2+2=4 Like Roland says ~velocity is self-limiting~ meaning you can get it going as fast as the supply pressure allows. The only "20" I have heard cities concern themselves with is city water residual pressure in their pipes.
Thanks for the nod Rocci :) brad On Nov 4, 2016 5:52 PM, "Rocci Cetani 3" <[email protected]> wrote: > We have a situation where half of a building is exposed expanded plastics > on rack storage and the other half is storage on pallets of exposed > expanded plastics. With the pump we need the pipe is large on the rack side > (8” mains and 3” branchlines) on the pallet storage its 6” mains and I can > get down to 1.5” branch lines but it jacks the velocity up to around 30-35 > in the 1.5” pipe. I don’t believe NFPA has a standard on velocities in > pipes but I know a lot of cities don’t allow over 20 ft. per second. > What’s a good bench mark not to go above? I feel a Brad explanation coming > with lots of math……. > > > > Thanks in advance for all your answers. > > > > *Rocci Cetani III, **CET* > > *Designer* > > *Water-Based Fire Protections Systems Layout, Nicet Level III* > > > > *Northern California Fire Protection Services Inc.* > > 16840 Joleen Way Bldg. A > > Morgan Hill, CA 93037 > > P-(408) 776-1580 EXT.111 > > F-(408) 776-1590 > > > > > > [email protected] > > www.norcalfire.com > > > > CONFIDENTIALITY NOTICE: This message and any document accompanying it may > contain confidential information > > belonging to the sender. The information is intended only for the use of > individual or entity named above. If you are not the intended recipient, or > the employee or agent responsible to deliver this message to the intended > recipient, you are hereby notified that any disclosure, copying or taking > of any action in reliance on the contents of this information is strictly > prohibited. If you have received this transmission in error, please > immediately notify us by telephone to arrange for return of the documents. > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
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