I am a fire sprinkler fitter a military installation. Have a question regarding low expansion foam systems with the use of Viking Grate nozzles.
Of course with the concerns of AFFF, there are many issues and decisions flying around about the existing systems we have out here in our aircraft hangars.
Is it acceptable to use the Viking grate nozzles without the low expansion foam?
How does this provide any fire protection?
Obviously, this is not how the system was designed, in my opinion.
Please help me understand how this can be acceptable. I appreciate any and all input.
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12/9/2022 08:09:51 am
IMO, the use of the grate nozzles w/o the use of an appropriate foam media is not acceptable.
12/9/2022 08:18:01 am
To my knowledge, these are only listed with the low expansion foams, and specific ones only. Even if it were listed with just water, does the hazard allow for a water application? Sounds like it's a temp fix, at best, to remove the PFAS based foam.
12/9/2022 08:45:08 am
As Dan said, there is a LOT of issues with the new foam listing and coming up with compatible devices. From my understanding there is not a fully listed system when it comes to sprinklers, monitors, and nozzles. It gets very complicated very quickly. Be cautious of anyone saying they have a fully listed solution, especially when replacing AFFF into an existing setup.
12/9/2022 09:09:28 am
In our world, its all about the listing.The Viking Grate nozzles are listed for use with AFFF. They don't have a listing for use with any other additive.
12/12/2022 09:12:47 am
Look on page 5. Viking has a nice chart per systems and approvals listed. Viking Grate nozzles are FM listed for use with USP foam. Have a good day.
1/16/2023 09:44:08 am
Are preaction/open head/ deluge systems an option for aircraft hangars?
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