4 FIRE FIGHTING SYSTEM ........................................................................... 3
4.1 GENERAL .................................................................................................... 3
4.1.1 Scope 3
4.1.2 Codes and Standards 3
4.2 SPRINKLER SYSTEMS .............................................................................. 4
4.2.1 System Description 4
4.2.2 Sprinkler Heads 5
4.2.3 Sprinkler System Alarm Devices 5
4.2.4 Alarm Valve 5
4.2.5 Basic Trip and Retarding Chamber 5
4.2.6 Pressure Alarm Switches 6
4.2.7 Water Motor Alarms 6
4.2.8 Stop Valves 6
4.2.9 Zoning Valve 6
4.2.10 Water Flow Detectors 6
4.2.11 Drain and Test Orifice 6
4.3 WATER SUPPLY ......................................................................................... 6
4.3.1 General 6
4.4 HOSE REELS AND HOSES ........................................................................ 7
4.4.1 General 7
4.4.2 Cabinets 7
4.4.3 Hose Reels with Semi-Rigid Hose 7
4.4.4 Hose Systems with Lay-flat Hose 8
4.5 FIRE HYDRANTS ........................................................................................ 9
4.5.1 General 9
4.5.2 High Pressure Dry Barrel Hydrant 9
4.5.3 Underground Fire Hydrants and Surface Box Frames and Covers 10
4.6 PIPES AND FITTINGS .............................................................................. 11
4.6.1 General 11
4.6.2 Hangers Supports Anchors and Guide 12
4.7 PUMPS ...................................................................................................... 12
4.7.1 General 12
4.7.2 Horizontal Fire Pumps 13
4.7.3 Construction 13
4.7.4 Fittings 13
4.7.5 Electric Motors 14
4.7.6 Compression Ignition Engine 14
4.7.7 Controller and Transfer Switch 14
4.7.8 Alarm Panel 14
4.7.9 Jockey Fire Pumps 14
4.7.10 Field Quality Control 15

4.8 WET RISERS ............................................................................................ 15
4.8.1 General 15
4.9 PORTABLE FIRE EXTINGUISHERS ........................................................ 16
4.9.1 General 16
4.10 FIRE BLANKETS ....................................................................................... 17
4.10.1 General 17
4.11 FM 200 SYSTEM ....................................................................................... 17
4.11.1 System description 17
4.11.2 Equipment Instruction -Plates 17
4.11.3 Basic Pipes and Pipe fittings 17
4.11.4 Control Panel 18
4.11.5 Storage Cylinders 19
4.11.6 Discharge Valve 19
4.11.7 Discharge Nozzles 19
4.11.8 Pressure Switch 19
4.11.9 Smoke Detectors 19
4.11.10 Graphic Annunciator 19
4.11.11 Battery Backup Power System 20
4.11.12 Alarm Horn/strobe Combination 20
4.11.13 Manual Pull Stations 20
4.11.14 Abort Switch 20
4.11.15 Automatic Fire Dampers 20
4.11.16 Basic Identification of Installation 20
4.11.17 Installation of Pipes and Pipe Fittings 21
4.11.18 Pressure Test 21
4.11.19 Flow and Compliance Test 21
4.11.20 Painting 22
4.11.21 CAPSULAR TYPE - FIRE EXTINGUISHING AND SUPPRESSION SYSTEM for the MCC/MV panels 22

4 FIRE FIGHTING SYSTEM
4.1 GENERAL

 

4.1.1 Scope
1 This Part specifies the requirements for fire fighting systems.

2 Related Sections are as follows:

 

 

Section 21 Electrical Works
4.1.2 Codes and Standards
1 The following standards are referred to in this Part:

 

 

ANSI B16.1 ................ Cast iron pipe flanges and flanged fittings
ANSI B16.5 ................ Pipe flanges and flanged fittings

