American Fire Sprinkler Association [http://www.firesprinkler.org/]
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AFSA Technical Update
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A newsletter dealing with codes and other technical issues

May 16, 2013
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Internal Pipe Inspections of Antifreeze Subsystems

"NFPA 25 indicates in Section 14.2.2 that during a 5-year obstruction 
investigation,
every other system can be inspected.  Does this include antifreeze systems?  My 
example is a school that has two wet systems and 13 antifreeze systems.  This 
indicates
that only one of the actual wet systems needs to be internally inspected.  Is it
 the intent of Section 14.2.2 that we would need to internally inspect 7 of the 
13 antifreeze systems?  In addition, antifreeze systems have check valves.  Are 
the check valves to be internally inspected every 5 years even if they have the 
3/16-inch hole drilled in them?"

We have reviewed NFPA 25, 2011 edition as the applicable standard. Our informal 
interpretation is that every other system shall have an internal inspection of 
piping
every 5 years in buildings having multiple wet pipe systems.

Since this application has two wet system risers, the antifreeze systems in 
question
are subsystems of the two wet system risers. As such, each antifreeze subsystem 
is not required to have an internal pipe inspection. If the antifreeze systems 
were
stand-alone system risers, then internal inspection requirements by 14.2.1 would
 be applicable. The Handbook commentary indicates that the inspection required 
by
14.2.1 should be coordinated with the internal inspection requirement of system 
control valves, such as required by 14.4.1.2 for alarm valves. Section 14.2.1 is
 not intended to place an additional burden on the property owner by requiring 
an
additional inspection every five years. If the system is drained for another 
5-year
inspection, then the internal inspection of that particular system should be 
completed.
If not, then the system should not be drained just for the internal inspection. 
This would also apply to multiple systems on manifolds. Section 14.2.2 indicates
 that buildings having multiple wet pipe systems, every other system shall have 
an internal inspection of piping every 5 years as described in Section 14.2.1. 
During
the next inspection frequency required by 14.2.1, the alternate systems not 
inspected
during the previous inspection shall have an internal inspection of piping 
according
to Section 14.2.2.1. An alternative to opening the system is using 
nondestructive
examinations allowed by Section 14.3.2.3 where ultrasound, x-rays, and remote 
video
cameras can be used. Once again, this is if the system is drained for another 
5-year
inspection such as for the check valves. Section 14.2.2 does not absolve the 
adjacent
riser from other inspection, maintenance, and testing requirements of NFPA 25 
such
as check valves. Although the check valve has a 3/16-inch hole drilled in the 
clapper,
the check valves are still required to be inspected per NFPA 25 to verify the 
check
valve didn't have a total failure. In addition, the requirements of Section 
5.3.4
for antifreeze systems and fluids that were recently modified by TIA's would 
still
apply.
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NFPA 13 Public Inputs Due May 31st
NFPA is soliciting input for the 2016 edition of the NFPA 13 standards. The 
proposals
can be submitted using a Word document form or online.
NFPA 13 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13] - 
Standard
for the Installation of Sprinkler Systems
NFPA 13D [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13D] - 
Standard
for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and 
Manufactured
Homes
NFPA 13R [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=13R] - 
Standard
for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies
NFPA 24 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=24] - 
Standard
for the Installation of Private Fire Service Mains
Other standards accepting public inputs with later due dates:
NFPA 14 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=14] - 
Standard
for the Installation of Standpipe and Hose Systems
NFPA 15 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=15] - 
Standard
for Water Spray Fixed Systems for Fire Protection
NFPA 20 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=20] - 
Standard
for the Installation of Stationary Pumps for Fire Protection
NFPA 291 [http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=291]   
Recommended
Practice for Fire Flow Testing and Marking of Hydrants
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Hosted by the American Fire Sprinkler Association
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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 PE registered
 in fire protection engineering. 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 2012, American Fire Sprinkler Association.
All Rights Reserved
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Training Webinar
Bob Caputo
to Present an
AFSA Webinar on
"Technical Changes from the 2010 ed. to the 2013 ed. of NFPA 13
Part 3 - "Residential Sprinkler Requirements"
Wed., May 29, 2013
Free to AFSA members!
Register Button 
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Training Calendar
AFSA Beginning
Fire Sprinkler System
Planning School
July 29 - August 9, 2013

Check our calendar to view upcoming training.

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