
Pipe
Fabricated for
Sprinkler System
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Selection of Fire Sprinkler Pipe Materials
Sprinkler water is transported to fire via a system of fixed
pipes and fittings. Piping material options include various
steel alloys, copper, and fire resistant plastics. Steel is
the traditional material with copper and plastics utilized
in many sensitive applications.
Primary considerations for selection of pipe materials include:
• Ease of installation -
The easier the material is installed, the less disruption is
imposed on the institution's operations and mission. The
ability to install a system with the least amount of disturbance
is an important consideration, especially in sprinkler retrofit
applications where building use will continue during construction.
• Cost
of material versus cost of protected area -
Piping typically represents the greatest single cost item in
a sprinkler system. Often there is a temptation to reduce
costs by utilizing less expensive piping materials which
may be perfectly acceptable in certain instances, i.e. office
or commercial environs. However, in museum applications where
the value of contents may be far beyond sprinkler costs,
appropriateness of the piping should be the deciding factor.
• Contractor
familiarity with materials -
A mistake to be avoided is one in which the contractor and
pipe materials have been selected, only to find out that
the contractor is inexperienced with the pipe. This can lead
to installation difficulties, added expense, and increased
failure potential. A contractor must demonstrate familiarity
with the desired material before selection. •
Prefabrication
requirements or other installation constraints -
In some instances requirements may
be imposed to limit the amount of work time in the space.
This will often require extensive prefabrication work outside
of the work area. Some materials are easily adapted to
prefabrication.
• Material cleanliness -
Some pipe materials are cleaner to install than others. Various
materials are also resistant to accumulation in the system water. Cleanliness
of installation and discharge should be a consideration.
• Labor requirements -
Some pipe materials are heavier or more cumbersome to work
with than others. Consequently additional workers are needed
to install pipes which can add to installation costs. If
the number of construction workers allowed into the building
is a factor, lighter materials may be beneficial.
Material |
Advantages |
Disadvantages |
Steel |
• Relative ease of installation
• High degree of contractor familiarity
• Most readily available |
• Weight
• Installation cleanliness
• Requires regular flushing to maintain water
cleanliness |
| |
Copper |
• Light
weight
• Easily prefabricated
• Relatively clean installation |
• Material
cost, especially fittings
• Fewer contractors are familiar with copper installation
techniques
• Flame brazed joints are the most durable.
Special care must be exercised to minimize fire risks
associated with
installation. |
| |
Plastic |
• Light
weight
• Very easy to install without specialized tools or process
• Resistant to water corrosion
• Highest water flow coefficients, often allowing smaller
diameter pipes.
• Generally flexible to install |
• Material
cost
• Their use is not permitted in all occupancy types
• They may not be used for dry-pipe or preaction systems. |
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Fire Sprinkler Systems
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