ASTM A 47 ................. Specification for Ferritic Malleable Iron Castings
ASTM A 106 ............... Specification for Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A 135 ............... Specification for Electric-Resistant-Welded Steel pipe
ASTM A 183 ............... Specification for Carbon Steel track Bolts and Nuts
ASTM A 197 ............... Specification for Cupola Malleable Iron
ASTM A 234 ............... Specification for Pipe Fittings of Wrought Carbon Steel and Alloy for Moderate and Elevated temperatures
ASTM A 395 ............... Specification for Ferritic Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures
ASTM A 536 ............... Ductile Iron Castings

BS 750........................ Underground fire hydrants and surface box frames and covers
BS EN 1561 ............... Specification for grey iron castings
BS EN 1563 ............... Iron castings with spheroidal or nodular graphite
BS 5163 ..................... Double flanged cast iron wedge gate valves for waterworks purposes
BS 5423 ..................... Portable fire extinguishers
BS 6575 ..................... Fire blankets
BS EN 671 ................. Fixed fire fighting systems – Hose systems

NFPA 13 ..................... Installation of Sprinkler Systems
2 In addition to the above, all aspects of the fire fighting system shall comply with applicable national and international codes and standards including, but not limited to, those issued by the following organisations:

(a) Civil Defence Department

(b) National Fire Prevention Association (NFPA)

(c) British Standards (BS)

(d) Loss prevention Council Board (LPCB)

 

 

4.2 SPRINKLER SYSTEMS

 

4.2.1 System Description
1 Wet pipe sprinkler systems shall employ automatic sprinklers attached to a piping system containing water and connected to a water supply. Each pipeline in the system shall be fully pressurised, so that water discharges immediately from sprinklers opened by a fire.

2 The system shall be designed that only those sprinklers that have been activated by heat will discharge water.

3 The design of the sprinkler system indicated on the Project Drawings is indicative only and is to be taken as general guide and not as final design unless specifically noted otherwise. The final detail design (including manufacturer components) shall be fully developed by the Contractor strictly in accordance with the requirements of the Civil Defence Department and the rules for automatic sprinkler installations in accordance with the relevant provisions of NFPA 13. The Contractor shall allow in his rates for components of sprinkler systems that are required to meet requirements but are not shown on the Project Drawings.

4 The fire fighting system shall be fed from a centralised fire water storage tank located inside the building or the basement of the building unless otherwise indicated in the Project Documentation.

5 The sprinkler system for each building shall be complete with an automatic packaged fire pumping station and valves, water motor alarm and gong, pressurised water main with distribution pipework, range pipes, hangers and supports, sprinkler heads and a piped drain system.

6 The sprinkler system shall be interconnected with the central fire alarm panel in order that the alarm bells and zone valves in various locations can be actuated.

7 The water motor alarm and gong should consist of a simple water turbine having the shaft connected to a rotary ball clapper mounted within a domed gong. The alarm system shall be self-winding, adjustable recycling non-thermal type and equipped with signal retarding device to prevent false alarms due to surges in the water system. Auxiliary pressure and flow sensing devices shall be incorporated in the feed to the alarm gong to actuate the central fire alarm panel.

8 A test valve shall be incorporated on a branch pipe from the alarm valve to allow operational conditions to be simulated for test purposes. Water from the test valve shall be properly drained.

9 The distance between sprinklers shall not exceed 3.5 m. The maximum floor area to be covered by a single sprinkler for different hazard class are as follows:

(a) ordinary hazard = 12 m2

(b) extra light hazard = 21 m2

(c) extra high hazard = 9 m2

10 The distance from the walls to the end sprinklers on the branch lines shall not exceed half of the allowable distance between sprinklers on the branch lines. The distance from the walls to the end branch lines shall not exceed half the allowable distance between the branch lines.

11 The allowable distance between sprinklers on the branch lines is determined by the actual distance between the branch lines and the permissible protection area per sprinkler.

 

 

12 The Contractor shall install an adequate quantity of additional sprinkler heads of the correct temperature rating. The number will depend on the size of the installation and number of sprinkler heads likely to be opened. The following figures are the minimum number of additional sprinkler heads that should be installed:

(a) for systems not exceeding 300 sprinklers, 6 spare heads shall be installed

(b) for systems exceeding 300 sprinklers but not exceeding 1000, 12 spare heads shall be installed

(c) for systems exceeding 1000 sprinklers, 24 spare heads shall be installed.

