Dry Pipe Fire Sprinkler System
A dry pipe system is optimal for fire sprinkler protection when ambient temperatures reach freezing, rendering a wet pipe fire sprinkler system inoperable. The dry pipe system is the second most common system to be installed and is often used in structures that do not have adequate heating, such as garages, and storage facilities.
The dry pipe fire sprinkler system is a network of pipes, alarms, control valves, and fire sprinkler heads. The dry pipe systems pipes are not filled with water until one of the automatic fire sprinkler heads attached to the system opens after reaching a set temperature. This forces a change in air pressure in the system allowing water to fill all the pipes, and for all the automatic fire sprinkler heads to open extinguishing the fire.
NFPA 13D has created a standard for the installation of fire sprinkler systems, detailing information for the combined dry pipe and pre action system. “1.1* Scope. 1.1.1 This standard shall cover the design, installation, and maintenance of automatic sprinkler systems for protection against the fire hazards in one- and two-family dwellings and manufactured homes. 1.1.2 This standard assumes that the sprinkler system is designed to protect against a fire originating from a single ignition location.”