manual lists the range for copper >as 150-120. So I would say it is within reason. > >Matt Grisé PE*, LEED AP >Sales Engineer >Alliance Fire Protection >*Licensed in KS & MO > >913.888.0647 ph >913.888.0618 f >913.927.0222 cell >www. AFPsprink.com > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Todd Williams >Sent: Thursday, December 17, 2009 5:08 PM >To: [email protected] >Subject: C factor in old copper pipe > >I am working on a 13D system which is fed by a copper pipe from the >public supply. I have been asked by the water company (who has review >authority in this situation) to decrease the C factor for the copper >pipe from 150 to 120 due to age. I have done this several times in >steel and CI pipe, but never in copper. Is this appropriate? > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, Connecticut >www.fpdc.com >860.535.2080 >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.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) >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