13 All components for sprinkler system packages should be from one single manufacturer with an approved local agent. The Contractor shall maintain a technical representative from the manufacturer or the local agent on site for the duration of the Contract in order to supervise the installation. This representative shall issue a certificate upon completion of the Project stating that the complete system has been installed, tested and commissioned in accordance with the Project Documentation, the requirements of the NFPA and the Civil Defence Department.

 

 

4.2.2 Sprinkler Heads
1 The glass bulb sprinkler heads should be of the upright pendant type and rated for 68oC. They shall be arranged such that there is not interference with the discharge pattern and they shall be positioned between 75 and 150 mm below ceilings.

2 The sprinklers and pipelines shall not be spaced too close together in order to prevent an operating sprinkler from wetting, and thereby delaying the operation of, adjacent sprinklers.

3 In locations where sprinkler heads are liable to be operated or damaged by accidental blow, they should be protected by stout metal guards. Care shall be taken to ensure that the normal operation of the sprinkler head in the event of a fire is not impeded by such guards.

4 Sprinklers in false ceilings areas shall be the concealed or recessed type. They shall be the two-piece design with closure and mounting plate which allows for easy installation and removal.

5 Sprinklers in parking and hardware areas shall be the pendant or upright bulb type with a 12 mm diameter orifice and temperature rated to 68oC with a natural brass finishes and sprinkler guard.

 

 

4.2.3 Sprinkler System Alarm Devices
1 The system shall be provided with alarm devices consisting of, but not limited to, the items described in the following clauses.

 

 

4.2.4 Alarm Valve
1 Alarm valves shall be UL listed and FM approved. They shall be check type, with a rubber faced clapper, designed for use in wet pipe systems for automatic actuation. The alarm valve may be installed vertically or horizontally with inlet and outlet connection in accordance with the relevant provisions of ANSI B 16.1.

 

 

4.2.5 Basic Trip and Retarding Chamber
1 Basic trip and retarding chamber shall be UL listed and FM approved. It shall be used in order to prevent any false alarm that may be caused by small variation in pressure. The chamber should consist of a by-pass check valve to permit slow as well as small transient increases in water supply pressure to be passed through to the system and held at their highest value, without opening of the water way clapper.

 

 

4.2.6 Pressure Alarm Switches
1 Pressure alarm switches shall be UL listed and FM approved. They shall be designed to indicate a water discharge from automatic sprinkler and the start-up or shut down of auxiliary fire protection system equipment. The one single pole double throw snap-action switch.s components shall be enclosed in an oil resistant IP 22 rated enclosure.

 

 

4.2.7 Water Motor Alarms
1 Water motor alarms shall be UL listed and FM approved. They shall be hydraulically operated outdoor alarms, designed for use with fire protection system water flow detection devices. They shall be suitable for mounting to any type of rigid wall and to consist of an approved “Y” strainer for use in the alarm line utilising a high energy efficient, light weight, impeller design which can produce a very high sound pressure level. The gong, gong mount, and water motor casing shall be made with corrosion resistant aluminium alloy. The drive shall be of the type that does not require lubrication.

 

 

4.2.8 Stop Valves
1 Stop valves shall be UL listed and FM approved. They should be the gate valve type, designed specifically for fire line applications, where a positive indication of the open or closed position is necessary. The valve shall have flanged ends, an iron body and a working pressure of 12 bar.

 

 

4.2.9 Zoning Valve
1 Zoning valves shall be UL listed and FM approved. They shall be gear operated butterfly valves with internal or external monitor switch. They shall have a wafer or lug style body for mounting between ANSI 125/150 flanges. They shall be rated for a 12 bar operating pressure and have a cast iron body and an EPDM seat with bronze disc.

