FIRE HYDRANT
Fire Hydrant and Sprinkler System are considered to be the most effective and economical way to apply water from fixed systems. It is designed to act upon a fire at a pre-determined temperature by means of a water spray. It could extinguish the fire or control its spread. The extinguishing mechanism of sprinkler water spray includes combustible materials to prevent further fire spread and displacement of combustible vapour and oxygen steam.
The sensitivity of the sprinkler heat is dependent on the nominal rating of its glass bulb, which varies from 570° oC - 260° oC and is identified by different colour codes. When considering the increase of the compartment size, or the reduction in passive fire protection systems by using sprinkler systems, the sprinkler system should meet the relevant recommendations by commonly used standards such as BS 5306 : part 2, i.e., The relevant occupancy rating together with the additional requirements for life safety.
The sensitivity of the sprinkler heat is dependent on the nominal rating of its glass bulb, which varies from 570° oC - 260° oC and is identified by different colour codes. When considering the increase of the compartment size, or the reduction in passive fire protection systems by using sprinkler systems, the sprinkler system should meet the relevant recommendations by commonly used standards such as BS 5306 : part 2, i.e., The relevant occupancy rating together with the additional requirements for life safety.
There are four main types of sprinkler systems - wet, dry, alternate and pre-action system. They are normally chosen by the nature of the area to
be protected, whether storage of water in the pipework would pose a risk due to process or weather condition, or where the risk of accidental
discharge is to be eliminated.
Fire Hydrants Or hydrant outlets, are installed within the building to enable firefighters to connect their hoses to a water supply to fight.
Fire hydrants may be of the dry type which are empty in normal situations, but are charged with water supplied through fire brigade's pumping
appliance to the inlet at ground level in the building perimeter during emergency. Alternatively, they may be kept full of water and supplied
from tanks and pumps in the building. Normally, the wet fire hydrants are also coupled with fire service inlets. These are located at the perimeter
of the building to enable water from the external source to be fed into the building via the fire brigade's pumping alliance. Building height
generally determines which type is used.
It is also important in the planning stage to ensure that an external source of water supply. Such as street hydrants, is within reasonable
distance from the building. The fire service should not have to travel far form an external water source.
