We have several CPVC antifreeze systems that we've checked with a hydrometer to
see the condition of the solution. The ranges are from a +25 to a -10 deg. F.
NFPA 13 (2010) states in Figure A.10.5.1 that the lowest one-day mean
temperature is 0 degrees for our location in sunny Texas.
The manufacturer of a solution we often use (Noble Co.) indicates their
product, GL-48, is rated at -15 degrees F. but we have no way to know what
brand or rating the solution might be in these systems we've tested.
The local fire marshal has instructed me that all of the systems are considered
"impaired" because the solution differs from the antifreeze listing temperature
(of at least the product we typically use). It is my belief if we were to
change the solution in any or all of the systems, by nightfall due to various
factors including ambient temperature change, any or all of the systems could
be back in "impairment" mode by his standards.
With my computer in the shop, I have little access to research this topic. Can
you offer me code to follow or wisdom and experience on this subject? Thank
you.
_______________________________________________
Sprinklerforum mailing list
[email protected]
http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