 

 

4.2.10 Water Flow Detectors
1 Water flow detectors shall be UL listed and FM approved and shall be designed for use with wet pipe, automatic sprinkler systems. They shall utilise a vane type sensor to actuate two (2) single pole double throw snap-action switches when water flows at a sustained rate of 17.5 litres or more. They shall be used where sectional water flow signals are required.

 

 

4.2.11 Drain and Test Orifice
1 The system shall incorporate a 30 mm drain and a 13 mm test orifice for flow control inspection testing and drainage of feed mains.

 

4.3 WATER SUPPLY

 

4.3.1 General
1 Unless otherwise stated elsewhere in the Project Documentation, the water supply shall consist of:

(a) electric motor driven fire pump with back-up

(b) diesel motor driven fire pump with back-up

2 The capacity of the reservoirs from which fire fighting systems draw water shall be as stated in the Project Documentation.

 

 

4.4 HOSE REELS AND HOSES

 

4.4.1 General
1 Hose reels and hoses shall be installed in locations as stated in the Project Documentation unless otherwise directed by the Civil Defence Department.

2 Fire hose reel assemblies shall be provided with full operational instructions for display on or adjacent to the hose reel.

3 The supplier shall make available an installation and maintenance manual for the hose reel.

4 All hose systems shall be such that they can be operated efficiently by one person and that such system shall have a long service life and will not need excessive maintenance.

5 Hose reels shall be marked with the following information:

(a) suppliers name or trademark, or both

(b) year of manufacture

(c) maximum working pressure

(d) length and bore of hose

(e) nozzle diameter (marked on the nozzle)

 

 

4.4.2 Cabinets
1 Cabinets shall be fitted with a door. The door shall open approximately 180. to allow the hose to run at freely in any direction.

2 Cabinets shall have suitable ventilation openings.

3 Cabinets shall be fitted with a lock if required by the Project Documentation. Lockable cabinets shall be fitted with an emergency opening device.

4 To provide access for inspection and maintenance, the cabinet shall be unlockable with a key or a special opening device. Lockable cabinets shall have provision for a security seal to be fitted.

 

 

4.4.3 Hose Reels with Semi-Rigid Hose
1 Hose reels with semi-rigid hose shall generally comply with BS EN 671-1.

2 The nominal bore of the hose shall be 19 mm or 25 mm or 33 mm.

3 The maximum length of the hose shall not exceed 30 m.

4 The reel shall rotate around a spindle. The reel shall consist of two wheel discs with a maximum diameter not more than 800 mm, and inside segments or drum with a minimum diameter not less than 200 mm for 19 mm and 25 mm hose and minimum diameter not less than 280 mm for 33 mm hose. The discs shall be red in colour.

5 The hose shall terminate in a shut-off nozzle which shall give the following control settings:

(a) shut

(b) spray (sheet or conical) and/or jet.

 

 

6 Rotary operated nozzles shall be marked to show the direction of closing and opening. Lever operated nozzles shall be marked to show the setting for:

(a) shut

(b) spray and/or jet.

7 A manual or automatic inlet stop valve shall be fitted to each hose reel.

8 Working, test and minimum burst pressure for hose reels shall be as given in Table 4.1, unless otherwise stated in the Project Documentation or agreed with the Engineer.

 

 


Table 4.1
Pressure for Hose Reels
Nominal Diameter
(mm)
Working Pressure
(bar)
Test Pressure
(bar)
Minimum Burst Pressure
(bar)

19
12
18
30

25
12
18
30

33
7
10.5
17.5

9 Testing, performance and materials of hose reels with semi-rigid hose shall comply with the relevant provisions of BS EN 671-1.

 

 

4.4.4 Hose Systems with Lay-flat Hose
1 Hose systems with lay-flat hose shall generally comply with BS EN 671-2.

2 The hose system shall be designed for mounting in one of the following forms:

(a) in a wall recess with cover

(b) in a cabinet in a wall recess

(c) in a cabinet for surface mounting

3 The hose support shall be one of the following types:

(a) Type 1: rotating reel

(b) Type 2: cradle with the hose double coiled

(c) Type 3: hose basket with the hose flaked

4 With Type 1 hose supports, the reel shall rotate around a spindle so that the hose can be withdrawn freely. The inside drum shall have a minimum diameter of not less than 70 mm and shall have a slit not less than 20 mm wide across the full diameter of the drum into which the folded house is located.

