overview of cp52

7/29/2019 Overview of Cp52

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HIGHLIGHTS OF CHANGES IN THE

NEW SS CP 52 : 2004

CODE OF PRACTICE FOR

AUTOMATIC FIRE SPRINKLERSYSTEM

PREPARED BY : SIEW YEE CHEONG PE, RI(M&E), FSE

INTEGRATED BUILDING CONSULANTS

V. President, Institution of Fire Engineers, Singapore


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SS CP52 REVISIONREVIEWED BY A WORKING GROUP UNDER

SPRING SINGAPORE FROM 1999

COMPLETION OF DRAFT : 2003

PUBLIC COMMENTSAPPROVAL BY BUILDING AND

CONSTRUCTION STANDARD COMMITTEE

OFFICIAL RELEASE IN MAR. 2005IMPLEMENTATION BY FSSD WEF JAN 06


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REASONS OF REVISION Present Code published in 1990

Change of Based Reference CodeAS2118

Take care of new FSSD requirements

Update new PUB requirements

Incorporate new technologies

General improvements


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METHODS OF REVIEW WG was formed in end 1999

WG meets once a month at SPRING

SINGAPORE Representatives from IES, IFE, ACES,

Fire Contractor, FSSD, PUB and others

Review latest edition of AS 2118, AS4118 and AS 2941

Basic code structure remains

unchanged Re-insert tables after texts

Not to include residential sprinklers

Not to consider use of plastic pipes


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Working Group of SS CP 52Convenor Siew Yee Cheong

Members Leong Cheng WeeTay Teck Kiang

Yong Yit Lee/Ng Kok Leong

Andrew LohLoke Yee Weng

K. Ramanathan

Albert LamTang Kian Cheong

Yeow Mei Ling


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AUSTRALIAN STANDARDS 2118Major changes to the basic Code Structure taking

place over the past 10 years

2118.1 General requirements

2118.2 Wall wetting sprinklers (Drencher)

2118.3 Deluge

2118.4 Residential

2118.5 Domestic

2118.6 Combined sprinkler & hydrant

2118.8 Minor modifications

2118.9 Piping support and installation

2118.10 Approval document


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AUSTRALIAN STANDARDS 4118AS 4118 deals mainly with products specifications

for components used in Automatic Fire Sprinkler

System 4118.1.1 Sprinklers and sprayers

4118.1.2 Alarm valves (wet)

4118.1.3 Water motor alarm

4118.1.4 Valves monitors

4118.1.5 Deluge and pre-action valves

4118.1.6 Stop valves & non-return valves

4118.1.7 Alarm valves (dry)

4118.1.8 Pressure reducing valves

4118.1.9 Accelerators and exhausters

4118.2.1 Piping - General


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AUSTRALIAN STANDARDS 2941 Fixed Fire Protection Installations

Pumpset Systems

Referred by AS 2118 for fire pump

installation


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SINGAPORE STANDARDS CP52 : 2004 Scope

Definitions Classes of sprinkler system and

design data

Installation Water supplies

Spacing and location of

sprinklers

Sprinklers, sprayers and

multiple controls


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SINGAPORE STANDARDS CP52 : 2004 Piping

Valves and ancillary equipment Light hazard class systems

Ordinary hazard class systems

High hazard class systems

Full hydraulic calculation of sprinkler

systems


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Major Amendments To CP52 : 2004

More definitions incorporated

Define standard sprinklers and special

sprinklers

Hazard classification up-dated

Re-name hazard class

Protection of un-sprinklered building

Size of Installation

Re-cycling pre-action system removed Protection against exposure hazard added

System component fault monitoring added


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Major Amendments To CP52 : 2004 Pumps installed under suction lift

disallowed

Update sections on electric driver,compression-ignition driver and their

controllers

New requirements for vortex inhibitor Proving of water supplies changed

Sprinkler protection for external space

amended Permit use of NFPA standards, subject to

approval by relevant authority, for high

challenge storage occupancies.


