10/05/2022
Fire sprinkler types
They are four main types of fire sprinkler system
wet pipe
Dry Pipe
Deluge
Pre-action
In a wet pipe fire sprinkler system, the most common type in residential buildings, Cold water is stored under pressure in the pipes and is realised immediately by sprinkler heads when the predetermined heat level is reached.
Dry pipe sprinkler system takes slightly longer to activate and are used in unheated/unoccupied buildings where pipes may freeze and burst. Nitrogen gas or pressurised air is stored in the pipes, connected to a water storage tank or main . On activation by a fire, the air leaks out of the pipes, causing the water to flow through the pipes to the sprinkler heads.
Deluge Sprinkler systems are typically used in areas where rapid fire damage is major concern, such as warehouse loading bays and high-rise buildings. In these systems, the nozzle is always open. They are triggered by an alarm that opens a water release valve.
Pre-action sprinkler systems are a combination of wet and dry pipes systems, typically used in areas at high-risk of water damage. Water is not stored in the pipes until a fire is detected, when the water is realised to the sprinkler heads. The response time is as fast as a standard wet pipe sprinkler system. Automatic fire🔥 sprinkler systems are also available and are effective in large areas such as offices and shopping centre.
