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From: American Fire Sprinkler Association
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Date: March 14, 2011 2:55:52 PM PDT
To: [email protected]
Subject: AFSA Technical Alert 2011-3-14
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AFSA Technical Alert
A newsletter dealing with codes and other technical
issues March 14, 2011
Update on Antifreeze Systems
NFPA has issued new TIA's 10-2 regarding the use of antifreeze for
NFPA 13D / 13R / 13 and TIA 11-1 for NFPA 25, all of which have an
effective date of March 21, 2011.
The 10-2 TIAs replace the Aug 2010 TIA's 10-1, which imposed a
moratorium on the use of antifreeze in dwelling units. The 10-2
TIA's include two major changes.
(1) Antifreeze compounds are allowed in new sprinkler systems with
the following conditions:
- Only glycerin and propylene glycol can be used
Glycerin can be up to 48% by volume
Propylene glycol can be up to 38% by volume
- Only factory premixed solutions can be used
These concentrations provide freeze protection levels down to
approximately -16°F for glycerin and
-3°F for propylene glycol.
(2) These changes apply to all installations and not just those in
dwelling units.
Additionally, a TIA on NFPA 25 (TIA 11-1) was released that places
similar restrictions on the use of antifreeze in existing systems.
If the system meets the following two conditions, when tested at
multiple locations, it can remain in use. (1) The antifreeze
compound can be positively identified and is either glycerin or
propylene glycol. (2) The concentration does not exceed 50% by
volume for glycerin and 40% by volume for propylene glycol and does
not require modification.
If for any reason the solution must be replaced or modified, then
one must drain the system and use factory premixed solutions at the
48% and 38% maximum concentrations, respectively.
The new TIA's as well as the Standards Council decision can be found
on the NFPA's website on their document pages at:
NFPA 13: www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13
NFPA 13R: www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13R
NFPA 13D: www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13D
NFPA 25: www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=25
Watch for upcoming additional details from AFSA.
Technical Update is prepared by the Technical Services Dept. of the
AFSA: Vice President of Engineering and Technical Services Roland
Huggins, a PE registered in fire protection engineering; Phill
Brown, a NICET IV certified automatic sprinkler technician and NFPA
Certified Fire Protection Specialist (CFPS) and Tom Wellen, a
degreed fire protection engineering technologist. 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 NFPA or its technical committees.
Copyright 2011, American Fire Sprinkler Association.
All Rights Reserved
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