2007 NFPA-13 22.4.1.2 Hydraulically Calculated - Pipe sizes shall be no less than 1 in. (25 mm) nominal for ferrous piping and 3⁄4 in. (20 mm) nominal for copper tubing or nonmetallic piping listed for fire sprinkler service.
Table 22.5.2.2.1 Light Hazard Pipe Schedules - 1" Min Table 22.5.3.4 Ordinary Hazard Pipe Schedule = 1" Min Table 9.2.2.1(a) Maximum Distance Between Hangers (ft-in.)- 3/4 - Steel - Not Allowed (N/A) Hope that helps John Drucker, CET Fire Protection Subcode Official Fire/Building/Electrical Inspector Fire Marshals Office Borough of Red Bank, NJ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of James Zimmerman Sent: Monday, June 14, 2010 4:07 PM To: [email protected] Subject: 3/4" pipe I have a specification that states nothing less than 1" pipe shall be used for a sprinkler system. Is there anywhere in NFPA 13 that prohibits the use of 3/4" pipe? I know in the 2007 Edition 8.15.19 states new installations shall have a minimum of 1" outlets for piping supplying sprinklers below ceilings. This section doesn't specifically come out and state that all piping must be 1". In 8.15.19.4 all piping with the exception of a 4" nipple shall be 1" minimum. Am I missing something or is 3/4" allowed per NFPA 13? Thanks, Jim _______________________________________________ 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)
