The earliest density/area curves were not based on fuel loads but 'what will light, ordinary, and extra haz pipe scheduled systems deliver with low, medium, and high Water Supplys' :)
b On Dec 9, 2015 3:00 PM, <[email protected]> wrote: > Foam-water deluge with autonomous, GPS interfaced, thermal seeking, > oscillating high pressure foam cannons, go large or go home. ;) > > Seriously, if a client specifies a certain system and chooses not to heed > your alternative recommendations, you provide it as requested since they're > paying for it and they are paying you to design it. > > I wonder how long ago that 0.15 criteria was developed? Probably when > cars were mostly steel? For today's plastic cars I doubt that would have > much affect then add Hybrids with batteries. > > Craig L. Prahl > Fire Protection Group Lead/SME > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29303 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Steve Leyton > Sent: Wednesday, December 09, 2015 3:06 PM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > Those are nice pictures. Many of them don't actually show fires at > filling stations (at least one shows a collision with a tanker truck). > Those that do include a lot of vehicle fires and many of those are outside > of the area of the canopy. If you go to NFPA's website, you'll find at > least a couple pages that underscore that this is a low rate-of-occurrence > event and that 61% of these fires are classified as vehicle fires (back to > OH1 are we?). Look, I don't want anyone to think I've lost my passionate > concern for public safety, but there is a cost-benefit equation to just > about everything, including the standards we use every day. I think that > the information I've seen on The Internets (including what's to be inferred > from the Google images of gas station fires) underscores what I said > yesterday. It's not a compelling risk from the perspective that it's not a > high percentage risk of occurrence, and it's definitely not a flammable > liquids storage issue. > > If anyone out there wants to pay for a foam suppression system, I will NOT > discourage them, but if I were their consultant I would not be programming > one on their behalf. > > > http://www.nfpa.org/safety-information/for-consumers/vehicles/service-station-safety > > > http://www.nfpa.org/research/reports-and-statistics/fires-by-property-type/business-and-mercantile/fires-at-us-service-stations > > > SL > > > > > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of David > Blackwell > Sent: Wednesday, December 09, 2015 11:54 AM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > Google "gas station fire" and select the images tab to see some big gas > station fires. [If you don't select "images" the top story is about "Man > trying to kill spider ignites gas pump fire - CNN Video"] > > Respectfully, > > > David W. S. Blackwell, II, PE, CFPE, CFI I Chief Engineer Office of State > Fire Marshal SC Department of Labor, Licensing, & Regulation, 141 > Monticello Trail, Columbia, SC 29203 > Telephone: 803.896.9800 [Office] 803.896.9833 [Direct] > Fax: 803.896.9806 [Office] > Email: [email protected] > Website: http://www.scfiremarshal.llronline.com/ > > > Please note that you can find a lot of information on our website at > http://www.scfiremarshal.llronline.com/ including contact information, > current events, laws, regulations, policies, forms, procedures, and links > to other website resources for further information. > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Steve Leyton > Sent: Tuesday, December 08, 2015 5:19 PM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > *** SCDLLR NOTICE *** This email is from an external email address. Please > use caution when deciding whether to open any attachments or when clicking > links inside the email. > > EXACTLY. None of us has ever seen a gas station fire in all likelihood > because the equipment is equipped with so many fail-safety devices and so > long as idiots aren't smoking or lighting incense as they refuel, it's very > low risk, empirically speaking. If there's a fire on the ground, how well > does a canopy trap heat? With no walls, the horizontal movement of > byproducts is going to be fairly high-velocity, no? Unless you have some > fire modeling or test data in hand, your and my guesses are the best we're > going to have with regard to the chances of sprinklers skipping or even > operating at all. The AHJ is probably requiring sprinklers for the reason > you state - so he/she can sleep at night, so give them sprinklers. > > As to the use of foam by responders, I think everyone would agree that > there's a significant difference in the metrics of programming operations > in a muni fire department than in the cost-benefit analysis of a fixed foam > extinguishing system and the impact it would have on the design of the > protected