Dry & Wet Riser Systems
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Transcript of Dry & Wet Riser Systems
![Page 1: Dry & Wet Riser Systems](https://reader034.fdocuments.in/reader034/viewer/2022052118/58f9ad53760da3da068b9715/html5/thumbnails/1.jpg)
DRY & WET DRY & WET
RISER RISER
SYSTEMSSYSTEMS
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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
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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
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The riser and landing valves shall be housed in:
• A protected area or lobby or shaft
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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
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TYPE OF THE SYSTEMTYPE OF THE SYSTEM
LANDING LANDING VALVEVALVE
Dry Riser SystemDry Riser System
BREECHING INLETBREECHING INLET
AIR AIR RELEASEDVALVERELEASEDVALVE
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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
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Requirement of dry riser installation
•2- way breeching inlet for Ø100mm rising main
•4- way breeching inlet for Ø 150mm rising main
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Breeching Inlet
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Air Release valve
Hand Wheel
Landing Valve
Anti-Thief Device
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FSSB SUBMISSION IS NOT REQUIRED FSSB SUBMISSION IS NOT REQUIRED
LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION
Submission
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ConventionalConventional
PUMP FEED
GRAVITY FEED
TRANSFER PUMP
WET RISER PUMPS
JOCKEY PUMP
FROM PUB SUPPLY
4 WAY BREECHING INLET
LANDING VALVE
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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
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Down Comer System Down 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)
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Transfer Water Tank Design
• One rising main = 11.5 m3 (15min) @ 27 l/s
• Two rising main = 23 m3 (15min) @ 38 l/s
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Roof top wet riser tank layoutRoof top wet riser tank layout
DIA 3.621m 1m
2m
3m length for pump set
1mRing 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
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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
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Building Above 120mBuilding Above 120m
FROM PUB SUPPLY
1ST STOREY
Mid-Storey
Roof Storey
WET RISER PUMPHOSEREEL PUMPTRANSFER PUMP
Down feed
Down feed
Transfer tanks
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Power required
• PUB supply• Generator - supply to 4 blocks per generator
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FSSB SUBMISSION IS REQUIRED FSSB SUBMISSION IS REQUIRED
LOCAL AUTHORITIES SUBMISSIONLOCAL AUTHORITIES SUBMISSION
Submission
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50TH STOREY HEIGHT BUILDING50TH STOREY HEIGHT BUILDING
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WET RISER AND HOSEREEL SERVICE WET RISER AND HOSEREEL SERVICE DUCTDUCT
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TESTING AND TESTING AND
COMMISSIONING OF WET COMMISSIONING OF WET
RISERRISER
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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
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PLAN VIEW FOR WET RISER AND PLAN VIEW FOR WET RISER AND HOSE REELHOSE REEL
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Check Valve
Gate Valve
Drain Cock
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Check Valve
Rubber Expansion Joint
Gate Valve c/w
limit switch
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Pilot Valve
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Motorize Valve
Pressure Relief Valve
Bypass system
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Flow Meter
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Motorize Valve
Gate Valve
Down feed
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Pilot Valve
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Check Valve
Flow Switch
Down feed Pipe
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Duty Pump
Standby Pump
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Fire Pump
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Jockey Pump
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Level Indicator
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Landing ValveStrap Lock
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Air Release
valve
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Drain Cock
Limit Switch
Butterfly valve
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Check Valve
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Piping
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Pressure Switches
Pressure Gauge
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Limit Switch Indicator Panel
Alarm Bell
Fire Extinguisher
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Wet Riser Control Panel