| CLASSIFICATION | MAXIMUM CEILING TEMPERATURE | SPRINKLER ACTIVATION TEMPERATURE | GLASS BULB COLOR | FUSIBLE LINK COLOR |
|---|---|---|---|---|
| Ordinary | 100°F | 135°F - 170°F | Orange (135°F) Red (155°F) | black; no color |
| Intermediate | 150°F | 175°F - 225°F | Yellow (175°F) Green (200°F) | White |
| High | 225°F | 250°F-300°F | Blue | Blue |
| Extra High | 300°F | 325°F - 375°F | Purple | Red |
| Very Extra High | 375°F | 400°F - 475°F | Black | Green |
| Ultra High | 475°F | 500°F - 575°F | Black | Orange |
| Ultra High | 625°F | 650°F | Black | Orange |
| OCCUPANCY HAZARD | SQUARE FOOT PER HEAD | MAXIMUM SPACING BETWEEN SPRINKLERS |
|---|---|---|
| Light Hazard (Office, Educational, Religious, Institutional, Hospitals, Restaurants, Clubs, Theaters, etc.) | 130-200 SF per head (based on obstructions and flow calcs) | 15 ft |
| Ordinary Hazard (Mills, Manufacturing, Processing, Machine Shops, Repair Garages, Post Offices, Bakeries, Wood Machining and Assembly, Auto Parking, etc.) | 130 SF per head | 15 ft |
| Extra Hazard (Plastic Processing, Chemical Spraying, Metal Extruding, Printing, Varnishing, Painting, etc.) | 90-130 SF per head (based on obstructions and flow calcs) | 12 ft |
In a building, fire hydrant system is a measure of safety in cases of emergency or required equipment in some of the buildings, which includes a set of components that when assembled together to provide a source of water to help the fire authorities in the fire.
Put another way, a fire hydrant system is the water supply with sufficient pressure and flow delivered through pipes throughout the building strategically located network of valves for the purposes of fire-fighting.
Shooting HydrantIn some circumstances, the water from the fire hydrant network system can also be shared with other safety measures such as automatic fire sprinkler systems or fire hose reels.
In Australia, and the law of the construction of Australia (BCA) mind-sets to satisfy (DTS) provisions for the fire hydrant system required in the buildings to the degree necessary to facilitate the needs of the Fire's.
Fire-fighting operations. And
To an area of the building. And
The dangers of fire.
The fire hydrant design and install systems in accordance with Australian Standard AS2419 and consists of the following basic components:
Water supply and storage
Pipes, valves
Fire Brigade Booster
Pumpset
Faucet, faucet valve or landing Valve & Coupling
Layflat fire hose
Block plan
When the fire hydrant system design must be satisfied that the specific performance targets. These performance targets require hydraulic analysis to prove the existence of sufficient water pressure and flow to the most disadvantaged hydraulically faucet. Pressure and flow requirements vary according to the classification of the building, floor area and the protection of spraying.
In rack sprinkler system
Warehouse fires are very difficult; spread quickly and be huge increases in the shooting rate in a short period of time. This is especially true when it comes to fire commodities such as flammable liquids, paper, and plastic materials at risk. Rack is designed in fire sprinkler systems designed to protect storage areas ridden in warehouses.
In rack and machine-gun fire does not prevent the fire from starting, in fact it depends on the heat from the fire to move them, but it will not help contain the fire in a certain area, and put it out. This in turn reduces the losses caused by the fires and reduce the risk to life from fire.
When ESFR sprinkler systems and eliminate the need to sometimes machine guns in the rack, storage configurations or certain types of construction of buildings will not allow the use of sprinklers ESFR. Usually when storing combustible materials non-combustible or regular exceed 40 feet in height or building exceeds 45 feet in height ESFR sprinklers can not be used as a protection scheme. In the rack and then it can be used machine guns to provide a suitable solution for the protection of way. This arrangement includes the installation of sprinklers installed on a network of pipes inside the storage rack structure. In some cases, this has allowed the installation of rack structures in high-rise buildings such as 100 feet where the building's roof rack support structure itself. In rack sprinklers are used on a large scale in structures that use automated rack use automated picking equipment is computer controlled to store and retrieve pallet quantities of material.
In rack sprinklers provide additional protection within the rack structures with the spacing which can be between 10 and 25 feet vertically between different lines of machine guns. Because there are more sprinklers installed within the rack structure and were relatively close together vertically there is low demand for water to run this machine guns then required by typical ESFR sprinkler. A typical rack will spray in exchange for working on 30gpm 100gpm discharged from the spraying ESFR. Sprinklers in the holder may not allow for the same flexibility in the storage rack configurations that provide sprinklers ESFR but it does not allow for the further rise of the store and then ESFR sprinklers which can be important in view of the volume of printing the foot of the building.
Dry fire sprinkler system pipes
Dry pipe sprinkler system, which is filled with pipes with compressed air or nitrogen instead of water. This air carries the remote valve, known as a dry pipe valve, in the closed position. Located in the hot, dry pipe valve area, and prevents water from entering the tube even cause a fire one or more of the sprinklers to work. When this happens, the air escapes and releases the dry pipe valve. The water then enters the tube, flowing through the machine guns open fire.
The advantages of using dry pipe fire sprinkler systems include:
Spray dry automatic protection piping systems in places where freezing availability possible. Typical installations include dry pipe and the upper rooms of unheated warehouses, loading docks exposed outside and inside commercial freezers.
Many people look dry pipe sprinklers is useful to protect groups and other sensitive water areas. This benefit is seen due to the fear that wet pipe system physically damaged will leak while the dry pipe systems do not. In these cases, however, the dry pipe systems generally will not provide any advantage over wet pipe systems. Must affect damage occurs, there will be only a mild discharge delay, any 1 minute, while the release of the air in the pipes before the water flow.
The disadvantages of the use of fire sprinkler systems dry pipe include:
Increasing complexity - dry pipe systems require additional control equipment and components supply air pressure which increases the complexity of the system. Without proper maintenance of this equipment may be less reliable than comparable wet pipe system.
Installation and maintenance costs rise - effects added complexity and cost of the overall dry pipe installation. This complexity also increases maintenance expenses, mainly due to labor costs added services.
The flexibility of the design world - and there are strict requirements with respect to the maximum allowable size (usually 750 gallons) of individual dry pipe systems. These restrictions may affect the ability of the owner to make additions system.
Increase fire response - up to 60 seconds may pass from the time of spraying open until the disposal of water on the fire. This delay needed to fire procedures, which may cause an increase in content damage.
Increase the likelihood of erosion - and after the operation, the dry sprinkler pipes must be drained and completely dried systems. Otherwise the remaining water may cause erosion of the pipe and the failure of a previous premature. This is not a problem with wet pipe systems where the water is maintained constantly in the pipe.
With the exception of building spaces and unheated rooms freezing, dry pipe systems do not provide any significant advantages over wet pipe systems.
