American Fire Sprinkler Association
12750 Merit Drive, Suite 350 Dallas, Texas 75251
Ph: (214) 349-5965 Fax: (214) 276-0908
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TECH TALK
OCTOBER 2008
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COMPATIBILITY OF CPVC PIPE AND STEEL PIPE ANTI-MICROBIAL COATING
The compatibility issue between CPVC and steel pipe anti-microbial
coatings is being evaluated and should be resolved in the near future.
Contact the manufacturer of the CPVC pipe being used for future
directions. Lubrizol will continue to update the industry through
their FGG/BM/CZ(tm) System Compatible Program website at www.systemcompatible.com
. It is encourage that all BlazeMaster(r) pipe and fitting users to
register on that website to receive automatic email updates to any
changes in the program or review of a material's compatibility with
BlazeMaster(r) CPVC. It is important to note that FGG/BM/CZ(tm) System
Compatible Program pertains to only BlazeMaster(r) CPVC products
within the fire sprinkler industry.
DRY SPRINKLERS AND SPRAY FOAM INSULATION ALERT!
The Reliable Automatic Sprinkler Company, Inc. issued a Product
Solution Sheet for a new problem in the sprinkler industry: foam in
concealed sprinklers. They have received reports of at least three
installations where this has occurred. Spray foam insulation is being
installed on piping to prevent freeze damage. The foam will enter the
concealed sprinklers through the vent slots and prevent the sprinklers
from operating. The sprinklers should always be inspected after
installation to insure that the gap between the cover plate and the
slots in the cup are all open and free from any air flow impediments.
Any system that has had spray foam insulation installed to cover the
piping must be inspected to see if the sprinklers have been
compromised. Any sprinklers that have foam blocking the slots or
inside the sprinkler cup must be replaced.
RESTRAINT FOR GRIDDED BRANCH LINES
NFPA 13 requires restraint for branch lines where systems are required
to be protected against damage from earthquakes. Restraint is a lesser
degree of resisting loads or movement of the pipe. Restraint is
required at the ends of all branch lines indicated in section 9.3.6.3.
So, is this only applicable to tree or looped systems where a branch
line is capable of whipping around? The answer is no. Restraint also
applies to gridded systems even though there is no "end" to the branch
line since it is connected to the cross main at both ends and keeps it
from whipping around or where the branch lines could bow or flex. A
comment was made in the A2009 Report on Proposals 13-296 Log #214, for
branch lines that are 2 in. and less on gridded systems are not
required to have restraint when the length of the branch line is less
than 2 times the values indicated in Table 9.3.6.4 for the applicable
Cp value since the cross main on the gridded system will serve as a
point of restraint. The committee rejected the comment and indicated
that when the branch line length exceeds the length in Table 9.3.6.4,
regardless of the system type (tree or gridded), restraint shall be
provided. Restraint is required every 30 ft along the branch line in
the 2002 Edition and Table 9.3.6.4 in the 2007 Edition is provided for
the restraint spacing based on the pipe diameter and the seismic
coefficient.
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AFSA VIRTUAL SEMINAR
Step-by-Step Approach to Seismic Bracing
October 30, 2008
To Register: Event ID: 14089
12:00 PM EDT
11:00 AM CDT
10:00 PM MDT
9:00 AM PDT
Earn: 0.15 CEU's / 1.5 CPD's.
Member: $ 90 per connection
Non Member: $130 per connection
CEU Certificate: $ 40 per listener to receive CEU Certificate.
If any listeners at your site need CEU/CPD credit, the processing fee
is an additional $40 per person. Enter each person's full name and e-
mail address you are purchasing CEU/CPD credits for including yourself
to receive Certificate.
To Register:
Online: http://www.krm.com/afsa
By Phone: 800-775-7654, please have your credit card information ready.
By Fax: 800-676-0734. Fax completed form with Credit Card information.
By Mail: KRM Information Services Inc. PO Box 1187 Eau Claire, WI
54702-1187 (Payment must accompany registration)
FUTURE AFSA VIRTUAL SEMINAR
December 18, 2008
2008 AFSA DESIGN SCHOOLS
Beginning System Planning School
November 3-14, 2008.
Registration Prices:
Member $1100
Non-Member $1600
NOTE: Enrollment open only to AFSA Contractor Members until 6
weeks prior to each class.
NEW FIRE SPRINKLER SYSTEMS HYDRAULIC CALCULATIONS - PART 3 ON ECAMPUS!
This 2-hour interactive online course is the third in a series
covering the topic of hydraulic calculations for fire sprinkler
systems. For more information, go to the AFSA Web site, http://www.firesprinkler.org
.
Member $ 90
Non-Member $100
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TechTalk is prepared by the Technical Services Department of the
American Fire Sprinkler Association: Vice President of Engineering and
Technical Services, Roland Huggins, a PE registered in fire protection
engineering; Phill Brown, a CFPS and a NICET IV certified automatic
sprinkler technician, and Tom Wellen, a degreed fire protection-
engineering technologist. Opinions are provided with the
understanding that AFSA assumes no liability for the opinions or
actions taken on them and they are not to be considered the official
interpretation of the NFPA or that of its technical committees.
Copyright (c) 2008, American Fire Sprinkler Association, 12750 Merit
Drive, Ste 350, Dallas, TX 75251. Voice (214) 349-5965 ext 124 or
Fax (214) 276-0908. All rights reserved.
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