WHOA- I don't think there's a prohibition on them, but "readily obtainable" "manufactured with long lead time" "not on the truck at the site when we needed it" Are examples of how different people interpret "available" without getting in to semantics.
While I'm not an engineer (or even a designer or a Mote) I'd think that the loss thru a bushing would vary with the configuration in which it was installed. Doubt you'll find any empirical data to support anything, why not just use the loss for a reducing fitting and use the loss thru the smallest diameter ? If its for peace of mind, the level of accuracy should be sufficient that it either does or doesn't work within a relevant range. Hopefully they left a 40 PSI cushion that only reduces to 39.9 psi ad you can sleep well. How's that for optimistic? glc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Pinigis Sent: Monday, March 12, 2007 2:03 PM To: [email protected] Subject: Equivalent length of bushings Does anyone out there know where I can find the equivalent length of various bushings that were installed in a system. I know that NFPA 13 does not permit the use of bushings, and that they do not require additional equivalent length to be added to the calculations for the bushings, but I would like to include them in our calculation for peace-of-mind. Paul Pinigis Hankins and Anderson Consulting Engineers 4880 Sadler Road Suite 300 Glen Allen, VA 23060 v: (804) 285.4171 f: (804) 217.8520 http://www.haengineers.com _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
