HIGHLIGHTS OF CHANGES IN THENEW SS CP 52 : 2004 CODE OF PRACTICE FOR AUTOMATIC FIRE SPRINKLER SYSTEM PREPARED BY : SIEW YEE CHEONG PE, RI(M&E), FSE INTEGRATED BUILDING CONSULANTS V. President, Institution of Fire Engineers, Singapore SS CP52 REVISION REVIEWED BY A WORKING GROUP UNDER SPRING SINGAPORE FROM 1999 COMPLETION OF DRAFT : 2003 PUBLIC COMMENTS APPROVAL BY BUILDING AND CONSTRUCTION STANDARD COMMITTEE OFFICIAL RELEASE IN MAR. 2005 IMPLEMENTATION BY FSSD WEF JAN 06 REASONS OF REVISION • Present Code published in 1990 • Change of Based Reference Code AS2118 • Take care of new FSSD requirements • Update new PUB requirements • Incorporate new technologies • General improvements 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, AS 4118 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 Working Group of SS CP 52 Convenor Siew Yee Cheong Members Leong Cheng Wee Tay Teck Kiang Yong Yit Lee/Ng Kok Leong Andrew Loh Loke Yee Weng K. Ramanathan Albert Lam Tang Kian Cheong Yeow Mei Ling AUSTRALIAN STANDARDS 2118 Major 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 AUSTRALIAN STANDARDS 4118 AS 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 AUSTRALIAN STANDARDS 2941 • Fixed Fire Protection Installations – Pumpset Systems • Referred by AS 2118 for fire pump installation 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 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 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 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. 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 and concealed space under OH • Increase max. spacing from 4m to 4.2m between sprinklers and from 2m to 2.1m between sprinkler and wall for OH • Water tank capacity for HH revised • Section of full hydraulic calculations added More Definitions Incorporated More Definitions Incorporated 1. New definitions for standard sprinklers & special sprinklers Standard Sprinkler Special Sprinkler Conventional Extended Coverage Spray Large Drop Dry Pendant ESFR Flush Extra large Orifice Recessed Enlarged orifice Concealed Sidewall Fast Response More Definitions Incorporation More Definitions Incorporation 2. 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 Hazard Classification Up Hazard Classification Up - - dated dated & 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 Work ii. Storage Work – Cat.1 to Cat. 4 ESFR Sprinkler System ESFR 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 standard sprinklers. Comparison Comparison bet’n bet’n ESFR Sprinklers & standard Sprinklers ESFR Sprinklers & standard Sprinklers 3.8 5.3 25.0 300 260 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 4 Category 3 Category 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 3.0 6.0 - 2.7 5.6 - 2.3 5.0 6.8 2.0 4.2 5.7 1.6 3.4 4.7 Category 1 Standard Sprinklers Standard Sprinklers ESFR Sprinklers ESFR Sprinklers According 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 Yes 4.3 16.8 No 2.8 25.2 Yes 6.2 14.0 13.7 12.2 No 2.8 25.2 Yes 4.3 16.8 Yes 6.2 14.0 13.7 No 1.7 25.2 No 3.6 16.8 No 5.2 14.0 12.2 10.7 No 2.8 25.2 Yes 4.3 16.8 Yes 6.2 14.0 13.7 No 1.7 25.2 No 3.6 16.8 No 5.2 14.0 12.2 No 1.4 25.2 No 3.6 16.8 No 5.2 14.0 10.7 9.1 In-Rack Sprinkler Min. Operating Pressure (bar) K factor Max. Ceiling Roof (m) Max. Storage Ht (m) Hazard Classification Up Hazard Classification Up - - dated dated & 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. Sprinkler Protected Building Sprinkler Protected Building 1. 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. 1. Provision of external sprinkler to glazed opening or roof overhang of sprinkler buildings 2. Applied where external wall is less than 1/2 hour fire rating and located within 10m of an explosive hazard. Explosion hazard Explosion hazard Size Of Installation Per Control Valve Size Of Installation Per Control Valve 1. For LH & OH 9,000m2 2. For HH 8,000m2 3. For HH with high pile storage 6,000m2 where area >1000 m2 4. For HH with high pile storage 8,000m2 where area <1000 m2 5. For HH in-rack sprinkler 4,000m2 (rack area) Existing requirement 1. For ELH 500 sprinklers 2. For OH & EHH 1000 sprinklers Provision Of Fault Monitoring For Provision Of Fault Monitoring For System Components System Components Class A monitoring devices shall be installed in all cases except that that Class B devices are permitted where the monitored components are located within a secure area or room with access restricted by means of security devices or a system providing at least the same level of security as achieved with Class A monitoring. Provision Of Fault Monitoring For Provision Of Fault Monitoring For System Components System Components Class 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 System To be Monitored System To be Monitored Continuous system shall be installed - a) In systems containing High Hazard portions greater than 300m2 b) In buildings greater than 25m effective height; and c) Where required by acts or regulations The following components shall be monitored a) 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 Pumps not to be installed under Pumps not to be installed under suction lift conditions suction lift conditions 1. System reliability 2. Maintenance problem 3. Disallowed by NFPA 13. 4. Sunken tank still possible when turbine type of pump is used. Proving Of Water Supplies Proving Of Water Supplies 1. 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. Requirements For Pump Requirements For Pump 1. 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. Protection of Atrium Protection of Atrium 1. For non-industrial building only, atrium not exceeding 12m are exempted from sprinkler protection, subject to no commercial activities or storage below atrium roof and installation of detection system. Protection Of External Spaces Protection Of External Spaces 1. 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 Valve 1. Externally near or adjacent to FCC, inside fire fighting lobby or in a protected area readily accessible from common area. Water Alarm Gong 1. No restriction on the no. of CVs that a single water alarm gong it serves. Light Hazard Class System Light 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% Remote Test Valve Remote Test Valve 1. 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. Sprinkler Spacing For OH Sprinkler 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 if ceiling is combustible. Use of Full Hydraulic Calculation Design 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. Revived Water Storage Capacity for HH Revived Water Storage Capacity for HH 90 1094 000 30.0 90 1002 000 27.5 90 911 000 25.0 90 820 000 22.5 90 729 000 20.0 90 553 000 17.5 90 474 000 15.0 90 395 000 12.5 90 316 000 10.0 90 237 000 7.5 Maximum Period of Inflow For Suction Tanks (Min) Minimum Capacity L Design Density No Changes No 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 riser system b) Reduced water tank size as permitted by FSSD with conditions. 4. Maximum coverage per sprinkler 5. Beams rule END END