It's in NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances.
5.2 Size of Fire Mains. 5.2.1 Private Fire Service Mains. Pipe smaller than 6 in. in diameter shall not be installed as a private service main supplying hydrants. 5.2.2 Mains Not Supplying Hydrants. For mains that do not supply hydrants, sizes smaller than 6 in. shall be permitted to be used subject to the following restrictions: (1) The main shall supply only the following types of systems: (a) Automatic sprinkler systems (b) Open sprinkler systems (c) Water spray fixed systems (d) Foam systems (e) Standpipe systems (2) Hydraulic calculations shall show that the main is able to supply the total demand at the appropriate pressure. (3) Systems that are not hydraulically calculated shall have a main at least as large as the riser. Captain Frank J. Herrick City Of Leawood Fire Department 14801 Mission Road Leawood, KS. 66224-9560 Office: 913.681.6788 x 26 Fax: 913.681.2399 Cell: 913.238.6942 Fire Sprinklers Save Lives, Property, the Environment, and Water - Protect what you value most! _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
