there was a lot of chatter on this topic by the TC. At the ROP, it was accepted that a water supply curve through the BFP would be produced. That was killed at the ROC. ALL that is required is to EXERCISE the device at the full system demand. How you "prove" it can be done a couple of ways. Keep in mind that we are NOT attempting to be academically precise but looking for a good ball park number since we want a REASONABLY assurance that it is opening fully. A pitot reading on the discharge comes to mind. A known pressure point that has been calculated to provide the system demand is a good way (especially if that is the process that is used for the original submittal).
Roland On May 11, 2010, at 6:03 AM, Autry, David wrote: > ""And where in 25 does it > say I have to prove anything?"" > > > NFPA 25 (2002, Edition) 12.6.2.2 > All backflow devices installed in fire protection water supply shall > be tested annually at the designed flow rate of the fire protection > system, including required hose stream demands. > > Somehow you need to "prove" that you're flowing the required demand. > I'm pretty sure the only to do that is measure the flow. > > > David Autry _______________________________________________ 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)
