Dry & Wet Riser Systems
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Dry & Wet Riser Systems
- 1. DRY & WETDRY & WET RISERRISER SYSTEMSSYSTEMS
- 2. Who to decide on 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 of rising 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 and landing valves shall be housed in: • A protected area or lobby or shaft
- 5. Where to locate the 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 THE SYSTEMTYPE OF THE SYSTEM LANDINGLANDING VALVEVALVE Dry Riser SystemDry Riser System BREECHING INLETBREECHING INLET AIRAIR RELEASEDVALVERELEASEDVALVE
- 7. Requirement of dry riser 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 dry riser installation •2- way breeching inlet for Ø100mm rising main •4- way breeching inlet for Ø 150mm rising main
- 11. Air Release valve Hand Wheel Landing Valve Anti-Thief Device
- 12. FSSB SUBMISSION IS NOT REQUIREDFSSB SUBMISSION IS NOT REQUIRED LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION Submission
- 15. ConventionalConventional PUMP FEED GRAVITY FEED TRANSFER PUMP 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 SystemDown Comer 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 Tank Design • One rising main = 11.5 m3 (15min) @ 27 l/s • Two rising main = 23 m3 (15min) @ 38 l/s
- 19. Roof top wet riser 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 tank capacity • 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 120mBuilding Above 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 • PUB supply • Generator - supply to 4 blocks per generator
- 23. FSSB SUBMISSION IS REQUIREDFSSB SUBMISSION IS REQUIRED LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION Submission
- 25. 50TH STOREY HEIGHT BUILDING50TH STOREY HEIGHT BUILDING
- 26. WET RISER AND HOSEREEL SERVICEWET RISER AND HOSEREEL SERVICE DUCTDUCT
- 27. TESTING ANDTESTING AND COMMISSIONING OF WETCOMMISSIONING OF WET RISERRISER
- 28. WET RISER REQUIREMENTSWET RISER 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 FOR WET RISER ANDPLAN VIEW FOR WET RISER AND HOSE REELHOSE REEL
- 31. Check Valve Rubber Expansion Joint Gate Valve c/w limit switch
- 32. Pilot Valve
- 34. Flow Meter
- 36. Pilot Valve
- 39. Fire Pump
- 40. Jockey Pump
- 41. Level Indicator
- 45. Check Valve
- 46. Piping