NFPA 11 (2005) section 4.7.2.5 says black steel piping in foam solution piping is to be 100. No delineation is made as to the type of system. Hence, I've been specifying worst case of 100.
NFPA 11(2010) section 4.7.2.5 states only the requirements for galvanized foam solution piping and refers back to NFPA 13 for other C-values. NFPA 13 (2010) table 22 4.4.7 indicates C of 120 allowable for deluge systems such as those feeding foam systems. Also, NFPA 13 (2010) section 12.11.1 states to install in accordance with NFPA 11. Seems a bit circular. Anyone know the reason for the change? Am I interpreting it correctly? Thanks, Ryan L. Hinson, EIT, NICET III Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell Minneapolis-St. Paul Office 8201 Norman Center Drive, Suite 300 Bloomington, MN 55437 Direct: 952-656-6003 Ext 3662 Fax: 952-229-2923 [email protected] www.burnsmcd.com<BLOCKED::www.burnsmcd.com> Proud recipient of PSMJ's Premier Award for Client Satisfaction _______________________________________________ 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)
