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Dry & Wet Riser Systems
This document provides information on wet and dry riser firefighting systems, including design criteria, requirements, and system components. It discusses factors like building height and area that determine the number and size of rising mains. Key elements of wet riser systems are described such as breeching inlets, landing valves, air release valves, pump configurations, and tank capacities. Requirements for submission to authorities are also covered.
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Dry & Wet Riser Systems
- 1. DRY & WETDRY& WET RISERRISER SYSTEMSSYSTEMS
- 2. Who to decideon the nos. of wet riser main/ Dry riser system to be installed ? • Architect Where to locate the wet/dry riser ? • To be decided by Architect
- 3. Design Criteria Numbers ofrising mains depend on : • Each rising main serves not more than 930m2 of floor area • Cover a distance of 38m from a landing valve
- 4. The riser andlanding valves shall be housed in: • A protected area or lobby or shaft
- 5. Where to locatethe breeching inlet Design Criteria Breeching inlet shall be less than 18m from the fire engine hard standing Conspicuous position and accessible to the fireman
- 6. TYPE OF THESYSTEMTYPE OF THE SYSTEM LANDINGLANDING VALVEVALVE Dry Riser SystemDry Riser System BREECHING INLETBREECHING INLET AIRAIR RELEASEDVALVERELEASEDVALVE
- 7. Requirement of dryriser installation • For residential building height more than 45m but less than 60m, or with basement or commercial building • Ø100mm dry riser main pipe is for building height from 10m to 45m • Ø150mm dry riser main pipe is for building height from 45m to 60m
- 8. Requirement of dryriser installation •2- way breeching inlet for Ø100mm rising main •4- way breeching inlet for Ø 150mm rising main
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- 11. Air Release valve HandWheel Landing Valve Anti-Thief Device
- 12. FSSB SUBMISSION ISNOT REQUIREDFSSB SUBMISSION IS NOT REQUIRED LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION Submission
- 15. ConventionalConventional PUMP FEED GRAVITY FEED TRANSFERPUMP WET RISER PUMPS JOCKEY PUMP FROM PUB SUPPLY 4 WAY BREECHING INLET LANDING VALVE
- 16. Old designOld design •Non conventional - phase out FROM PUB SUPPLY AIR RELEASE VALVE LANDING VALVE DOMESTIC FEED Tanks WET RISER PUMP 4 WAY BREECHING INLET WET RISER TANK
- 17. Down Comer SystemDownComer System DOMESTIC 21 ST STOREY 25TH STOREY BREECHING INLET Ø100mm GI PIPE 1ST STOREY Between 60m to 70 m WET RISER Phase out for New Building (17 Sep’01)
- 18. Transfer Water TankDesign • One rising main = 11.5 m3 (15min) @ 27 l/s • Two rising main = 23 m3 (15min) @ 38 l/s
- 19. Roof top wetriser tank layoutRoof top wet riser tank layout DIA 3.62 1m 1m 2m 3m length for pump set 1m Ring tanks 3-Rings Tank 3 nos. = 49 m3 5 nos. =75 m3 ACOUSTIC SOUND INSULATION 3 1 12m 7m 4-Rings Tank 2 nos. = 49 m3 3 nos. =75 m3
- 20. Wet riser tankcapacity • One rising main capacity = 49 m3 for half hours + 1.1 m3 fire hose reel • Two rising main capacity =74 m3 for half hours +1.1 m3 fire hose reel
- 21. Building Above 120mBuildingAbove 120m FROM PUB SUPPLY 1ST STOREY Mid-Storey Roof Storey WET RISER PUMP HOSEREEL PUMPTRANSFER PUMP Down feed Down feed Transfer tanks
- 22. Power required • PUBsupply • Generator - supply to 4 blocks per generator
- 23. FSSB SUBMISSION ISREQUIREDFSSB SUBMISSION IS REQUIRED LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION Submission
- 25. 50TH STOREY HEIGHTBUILDING50TH STOREY HEIGHT BUILDING
- 26. WET RISER ANDHOSEREEL SERVICEWET RISER AND HOSEREEL SERVICE DUCTDUCT
- 27. TESTING ANDTESTING AND COMMISSIONINGOF WETCOMMISSIONING OF WET RISERRISER
- 28. WET RISER REQUIREMENTSWETRISER REQUIREMENTS RESIDENTIAL COMMERCIAL & ANY MIXED BUILDING FLOW RATE 27L/S FOR FIRST 38L/S FOR THE FIRST RISING MAIN RISING MAIN 19L/S FOR EACH ADDITIONAL 13.5L/S FOR EACH RISING MAIN ADDITIONAL RISING MAIN MAXIMUM SUPPLY RATE OF 190L/S MAXIMUM SUPPLY RATE OF 135 L/S RUNNING PRESSURE 3.5BAR TO 5.5 BAR 3.5 BAR TO 5.5 BAR STATIC PRESSURE 8 BAR 8 BAR
- 29. PLAN VIEW FORWET RISER ANDPLAN VIEW FOR WET RISER AND HOSE REELHOSE REEL
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- 31. Check Valve Rubber Expansion Joint Gate Valvec/w limit switch
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