Thanks B-RAD! Have a good weekend
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 <mailto:[email protected]> [email protected] <http://www.norcalfire.com/> 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. From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Friday, November 04, 2016 4:22 PM To: [email protected] Subject: Re: velocity in pipes But as a bench mark, at 37 ft/sec is where Darcy-Weisbach starts exceeding Hazen-Williams in psi/ft friction loss. Brad On Nov 4, 2016 6:03 PM, "Brad Casterline" <[email protected]> wrote: 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 <tel:%28408%29%20776-1580%20EXT.111> F-(408) 776-1590 <tel:%28408%29%20776-1590> [email protected] www.norcalfire.com <http://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
_______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