5 Type 1 and 3 supports, if fixed to the cabinet, shall allow a swing to a position at 90. to the plane of the back of the cabinet. The turning axis shall be vertical.

6 The hose shall be lay-flat, with a nominal bore of 52 mm, and shall not exceed 20 m in length.

7 A coupling shall be used to connect the hose to the valve and to the shut-off nozzle. The coupling shall be bound to the hose by means of an even pressure over the complete perimeter of the hose against the coupling shank.

 

 

8 The hose shall terminate in a shut-off nozzle which shall give the following control settings:

(a) shut

(b) spray (sheet or conical) and/or jet.

9 Rotary operated nozzles shall be marked to show the direction of closing and opening. Lever operated nozzles shall be marked to show the setting for:

(a) shut

(b) (spray and/or jet.

10 A manual inlet stop valve shall be fitted to the hose system. The valve shall be screw down or other slow-opening type. The inlet and outlet of the valve shall form an angle of not less than 90. and not more than 135.

11 Hose assemblies shall be designed for the following pressures unless otherwise stated in the project documentation or agreed with the Engineer:

(a) maximum working pressure shall be 12 bar

(b) test pressure shall be 24 bar

(c) minimum burst pressure shall be 42 bar

12 Testing, performance and materials of hose systems with lay-flat hose shall comply with the relevant provisions of BS EN 671-2.

 

4.5 FIRE HYDRANTS

 

4.5.1 General
1 Fire hydrants shall be installed in locations as stated in the Project Documentation unless otherwise directed by the Civil Defence Department.

2 A certificate shall be obtained from the manufacturer stating that the fire hydrants to be supplied are suitable for use in Qatar.

3 Fire hydrants shall be installed in accordance with the manufacturer.s instructions.

 

 

4.5.2 High Pressure Dry Barrel Hydrant
1 High pressure dry barrel hydrants shall come complete with removable/replaceable nozzles and hydrant seat, top stop nut, easily repaired traffic section, nozzle section with 360° rotation, main valve opening and bronze drain plug.

2 Working pressure of the hydrant shall be 14 bar and the testing pressure shall be 28 bar unless otherwise stated in the Project Documentation or agreed with the Engineer.

3 The hydrant shall comply with ASNI/AWWA C502 and shall be UL listed and FM approved.

4 Materials for the hydrants shall be as follows:

(a) nozzle section, barrels, stand pipe flanges, breakable flange, base, main valve flange, weather-shield operating nut and bonnet all shall be ductile iron

(b) main valve disc shall be ductile iron core and fully encapsulated in EPDM rubber

(c) caps shall be cast iron

(d) coating above ground shall be fusion bonded epoxy inside and out

(e) coating below ground shall be bitumen or fusion bonded epoxy

 

 

(f) nozzles, valve seat ring, drain ring, drain bushings and plugs, stem nut, stem bushing and thrust nut shall be bronze

(g) stop nut, cap chain, bolts and nuts shall be zinc plated steel

(h) stem rod coupling, standpipe lock rings, nozzle lock screw, lock plate, lock plate screw and spider bolt shall be stainless steel

(i) barrel gaskets and cap gaskets shall be nitrile rubber.

5 Each hydrant shall be clearly marked, either integrally with the stated components or on a plate of durable material securely fixed to that component, as follows:

(a) the number of the standard to which the hydrant conforms and the date of the standard

(b) the manufacturer.s name or trade mark

(c) the identification number (the reference used by the manufacturer allowing identification for the supply of spares, etc).

 

 

4.5.3 Underground Fire Hydrants and Surface Box Frames and Covers
1 Underground fire hydrants and surface box frames and covers shall generally comply with the requirements of BS 750.

2 Underground fire hydrants with wedge gate type or screw down type valves shall be suitable for a maximum working pressure of 16 bar.