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Major Amendments To CP52 : 2004 Location of installation valve better defined

Provisions of water alarm gong Remote test valve added

New section on pressure maintenance pump

Full hydraulic calculations for LH andconcealed space under OH

Increase max. spacing from 4m to 4.2m

between sprinklers and from 2m to 2.1mbetween sprinkler and wall for OH

Water tank capacity for HH revised

Section of full hydraulic calculations added


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More Definitions IncorporatedMore Definitions Incorporated1. New definitions for standard sprinklers &

special sprinklersStandard Sprinkler Special Sprinkler

Conventional Extended CoverageSpray Large Drop

Dry Pendant ESFR

Flush Extra large OrificeRecessed Enlarged orifice

Concealed

SidewallFast Response


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More Definitions IncorporationMore Definitions Incorporation2. Various type of sprinkler systems

b) Dry System

a) Wet system

c) Pre-action System

d) Deluge System

e) Tail-end System

f) ESFR System


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Hazard Classification UpHazard Classification Up

--dateddated

& Rename of Hazard Class& Rename of Hazard Class

1. No fundamental change of Hazard Class

a) Light Hazard (LH)

b) Ordinary Hazard 1 (OH I)

c) Ordinary Hazard 2 (OH II)

d) Ordinary Hazard 3 (OH III)

e) Ordinary Hazard Special (OH SP)

f) High Hazard 1 (HH)

i. Process Workii. Storage Work Cat.1 to Cat. 4


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ESFR Sprinkler SystemESFR Sprinkler System

1. Wet system.

2. Applied to high piled storage area only.

3. Design to Factory Mutual, Loss

Prevention Data and NFPA standards.

4. In-rack sprinklers can be reduced or

eliminated.

5. Design principle and operating

characteristics different from standardsprinklers.


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ComparisonComparison betnbetn ESFR Sprinklers & standard SprinklersESFR Sprinklers & standard Sprinklers

3.85.325.0 300

260

Assumed

Area of

Operation

(sq. m)

30.6

20.0

17.5

15.0

12.5

10.0

7.5

Discharge

Density

(mm/min)

Category 4Category 3Category 2

Maximum Stack Height Permitted for protection

by ceiling sprinklers only (m)

6.0

4.4

4.1

3.7

3.2

2.6

2.2

4.4

3.3

3.06.0-

2.75.6-

2.35.06.8

2.04.25.7

1.63.44.7

Category 1

Standard SprinklersStandard Sprinklers


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ESFR SprinklersESFR SprinklersAccording to table 12.3.4.3.1 of NFPA 13 for ESFR Protection of rack storage

without solid shelves of Class I through Class IV commodities stored over 7.6 m in height

Yes4.316.8

No2.825.2

Yes6.214.0

13.712.2

No2.825.2

Yes4.316.8

Yes6.214.0

13.7

No1.725.2

No3.616.8

No5.214.0

12.2

10.7

No2.825.2

Yes4.316.8

Yes6.214.0

13.7

No1.725.2

No3.616.8

No5.214.0

12.2

No1.425.2

No3.616.8

No5.214.0

10.7

9.1

In-Rack

Sprinkler

Min. Operating

Pressure (bar)

K factorMax. Ceiling

Roof (m)

Max. Storage

Ht (m)


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Hazard Classification UpHazard Classification Up

--dateddated

& Rename of Hazard Class& Rename of Hazard Class

2. Exhibition Halls from OH SP to HH.

e.g. Electrical appliance Cat. 1 if metal, Cat.

3 if plastic

3. List of Storage category up-dated.


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Sprinkler Protected BuildingSprinkler Protected Building1. A sprinkler protected building to be

sprinkler protected throughout no

change.2. Separation of un-sprinkler building reduces

from 4 hours to 2 hours fire resistance

rating.


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1. Provision of

external sprinkler

to glazed openingor roof overhang

of sprinkler

buildings2. Applied where

external wall is

less than 1/2 hourfire rating and

located within 10m

of an explosivehazard.

Explosion hazardExplosion hazard


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Size Of Installation Per Control ValveSize Of Installation Per Control Valve1. For LH & OH 9,000m2

2. For HH 8,000m2

3. For HH with high pile storage 6,000m2where area >1000 m2

4. For HH with high pile storage 8,000m2

where area


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Provision Of Fault Monitoring ForProvision Of Fault Monitoring For

System ComponentsSystem ComponentsClass A monitoring devices shall be installed in

all cases except that that Class B devices arepermitted where the monitored components are

located within a secure area or room with

access restricted by means of security devicesor a system providing at least the same level of

security as achieved with Class A monitoring.


