Yes, "just systems with large drip heads or 4.2k heads" but not smaller then 4.2k. Section 8.4.7.2.1 Where steel pipe is used in preaction and dry pipe systems, piping materials shall be limited to internally galvanized steel, is limited in scope to Large Drop heads.
Bob Knight -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Tuesday, December 08, 2009 2:03 PM To: [email protected] Subject: RE: Galvanized pipe 8.3.4.3 Sprinklers with nominal K-factors of K-4.2 (60) shall be permitted to be installed on dry pipe systems where piping is corrosion resistant or internally galvanized. 8.4.7 Large Drop Sprinklers. 8.4.7.2.1 Where steel pipe is used in preaction and dry pipe systems, piping materials shall be limited to internally galvanized steel. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Richard Carr Sent: Tuesday, December 08, 2009 1:54 PM To: [email protected] Subject: RE: Galvanized pipe NFPA does not require it but Factory Mutual does. Richard Carr, SET Design Manager Associated Sprinkler Co., LLC 336.373.3901 ext 217 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Robert Thompson Sent: Tuesday, December 08, 2009 3:45 PM To: [email protected] Subject: Galvanized pipe I know this subject has come up before. Is galvanized pipe required in all dry systems using air? Or just systems with large drip heads or 4.2k heads and smaller? Thank you Robert Thompson DAKOTA FIRE PROTECTION 1710 N. Washington Street Grand Forks ND 58206-5327 Phone # (701) 772-8820 Fax # (701) 772-7932 Email [email protected] No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 9.0.709 / Virus Database: 270.14.98/2552 - Release Date: 12/08/09 00:34:00 _______________________________________________ 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)
