Quantcast Automatic Dry-Pipe Sprinkler Systems

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(Refer to NAVFAC Guide Specification NFGS-15502 for further information
in developing detailed specifications)
GENERAL INFORMATION:  A dry-pipe sprinkler system is used where
buildings are unheated and water in piping would freeze. The sprinkler
piping contains air under pressure, which holds back the water at a dry
pipe valve in a heated location.  When a sprinkler head activates, the
air in the piping is released and the drop in air pressure trips the
dry pipe valve and admits water to the system piping with discharge
from any activated sprinkler head.
REQUIREMENTS:  Due to the climatic conditions, dry pipe sprinkler
systems are not normally installed in the Pacific area, except for
their installation in large cold storage facilities. The
PACNAVFACENGCOM Fire Protection Engineer will determine requirements
for dry pipe sprinkler systems upon project submittal.
GENERAL:  The work includes complete design, the furnishing of all
materials, equipment and labor for the installation of dry-pipe
sprinkler system, complete and ready for standard operation in areas
SPECIFIC REQUIREMENTS:  The system shall include a sprinkler riser
connected to the water system, water flow indication and appurtenances,
sprinkler heads and piping, and such other standard accessories as are
necessary for a complete, approved system.  The design and installation
shall be accomplished by a qualified, responsible contractor recognized
as a fully-experienced specialist in automatic sprinkler systems. All
devices and equipment shall be of make and type listed by the
Underwriters' Laboratories, Inc., or approved by the Factory Mutual
Laboratories.  Materials shall be of approved, standard quality, and
the entire installation shall be accomplished in a thorough and
workmanlike manner.  Sprinkler heads shall be spaced according to
National Fire Protection Association Standards. All work and materials
shall conform with current requirements of the NFPA as published in
their Standards Nos. 13, 15, and 25, latest editions. The provisions
of these standards, unless othervise specified, shall be followed in
total, whether the stipulations listed therein are directed or
recommended.  The riser assemblies and trimmings shall be installed
approximately at the locations indicated.  Detailed working drawings of
the system and catalog information shall be prepared by an accredited
sprinkler installation company and shall be submitted to the
Contracting Officer for review and approval of the CQC representative


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