All - Hold on. NFPA 13 *does not* state 40F or less you must protect the equipment,
Specifically - NFPA 13 -2022 states: 16.4.1.1* <https://link.nfpa.org/publications/13/2022/annexes/A/groups/16#ID000130005723> - Where any portion of a system is subject to freezing and the temperatures cannot be reliably maintained at or above 40°F (4°C), the system shall be installed as a dry pipe or preaction system. Where any portion of a system is subject to freezing *AND *the temperatures cannot be reliably maintained at or above 40°F (4°C), the system shall be installed as a dry pipe or preaction system. The "AND" is important. I have personally designed and installed numerous wet systems where the area is maintained at our above freezing temperatures. These have been large cooler boxes housing critical items that could not be subject to freezing. or they will be destroyed. A layout technician has to be smart on where the small diameter piping is located so freezing does not occur. It can be done. I have never had a freeze occur in the cooler boxes I have completed. Keep in mind - dry systems, dry sprinklers, and other schemes are not inexpensive and in many cases, are more complicated and maybe less reliable. In most cases, a wet pipe system will almost always outperform a dry system. *The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that the AFSA assumes no liability for this opinion or actions taken on it and they are not to be considered the official position of the **AFSA, and/or NFPA or its technical committees.**AFSA cannot provide design or consulting engineering services, and this opinion should therefore not be considered, nor relied upon, as such.* Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org Adventure Awaits at AFSA43 55 Technical Sessions… 70+ Training Hours… Sold-Out Exhibit Hall! There’s still time to register online and join us in Denver. Click here <https://firesprinkler.swoogo.com/AFSA43live/> to view the schedule and register for AFSA43: Convention, Exhibition, and Apprentice Competition at the Gaylord Rockies in Denver September 18-21, 2024. On Fri, Aug 23, 2024 at 12:35 PM Brett Peters <br...@proudline.ca> wrote: > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > sprinklerforum-le...@lists.firesprinkler.org > 0C is actually 32F and NFPA states that temperature must be > maintained above 5C or 40F for wet systems. > So if the temperature is only maintained at 2C or 36F then dry barrel > sprinklers would be required. > > > > > Thanks > > > > Brett Peters > General Manager Installation & Design > Proudline Fire Protection Services Ltd. > br...@proudline.ca > 780 490 7602 office ext 202 > 780 490 7605 fax > 780 777 0568 cell > 780 718 2676 24h > Visit us at www.proudline.ca > > Proudline now offers ULc listed monitoring services, please contact > a...@proudline.ca for more information > > > > > > > On Thu, Aug 22, 2024 at 2:04 PM Daniel Bobadilla < > danielbobadil...@gmail.com> wrote: > >> Hello fellows, hoping you're doing well. >> >> I would like to know, based on your experience, what is the value you >> consider as a limit to specify dry barrel sprinklers into a cooler. >> >> Pure water freezes at 0°C (40°F), but in a cooler that is supposed to >> work in the range of 2°C to 8°C (36°F to 47°F) is it necessary to install >> dry barrel sprinklers? >> >> NFPA 13 indicates 40°F the starting temperature in this table: >> >> [image: image.png] >> >> The minimum exposed barrel is 0 inches for all the exterior temperatures >> when the protected area is 40°F. The actual exterior temperature is >> about 87°F. >> >> If there is no need for exposed barrel length, is this sufficient to >> assume that a standard wet sprinkler is appropriate? >> >> I would like to know your thoughts on this! >> >> Have a nice day! >> >> >> >> -- >> =?Este mensaje se dirige exclusivamente a su destinatario y puede >> contener información privilegiada o confidencial. Si no es Ud. el >> destinatario indicado, queda notificado de que la utilización, divulgación >> y/o copia sin autorización está prohibida en virtud de la legislación >> vigente. Si ha recibido este mensaje por error, le rogamos que nos lo >> comunique inmediatamente por esta misma vía y proceda a su destrucción. >> >> >> This message is intended exclusively for its addressee and may contain >> information that is confidential and protected by professional privilege. >> If you are not the intended recipient you are hereby notified that any >> dissemination, copy or disclosure of this communication is strictly >> prohibited by law. If this message has been received in error, please >> notify us immediately via e-mail and delete it. >> >> _________________________________________________________ >> SprinklerForum mailing list: >> >> https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org >> To unsubscribe send an email to >> sprinklerforum-le...@lists.firesprinkler.org > >
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