Dave: Treat the connections as Class I for purposes of the hydraulic design (NFPA 14, 2007 7.3.4.1.2 for Class III systems without hose). Paul's exactly right: if we're using the exception to eliminate small hose cabinets, the only source of equipment for mop-up streams would be the responding fire department.
Steve Leyton Protection Design & Consulting The foregoing is the opinion of the writer alone, and does not necessarily represent the intent of the NFPA 14 Technical Committee, nor constitute a formal or informal interpretation of the standard. -----Original Message----- From: Dave Thompson [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 30, 2007 10:11 AM To: [email protected] Subject: NFPA #14 and pressures NFPA #14 states that when the static pressure at a hose connection exceeds 175 psi, a pressure regulating device shall be provided to limit the pressure to 100 psi for 1 ½" hose connections and to 175 psi for all other hose connections. What if the standpipe is a Class III utilizing the fully sprinklered building exception allowing 2 ½" hose valves with 1 ½" reducers, caps and chains? Does the pressure need to be limited to 100 psi or 175 psi? Dave David K. Thompson Vice President Allstate Fire Sprinkler, Inc. P.O. Box 2350 Hartford, CT 06146 Phone = 860-246-7711 Fax = 860-246-7707 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
