nfpa基本消防及生命安全規(guī)范架構(gòu)(編輯修改稿)
2025-03-31 15:04 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 aintenance are crucial ? Unfortunately, some problems may be identified after the previous three have been pleted Equipment Installation Maintenance Design Slide 20 Fire Suppression ? Water Based Suppression ? Clean Agent Systems ? Fire Extinguishers Slide 21 Water Based Suppression ?WetPipe – System contains water under pressure at all times – Series of closed sprinkler heads – Heat activates sprinkler head – Water is discharged immediately * Not remended if system could be exposed to temperatures below 40186。F Slide 22 WetPipe System 1. Main valve 2. Alarm check valve 3. Fire department check valve 4. Fire department connection 5. Water motor alarm 6. Sprinkler head 7. Inspector’s test valve Slide 23 WetPipe System ?Only the sprinkler heads heated by the fire activate ?Fire sprinklers spray 18 gallons of water per minute Sprinkler head As temperature rises the bulb will shatter Water is released and deflected in a spray pattern Slide 24 Sprinkler Color Codes and Ratings Color Sprinkler Classification Temperature Rating Red Ordinary 135170 Yellow/Green Intermediate 175225 Blue High 250300 Purple Extra High 325375 Black Ultra High 500575 Slide 25 Field Method for Temporary Stoppage of Sprinkler Head Slide 26 DryPipe System ?System contains air under pressure – Compressor on system keeps pressure up ?Sprinkler heads hold the pressure ?A drypipe valve holds back the water supply ?Valve opens when pressure falls below a predetermined level ?Sprinkler head activation – pressure drop – valve opens – water sent to all heads – water discharged from activated sprinkler head(s) * Remended for areas that could experience freezing temperatures Slide 27 How do DryPipe Systems Work? 1. Heat Activated 2. Pressure Drop 5. Water Discharges from activated head 4. Water sent to all sprinkler heads 3. Valve Opens Slide 28 DryPipe System 1. Supply check valve 2. Main valve 3. Dry pipe valve 4. Fire department check valve 5. Fire department connection 6. Water motor alarm 7. Sprinkler head 8. Inspector’s test valve Slide 29 Preaction System ?System contains air under pressure – Compressor on system keeps pressure up ?Water held back by preaction valve ?System equipped with supplemental detection ?Operation of detection system allows preaction valve to open and water fills the system ?Water not discharged until fire has generated
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