Yep, Number of bends with FM used to be a bigger factor than it is now. I believe it may have something with a newer test standard, but was limited to one bend per if memory serves correct. I believe for most it is 3 now.
However, if a contractor is watching their pennies (which in this day and age.....) then they we'll keep the lengths as short as possible. The price difference between a 24" and 60" is huge when you multiply it times the number of heads. Pretty difficult to get three compliant bends from a 24" flex drop. If you intend to use different lengths on a job you better make darn sure that each area specifies what you intended to your field personnel. If a 60" flexible drop is installed where a 24" should have been....it could really throw a wrench in the works. Just one in the wrong place can upset the hydraulic apple cart. Especially if used in OH1 or OH2. QC be da key! Ken Holsopple Well said Ken. Don't forget that the flexible lines are limited to the number of bends as well as their radius. Thank You Rahe Loftin, P.E. Region 7 - GSA Office - 817-978-7299 Fax - 817-978-8644 Cell - 817-371-3102 _______________________________________________ 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)
