Fire Safety Equipment

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Importance of Fire Sprinklers

• Automatic sprinklers are widely recognized as the number one tool of fire protection • In over one hundred years of use, there has never been a multiple fatality of building occupants from fire in a building with a properly designed, installed, and maintained sprinkler system • Sprinklers respond to a fire while it is still small, preventing the fire from developing into a major threat

How reliable are sprinklers?

How reliable are sprinklers? • Records of fires in buildings with supervised automatic fire sprinkler systems have indicated successful extinguishment or control in more than 99% of fire incidents. No other fire protection system or feature has a comparable record of reliability. • Most fires are contained by one or two sprinklers.

What about water damage?

• Because sprinklers attack the fire while it is still small, the total amount of water needed for fire suppression is small (often less than 50 gallons per minute) • Without sprinkler protection, a fire is permitted to grow and the fire department will typically apply hundreds of gallons of water per minute during their operations • For this reason, total amounts of water used in sprinklered buildings approximate one-tenth the amounts used for fires in nonsprinklered buildings
• The likelihood of a sprinkler discharging water in the absence of a fire is very small • Each model of sprinkler is subjected to rigorous laboratory tests to guarantee long-term integrity, and every single sprinkler is hydrostatically tested at twice the maximum system water pressure prior to leaving the factory • Sprinkler guards should be used in environments where sprinklers could be damaged Aren’t Sprinkler Systems Expensive? • No, in fact sprinklers can often reduce the total cost of construction • Typically, sprinkler systems can be installed for about 1% of building cost, or less than $2 per square foot • If the decision to install sprinklers is made early enough in the planning process, sprinklers can actually reduce total construction costs through the use of code incentives or “trade-ups” Aren’t Sprinkler System

Expensive?

• In recognition of the superior fire protection afforded by sprinklers, codes permit reductions in fire resistance ratings, longer exit travel distances, and a wider range of interior finish materials in sprinklered buildings • Insurance rates are substantially less for sprinklered facilities • These incentives make it possible to build a safer building for less money The best fire protection system is… …the one that works when it’s needed.

Sprinkler System Components

• Basic components: – Sprinklers – System piping – A dependable water source – Most systems also require an alarm and system control valves Sprinkler Head Components • The typical sprinkler consists of a frame, thermal operated linkage, cap, orifice, and deflector • Styles of each component may vary but the basic principles of each remain the same Sprinkler Head Components • Frame – The frame provides the main structural component which holds the sprinkler together. – The water supply pipe connects to the sprinkler at the base of the frame – The frame holds the thermal linkage and cap in place, and supports the deflector during discharge Sprinkler Head Components • Thermal linkage – The thermal linkage is the component which controls water release – Under normal conditions the linkage holds the cap in place and prevents water flow – Common linkage styles include soldered metal levers, frangible glass bulbs, and solder pellets Sprinkler Head Components • Cap – The cap provides the water tight seal which is located over the sprinkler orifice. – This component is held in place by the thermal linkage – Operation of the linkage causes the cap to fall from position and permit water flow Sprinkler Head Components • Orifice – A machined opening at the base of the sprinkler frame – It is from this opening which extinguishing water flows • Deflector – The deflector is mounted on the frame opposite the orifice – The purpose of this component is to break up the water stream discharging from the orifice into a more efficient extinguishing pattern – Deflector styles determine how the sprinkler is mounted

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