Ultra High Speed Deluge will trip within 200 milliseconds of detection. Presuming detection at the first glimmer of a spark this is supposedly fast enough to arrest an explosion. Very sensitive spark detectors everywhere under low light conditions. The Navy used to really like these things but somehow got conned into saving money by using those old rate of rise pneumatic detection (think Suprotex with those copper tube thingies so that increasing air pressure moves the mercury switches) making the Ultra Slow Speed Deluge.
On Wed, Feb 23, 2011 at 2:42 PM, Stewart Kidd <[email protected]> wrote: > Coal is crushed in power stations by ball mills and is then blown into > boilers by forced draft fans to be burnt like oil. I spent 10 years in power > gen and used to be a member of NFPA 850 and I have never heard of non > combustible coal. > > The coal which someone mentioned as being spontaneously combustible is, I > think, known in the US as Powder River Coal. Bulk coal carriers often > experience spontaneous heating of coal in their holds on long transits - > usually caused by moisture content. > > Agree sprinklers will not stop explosions - after withdrawal of halon 1301 I > 'd like to hear what will. Any number of explosions in grain, flour and > sugar silos every year - these can be disastrous. > > Stewart > On 23 Feb 2011, at 22:20, A.P.Silva wrote: > >> They claim the coal is crushed to powder form before being brought into the >> building, and that the powdered coal has been tested to be non-combustible. >> I'm waiting for the report. >> >> Tony >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of njarendt >> tds.net >> Sent: February 23, 2011 2:43 PM >> To: [email protected] >> Subject: Re: Fertilizer Plant >> >> Never heard of coal dust being noncombustible. We have employees up in the >> mines and it is combustible and explosive per them. >> >> Norm >> >> On Wed, Feb 23, 2011 at 3:41 PM, A.P.Silva <[email protected]> wrote: >> >>> Coal dust is used in a process to manufacture fertilizer, in a 40,000 >>> sq.ft. >>> building, about 28 feet high. The issue is whether the building has to >>> be sprinklered. The owner claims the coal is non-combustible and thus >>> the building occupancy is low hazard industrial, in which case it >>> would not have to be sprinklered. Anyone can comment on the occupancy? >>> >>> Tony >>> >>> _______________________________________________ >>> 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) >>> >> >> >> >> -- >> Norman Arendt, CHS III, CMAS, PhD, CFEII President Infragard Madison Members >> Alliance Middleton Fire District Plan Reviewer and Investigator PCII and CVI >> Certified _______________________________________________ >> 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) > > _______________________________________________ > 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 Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) _______________________________________________ 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)
