Additionally to add to what Travis said, Smaller pipes can mean fewer or smaller seismic braces.
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 Travis Mack Sent: Wednesday, September 09, 2009 10:42 PM To: [email protected] Subject: RE: Galvanized Pipe Crappy water = relatively poor pressure for fire sprinkler system calcs. If you typically have 80 psi in your city, but one area has only 50 psi, then that area has crappy water. Or, you have City A with 100 psi throughout and City B 20 miles away with only 50 psi throughout, City B has "crappy water" relative to City A. George's point, I believe, is that often times if you use galvanized pipe, you can get similar pipe sizing as you would in a wet system. However with black pipe, you often have larger pipe sizes due to increased friction loss resulting from the lower C value. So, pay me now, or pay me later. The smaller sizing due to galvanized pipe may allow you to have a system that stays under 750 gallon capacity, whereas the larger piping associated with black pipe systems may push you over the 750 gallon limit, causing 2 systems if you can't make trip times. I think each project would be case by case, but galvanized pipe for dry systems can be very beneficial in the right cases as it relates to pipe sizing and volumes. Travis _______________________________________________ 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)