3 Fire hydrants shall be of the wedge gate type or screw-down type.

4 The wedge gate valve shall comply with the requirements of BS 5163 for PN 16 valves. The associated duck foot bends shall be grey cast iron (CI) to BS EN 1561 Grade 250 or spheroidal graphite cast iron (SG) to BS EN 1563.

5 Materials and testing of underground fire hydraulic shall be to BS 750. Provision shall be made for a certificate to be made available which certifies that the hydrant has complied with all testing requirements of BS 750.

6 Each screw-down type hydrant and each duck foot bend on a wedge gate type hydrant shall be provided with a drain boss on the outlet side. It shall be located at the lowest practicable point.

7 The hydrants shall have screwed outlets. The screwed outlet shall be provided with a cap to cover the outlet thread. It shall be securely attached to the hydrant by a chain or other flexible device.

8 When fitted with a standard round thread outlet, the hydrant shall deliver not less than 2000 litres/minute at a constant pressure of 1.7 bar at the inlet to the hydrant.

9 The hydrant operating spindle shall be provided with a cast iron cap complying with the requirements of BS 5163. The cap shall be securely fixed to the spindle so that it remains fixed in position during normal use.

10 Each hydrant valve, duckfoot bend and outlet shall be clearly marked, either integrally with the stated components or on a plate of durable material securely fixed to that component, as follows:

(a) on wedge gate type hydrant valves:

(i) in addition to the marking requirements of BS 5163, the direction of valve opening on the gland or upper part of the hydrant.

 

 

 

(b) on duckfoot bends:

(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the date of the standard

(ii) the material designation of the body, for grey cast iron „CI., or for spheroidal graphite cast iron „SG.

(c) on screw–down type hydrants:

(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the date of the standard

(ii) the material designation of the body, for grey cast iron „CI., or for spheroidal graphite cast iron „SG.

(iii) the direction of valve opening on the gland or upper part of the hydrant

(iv) if loose valve mark „LV. or „.Loose.

(v) the manufacturer.s name or trade mark

(vi) the identification number (the reference used by the manufacturer allowing identification for the supply of spares, etc)

(d) on screwed outlets:

(i) the number of the standard to which the hydrant conforms (i.e. BS 750) and the date of the standard.

 

11 Class, type, manufacture, workmanship, coating and design features of surface box covers and frames shall be in accordance with BS 750.

12 Surface box covers and frames shall be tested in accordance with the relevant provisions of BS 750. Provision shall be made for a certificate to be made available which certifies that samples from each production lot from which the delivery is made up comply with the requirements of BS 750.

13 Surface box covers shall be clearly marked by having the words “FIRE HYDRANT” in letters not less than 30 mm high, in English and Arabic, cast into the cover. The cover and frame shall have clearly cast thereon the following;

(a) the number of the standard to which the hydrant conforms (i.e. BS 750)

(b) the date of the standard

(c) the grade of the cover and frame.

 

4.6 PIPES AND FITTINGS

 

4.6.1 General
1 Pipes shall be UL listed and FM approved. They shall be exterior galvanized steel to ASTM A 135 with a working pressure of 14.5 bar. Couplings may be of the rolled groove type or the mechanical locking type (push-on). Pipe end preparation for the mechanical locking type couplings will be in accordance with the manufacturer.s recommendations.

2 Fittings shall be UL listed and FM approved. Mechanical grooved pipe couplings and fittings as manufactured by specialised manufacturers shall be used for all stand pipe systems.

(a) couplings shall be ductile iron to ASTM A 536, or malleable iron to ASTM A 47, with chlorinated butyl gaskets suitable for an operating temperature of 95oC and heat treated carbon steel bolts and nuts to ASTM A 183

(b) fittings shall be malleable iron to ASTM A 47 or ductile iron to ASTM A 536 with grooved or shouldered ends

 

 

(c) flanges shall be malleable iron to ASTM A 47 or ductile iron to ASTM A 536, with a hinged, two-piece design, suitable for opening and engaging the groves, and shall be secured in position with a tight-fitting lock bolt. Cast iron flanges shall comply with ANSI B.16.1 and steel flanges steel shall comply with ANSI B 16.5

(d) valves shall be grooved end design with encapsulated body and disc. Neck design shall readily accommodate insulation. Valves shall have pressure assisted double seal and be capable of 12 bar bubble tight shutoff. Butterfly valves shall be with gear actuator.

