This may be another one of those issues that is not clearly stated but possibly assumed by the writers. I have designed many DIPA systems in MRI and Computer equipment rooms that only had 10 maybe 14 sprinklers on them.For whatever reason the client spec'd. a DIPA they expect the best possible protection and supervision we could provide.If you aren't going to supervise the system , you're playing Russian Roulette with the situation. Maybe like buying a Mercedes because it is a good road car and then putting used recap tires on it.It defeats the purpose.
Lamar Vaughn,SET ---- [email protected] wrote: > Exactly. > > Here's another question: > > 7.3.2.4.1 Sprinkler piping and fire detection devices shall be automatically > supervised where there are more than 20 sprinklers on the system. > > -So does this is there a "non-automatic" (non-alarming) allowance for > supervision of piping for small PA systems or is no supervision required at > all? > > Craig L. Prahl, CET > Fire Protection Specialist > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29304-0491 > Direct - 864.599.4102 > Fax - 864.599.8439 > [email protected] > http://www.ch2m.com > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: Wednesday, June 09, 2010 2:24 PM > To: [email protected] > Cc: Prahl, Craig/SPB > Subject: RE: non-supervised preaction > > But that is exactly what would happen if you don't at least maintain > supervisory air on the system (SIPA).You could remove sections of > pipe,sprinkler heads,etc. and no one would know until the detection devices > tripped the system and you really have a problem. > If their problem is personel , hire someone to train them and then contract > a sprinkler contractor who has the required experience to inspect and > maintain the equipment as it should be.There are plenty of them out > there.Maybe not cheap,but available. > > Lamar Vaughn,SET > > > ---- [email protected] wrote: > > Their problem is with non-experienced personnel and contractors doing > > maintenance and testing and setting off the systems because they don't > > understand the role of the air compressors. Yeah I know it is a bad excuse > > to use but that's what they said is driving them to this. > > > > Even non-interlocked PA systems supervise the piping from every description > > I've read otherwise if a line broke you would not know it until you had a > > flow event, which is a bad time to find out. > > > > Craig L. Prahl, CET > > Fire Protection Specialist > > Mechanical Department > > CH2MHILL > > Lockwood Greene > > 1500 International Drive > > Spartanburg, SC 29304-0491 > > Direct - 864.599.4102 > > Fax - 864.599.8439 > > [email protected] > > http://www.ch2m.com > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of > > [email protected] > > Sent: Wednesday, June 09, 2010 1:55 PM > > To: [email protected] > > Subject: Re: non-supervised preaction > > > > Craig, > > Does this client have a problem with air compressors? I guess if you don't > > want to maintain supervisory air on the system then you could eliminate the > > air compressor. But that would be a noncompliant way of doing the > > system.This would then be a non-interlocked system no better than a simple > > dry pipe system.But then again,a dry pipe system requires an air supply.So > > see my original question. > > > > Lamar Vaughn,SET > > > > > > ---- [email protected] wrote: > > > Can someone provide commentary on the wording relating to "...air that > > > might not be under pressure..."? > > > > > > The client wishes to eliminate air compressors based on this wording. > > > > > > > > > NFPA 13, 2010 > > > 3.4.9* Preaction Sprinkler System. A sprinkler system employing automatic > > > sprinklers > > > that are attached to a piping system that contains air that might or > > > might not be under > > > pressure, with a supplemental detection system installed in the same > > > areas as the sprinklers > > > > > > Craig L. Prahl, CET > > > Fire Protection Specialist > > > Mechanical Department > > > CH2MHILL > > > Lockwood Greene > > > 1500 International Drive > > > Spartanburg, SC 29304-0491 > > > Direct - 864.599.4102 > > > Fax - 864.599.8439 > > > [email protected] > > > http://www.ch2m.com > > > _______________________________________________ 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)
