There is no cookbook solution. Every situation has to be thoroughly analyzed. You need help from a materials handling engineer and sometimes a process engineer to get a handle on what exactly is going on, the design limits, the material's characteristics, system and commodity reaction to different chemical contacts, etc.
In my high speed application, an ember in the process stream was enough to set the system off to prevent it from flashing. The material and it's coating was combustible, moving in a multi-pass oven at high rate of speed. If the ember was allowed to settle the material would ignite. By detecting the ember while it was still suspended the fire could be averted. Fires in these type of ovens usually resulted in a cascade effect where the ember would gain fuel as it passed through the air stream until it became fire ball which would basically explode out the open end of the ovens towards the operator stations. Once the High-speed suppression was installed the problem went away. The drying ovens down stream were handled differently. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, 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 Ron Greenman Sent: Monday, March 29, 2010 4:13 PM To: [email protected] Subject: Re: 500 DEGREE OVEN If your moving product through this oven it's a moving target and where will the threat be when the water arrives or will you too many heads open? If it's not moving isn't the entire enclosure equally threatened? Am I seeing something that's bigger than what's actually there? On Mon, Mar 29, 2010 at 1:04 PM, <[email protected]> wrote: > I've used CO2 and Dry Chem. also used high-speed deluge (14 ms reaction from > UV detection to discharge) on material handling ovens where you've got > product moving through the oven. It all just depends on the application. > It really depends on the product and how it reacts to different suppression > elements. Some stuff you just don't put water on. > > > Craig L. Prahl, CET > Fire Protection Specialist > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > PO Box 491, 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 Ron > Greenman > Sent: Monday, March 29, 2010 4:00 PM > To: [email protected] > Subject: Re: 500 DEGREE OVEN > > Now this makes more sense to me. I think Craig's CO2 (although I usually hate > the evoking of the term CO2 I doubt if you'll have any air breathers in the > area of protection) idea is sound, or perhaps open deluge with the same > detection or a Protectowire type product. > > On Mon, Mar 29, 2010 at 12:52 PM, Robert Thompson <[email protected]> > wrote: >> Curing oven, combustible product combustible coating. In large quantity >> continuous process. >> >> >> Thank you >> Robert Thompson >> >> DAKOTA >> FIRE PROTECTION >> 1710 N. Washington Street >> Grand Forks ND 58206-5327 >> Phone # (701) 772-8820 >> Fax # (701) 772-7932 >> Email [email protected] >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Ron >> Greenman >> Sent: Monday, March 29, 2010 2:48 PM >> To: [email protected] >> Subject: Re: 500 DEGREE OVEN >> >> I'm feeling a little stupid. Why would you need to protect an oven? >> What kind of oven? What has to heated to 500 degrees that be in a contained >> vessel? Isn't this an enclosed space where the fire would be more than less >> controlled by the consumption of oxygen? Presumably the oven itself isn't >> fuel so what's in it that;'s so hazardous? I really can't figure this one >> out. >> >> On Mon, Mar 29, 2010 at 12:43 PM, Forest Wilson <[email protected]> >> wrote: >>> Probably because sprinkler water would reach temperatures in excess >>> of >>> 120* >>> (7.7.1.3.1.1) That pertains to combination systems, but I think >>> there's a similar requirement for standard wet systems. >>> >>> >>> Forest Wilson >>> >>> Project Manager >>> Cherokee Fire Protection Co. >>> 1855 Bellbrook Ave Ste C >>> Xenia OH 45385 >>> >>> PH 937-376-2333 >>> FX 614-455-4324 >>> >>> visit our blog: www.cherokee-fire.blogspot.com >>> >>> >>> NOTICE: The information contained in this email is intended to be >>> solely for the use of the named individual or entity to which it is >>> directed and may contain information that is privileged or otherwise >>> confidential. It is not intended for transmission to, or receipt by, >>> anyone other than the named addressee (or a person authorized to >>> deliver it to the named addressee). It should not be copied or >>> forwarded to any unauthorized persons. If you have received this >>> electronic mail transmission in error, please delete it from your >>> system without copying or forwarding it, and notify the sender of >>> the error by reply email or by calling Cherokee Fire Protection Co. >>> at >>> 888-347-3079 toll free. >>> >>> >>> >>> >>> -----Original Message----- >>> From: [email protected] >>> [mailto:[email protected]] On Behalf Of >>> Robert Thompson >>> Sent: Monday, March 29, 2010 3:36 PM >>> To: [email protected] >>> Subject: 500 DEGREE OVEN >>> >>> Has anyone had a problem with installing a wet sprinkler in a high temp. >>> oven approx. 500 degrees. The piping is on the exterior and a drop >>> sprinkler into the oven. An FM plan reviewer stated that FM >>> suggests using a dry system when temps run this high. >>> >>> >>> Thank you >>> Robert Thompson >>> >>> DAKOTA >>> FIRE PROTECTION >>> 1710 N. Washington Street >>> Grand Forks ND 58206-5327 >>> Phone # (701) 772-8820 >>> Fax # (701) 772-7932 >>> Email [email protected] >>> >>> >>> _______________________________________________ >>> 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) >>> >>> _______________________________________________ >>> 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) >>> >> >> >> >> -- >> Ron Greenman >> Instructor >> Fire Protection Engineering >> Bates Technical College >> Tacoma, WA >> >> Member: >> SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC >> _______________________________________________ >> 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) >> _______________________________________________ >> 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) >> > > > > -- > Ron Greenman > Instructor > Fire Protection Engineering > Bates Technical College > Tacoma, WA > > Member: > SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC > _______________________________________________ > 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) > _______________________________________________ > 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) > -- Ron Greenman Instructor Fire Protection Engineering Bates Technical College Tacoma, WA Member: SFPE, ASCET, NFPA, AFSA, NFSA AFAA, NIBS, WSAFM, WFC _______________________________________________ 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) _______________________________________________ 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)
