Table 9 in my FM Global Hydraulics Tables has Age Factors for public and fire pro mains and Table 6 has coefficients for underground piping based on age of pipe and water corrosiveness. Probably not what you are looking for though??
Reed A. Roisum, CET Engineering Technician Direct: (701)280-8580 Cell: (701)212-8810 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of A.P.Silva Sent: Tuesday, April 20, 2010 5:37 PM To: [email protected] Subject: RE: C-Factor I remember FM used to have a requirement for old piping. Not sure if it is still there. Tony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Leyton Sent: April 20, 2010 4:34 PM To: [email protected] Subject: RE: C-Factor Table 22.4.4.7 for C-factor values; I'm not aware of any code or standard-based requirement for using a certain C-value on older systems, but the reason that a C-100 value is used for dry systems is to account for the fact that the interior piping surface is subject to more aggressive deterioration than in a wet-pipe system. I wonder if anyone else has experience with calculation of VOP (very old piping) ... Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, April 20, 2010 3:13 PM To: [email protected] Subject: C-Factor Can someone tell me were in NFPA-13 dose it talk about the C-Factor for pipe. I am doing a calc. on an old system and I know I have to change the C-Factor but I can not find it in the code book. I found it somewere elese and it says in old pipe i must change the C-Factor like new black pipe for wet systems will be 120 C-Factor but if its 50 years old I must chage it to 90. Can someone tell me were to find this info. Thank You _______________________________________________ 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) __________ Information from ESET NOD32 Antivirus, version of virus signature database 4946 (20100315) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 4946 (20100315) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com _______________________________________________ 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) _______________________________________________ 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)