premises. Water has been successfully fire tested in flammable > liquids fires, from mist to ESFR. So if the AHJ wants sprinklers, give > them "sprinklers". > > SL > > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Tuesday, December 08, 2015 2:04 PM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > Wow, really? What is that stuff the guys in the red trucks spray on > liquid fuel spills and over car fires? > > Hate to disagree but OH I is even questionable for a parking garage > regardless of what NPFA says and for a gas station well it's just silly. > I've never seen a little gas station fire. > > But at the end of the day you do what allows you to sleep at night. > > Craig L. Prahl > Fire Protection Group Lead/SME > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29303 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Steve Leyton > Sent: Tuesday, December 08, 2015 4:51 PM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > Please, stop. This is NOT flammable liquids storage. Foam and wind > effect and all this other stuff is Henny-Penny-the-sky-is-falling > distraction (IMHO). 7.3.5.2 of 30A states, " Where required, an automatic > fire suppression system shall be installed in accordance with the > appropriate NFPA standard, manufacturer's instructions, and the listing > requirements of the systems. Obviously, NFPA 13 doesn't have a > prescriptive for fuel island canopies, so let's use some common sense. > The fuel is stored in UG tanks away from the islands and retail store or > cashiers hut. NFPA 30 doesn't apply as this isn't storage, but Chapter 18 > states that when a hose is used in the transfer of F/C liquids as part of > an "incidental operation", it shall be equipped with a self-closing valve. > That's what a automotive fuel hose does - it's a dead man that kicks off > from several triggers including back pressure and impact. So the movie > scene of a guy having a heart attack and squirting a steady stream of fuel > into the air as a crow drops a burning cigarette butt into the pool is ... > far-fetched. At most, we can reasonable expect that there could be a quart > of gasoline on the ground if there's an accident, so we would be protecting > for that and the cars at the island that are ostensibly full or nearly full > of fuel. Just like in an OH 1 parking garage. > > OH 2 if it's a month ending in Y ... my 3ยข. > > SL > > > > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of > [email protected] > Sent: Tuesday, December 08, 2015 10:25 AM > To: [email protected] > Subject: RE: Canopies Over gas Pumps > > This is outside the purview of NFPA 13. > > You're dealing with flammable and combustible liquids, hydrocarbons on > which water alone will have limited affect. > > For fuel loading/unloading stations it is common to employ foam-water > deluge for the area below the canopy. > > Also an option is dry chemical. Pyrochem has a system called ATTENDANT II > (distributed by Tyco) > > The HAJ would have to approve either one but more tend to lean towards a > sprinklered solution than a one-shot gaseous system. A very windy day > could totally render a gaseous extinguishing system useless. > > For design you do need to consider wind effect on your system discharge. > Don't get swayed into the minimum .16 gpm/sf permitted on foam-water > systems. You can have coverage issues again due to wind influences. > > NFPA 30, NFPA 30A, NFPA 16 and NFPA 2001 are good places to start. > > Good luck and have fun! > > Craig L. Prahl > Fire Protection Group Lead/SME > CH2MHILL > Lockwood Greene > 1500 International Drive > Spartanburg, SC 29303 > Direct - 864.599.4102 > Fax - 864.599.8439 > CH2MHILL Extension 74102 > [email protected] > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of James > Crawford > Sent: Tuesday, December 08, 2015 1:04 PM > To: [email protected] > Subject: Canopies Over gads Pumps > > Looking for some direction on the protection of a Gas Service station > canopy over the gas pumps. > > > > We have an AHJ that want the canopy protected, but I can't find anything > that outlines the protection requirements for this area. My first thought > is Extra Hazard group 1. > > > > Can someone point me in the right direction > > > > > > Thank you > > > > > > James Crawford > > Phaser Fire Protection Ltd. > > Phone 604-888-0318 > > Fax 604-888-4732 > > Cel 604-790-0938 > > Email [email protected] > > > > _______________________________________________ > 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 > _______________________________________________ > 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 > _______________________________________________ > 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 > _______________________________________________ > 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 > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
