Not quite. The table in 13 is for C=120 equivalent length. If you are using something other than C=120, you do have to adjust your fittings accordingly. The big loss in fittings is not the friction with the wall of the fitting, but the change in direction, like an el or tee, and/or eddies that form with a change in shape, like a butterfly or check valve.
Dave David A. de Vries, P.E., CSP Firetech Engineering Incorporated 2715 Harrison St. Evanston, IL 60201 Tel: 847-733-0944 Fax: 847-866-6255 --- On Tue, 2/10/09, Dewayne Martinez <[email protected]> wrote: From: Dewayne Martinez <[email protected]> Subject: RE: galv fittings and dry system To: [email protected] Date: Tuesday, February 10, 2009, 1:31 PM This falls under 8.4.7 which is the large drop sprinklers section so I believe it can only be applied to this section. So what we are saying is that friction loss through the fittings are independent of the c-factor of the pipe. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Tuesday, February 10, 2009 12:30 PM To: [email protected] Subject: RE: galv fittings and dry system 8.4.7.2.2 not the fittings. 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 George Church Sent: Tuesday, February 10, 2009 11:25 AM To: [email protected] Subject: RE: galv fittings and dry system I never did -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Tuesday, February 10, 2009 1:19 PM To: [email protected] Subject: galv fittings and dry system If you use galv pipe for a dry system do you also have to use galv fittings in order to use C=120 in your hydraulic calculations? Thanks, Dewayne _______________________________________________ Sprinklerforum mailing list http://lists.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) _______________________________________________ Sprinklerforum mailing list http://lists.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) _______________________________________________ Sprinklerforum mailing list http://lists.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) _______________________________________________ Sprinklerforum mailing list http://lists.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) _______________________________________________ Sprinklerforum mailing list http://lists.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)
