Document vjD1krK0ekknbb9bp534JNYb

Fire Extinguishment and Control TABLE 36-A STANDARD TEMPERATURE RATINGS FOR AUTOMATIC SPRINKLERS Anting Ordinary Intermediate High Extra high Very extra high Ultra high Operating temperature (F) 135-170 175-225 250-300 325-375 400-475 500-575 Color Uncolored* White* Blue Red Green Orange Maximum ceiltng temperature (F) 100 150 225 300 375 475 From Spnnkler Systems, NFPA Standard No 13, Table 3651 'The 135 F sprinklers of some manufacturers are half black and half uncolored The 175 F spnnklers of the same manu facturers are yellow s used where construction is inadequately protected by design or by distance from ad jacent fire hazards In special applications, open spnnklers and closed spnnklers may be combined in a single system where deluge protection is not needed over the entire area However, it must be remembered that separate auto matic detectors are also required in the area covered by the closed spnnklers, that opera tion of a closed spnnkler will not activate the entire system, and that a fire in the area of the closed spnnkler will also cause water to discharge from all of the open spnnklers Automatic alarms, operated by the flow of water through the system, should be a part of every standard spnnkler installation Such an alarm may be connected to a centralstation fire alarm service or to the municipal fire department, or may be a local alarm signal Its purpose is to give prompt notice that the TABLE 36-B RECOMMENDED RATINGS FOR SPRINKLERS Maximum temperature (F) at spnnkler level under other than fire conditions 100 150 225 300 365 465 Low rate of heat release from fire (Light occupanctes such as offices, schools, hotels, hospitals, apartments) 135-170 175-225 250-300 325-375 400--475 500-575 Moderate rate of heat release from fire (Ordinary industrial occupancies) 175-225 175-225 250-300 325-375 400-475 500-575 High rate of heat release from fire (Flammable liquids, rubber tires rub ber and plastic foams, high-piled com bustible storage and similar locations) 250-300 250-300 250-300 325-375 400-475 500-575 Courtesy Factory Mutual Engineering Corporation 1082