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Provision Of Fault Monitoring ForProvision Of Fault Monitoring For

System ComponentsSystem ComponentsClass A monitoring devices shall transmit a signal

upon:a) A change of status of the monitored equipment

b) Any attempt to tamper with or bypass the

monitoring device, and

c) Any attempt to tamper with or bypass the

connection back to the receiving center

Class B monitoring devices shall transmit a signal

upon:

a) A change of status of the monitored equipment

b) Any attempt to tamper with or bypass the

connection back to the receiving center


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System To be MonitoredSystem To be MonitoredContinuous system shall be installed -a) In systems containing High Hazard portions greater than

300m2

b) In buildings greater than 25m effective height; andc) Where required by acts or regulations

The following components shall be monitoreda) Water supply stop valves excluding underground key-

operated valves.

b) Mains stop valves.

c) Subsidiary stop valves.d) Power supply for each electric-motor driven pumps.

e) Controller ready to start condition battery voltage and

fuel level for each compression-ignition driven pump.

Components To be Monitored


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Pumps not to be installed underPumps not to be installed under

suction lift conditionssuction lift conditions1. System reliability

2. Maintenance problem

3. Disallowed by NFPA 13.

4. Sunken tank still possible when turbine type of pump

is used.


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Proving Of Water SuppliesProving Of Water Supplies1. For pump installation, water proving is to be carried

out the pump similar to NFPA 13/ 20.

2. For gravity tank , water proving remains at Control

Valve.


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Requirements For PumpRequirements For Pump1. No. of pumps remains unchanged.

2. Separate section provided for electric drivers and

electric controllers .

3. Separate section provided for compression-ignition

drivers and controllers.

4. New section on pressure maintenance pump added.- Size not exceeding 4 L/min to take care of allowable

leakage.


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Protection of AtriumProtection of Atrium

1. For non-industrial building only,

atrium not exceeding 12m areexempted from sprinkler protection,

subject to no commercial activities

or storage below atrium roof andinstallation of detection system.


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Protection Of External SpacesProtection Of External Spaces1. For non-industrial building only, sprinkler protection

to canopy, car porch,open-sided link way not

required not required is in line with the Fire Code.

Location Of Control Valve1. Externally near or adjacent to FCC, inside fire

fighting lobby or in a protected area readilyaccessible from common area.

Water Alarm Gong1. No restriction on the no. of CVs that a single wateralarm gong it serves.


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Light Hazard Class SystemLight Hazard Class System

1. Design data changed to 48 L/min per

sprinkler for operating up to 6 sprinklers.

2. Water tank capacity 30 min water flow

plus 20%


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Remote Test ValveRemote Test Valve1. To be provided for commissioning and periodic

testing.

2. > 25mm Pipe at end of range pipe in remote group of

sprinklers.3. Additional test valve at highest level.

4. Readily accessible, locked shut and labeled.


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Sprinkler Spacing For OHSprinkler Spacing For OH

1. Between sprinkler from 4.0m to 4.2m

Sprinkler to wall from 2.0m to 2.1m

2. Side wall sprinkler along wall from 3.7m to 3.4m ifceiling is combustible.

Use of Full Hydraulic CalculationDesign Encourage

1. LH to be fully hydraulically calculated using new set of

design parameters

2. Concealed space protection under OH to be fully

hydraulically calculated.

3. Pre-calculated piping design still allowed for OH design.


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Revived Water Storage Capacity for HHRevived Water Storage Capacity for HH

901094 00030.0

901002 00027.5

90911 00025.090820 00022.5

90729 00020.0

90553 00017.5

90474 00015.0

90395 00012.5

90316 00010.0

90237 0007.5

Maximum Period of

Inflow For Suction

Tanks (Min)

Minimum

Capacity L

Design

Density


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No ChangesNo Changes

1. Design data for OH and HH.2. Pump requirements for OH and HH

3. Water Tank Capacity for OH

a) Using shared water tank with wet risersystem

b) Reduced water tank size as permitted by

FSSD with conditions.4. Maximum coverage per sprinkler

5. Beams rule


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ENDEND

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