 

 

4.6.2 Hangers Supports Anchors and Guide
1 The pipework shall be supported, anchored and guided in order to preclude failure or deformation. The Contractor shall construct and install hangers, supports, anchors, guides and accessories as necessary to the approval of the Engineer. Supports shall be designed to support the weight of the pipe, the weight of fluid and the weight of pipe insulation.

2 Piping shall be securely fastened to the structure without over-stressing any portion of the structure itself. Pipe supports, anchors and guides shall be secured to concrete by means of inserts or if greater load carrying capacity is required by means of steel fishplates embedded in the concrete.

3 Hanger shall be arrange so as to prevent transmission of vibration from piping to building and supports.

4 Pipe hangers and supports shall be furnished complete with rods, bolts, lock, nuts, swivels couplings, brackets and all other components and accessories to allow installation to freely expand and contract.

5 Hangers spacing shall be such that the piping is installed without undue strains and stresses and provision shall be made for expansion, contraction, structural settlement and water-hammer.

6 Supports, clamps and hangers shall be made of galvanized steel, fixed with drilled plugs.

 

4.7 PUMPS

 

4.7.1 General
1 Furnish and install where shown on the drawings one LPCB listed fire pump package composed of both electrical and compression ignition engine driven single stage or multistage centrifugal fire pump complete with motor, control, fittings, jockey pump and speciality accessories necessary to complete the installation in every respect. The complete installation shall be in accordance with the requirements of, and meet with the approval of, the Civil Defence Department and any other authorities having jurisdiction. Centrifugal fire pumps shall have a horizontal shaft with electric motor drive. Jockey fire pumps shall have electric motor drives.

 

 

2 Pumps serving water supply to fire fighting system are normally driven electrically with backup by a compression ignition engine and should always be arranged to start automatically in the event of system operation. In addition, arrangement for starting manually should also be installed. It is important that the electricity supply should always be maintained to the pumping set. It is therefore essential that the electrical connections be such that a power supply is always available for the motor when the switches for the distribution of electrical power throughout the building are cut. Any switches on the power feed to the motor should be clearly labelled, “FIRE PUMP MOTOR SUPPLY -NOT TO BE SWITCHED OFF IN THE EVENT OF FIRE”. Such switches should be of the locking type and should be kept locked on. An indicator lamp should be provided to show continuously that full power supply is available for the motor. Any fuses in the electricity sub-circuit should be of the high rupturing capacity (HRC) type.

 

 

4.7.2 Horizontal Fire Pumps
1 Pumps shall be horizontal fire pumps as indicated, factory assembled and tested. The capacity and electrical characteristics shall be as detailed elsewhere in the Project Documentation.

2 The pumps shall be capable of delivering not less than 150% of the rated flow at not less than 65% the rated head.

3 Pumps shall be hydrostatically tested at the factory and run tested pump prior to shipment. The hydrostatic test shall be at 150% of shut off head plus suction head but shall not less than 1725 kPa.

4 The pump shall meet or exceed 75% efficiency at design point.

 

 

4.7.3 Construction
1 They shall have cast-iron pump casing with suction and discharge flanges machined to ANSI B16.1 dimensions, of size and pressure rating detailed in the Project Documentation with a red paint finish.

2 Each pump shall be capable of continuous operation without producing noise in excess of hydraulic institute and OSHA guidelines.

3 Pump casing shall be close grain cast iron with a replaceable bronze case wear ring. The pumps shall be of the back pull out design so that the rotating element can be removed from the casing without disconnecting the suction or discharge piping. Full flange connections shall be integrally cast with the volute. Pump impeller shall be of cast bronze material and shall be statically and dynamically balanced. Impeller diameter shall be trimmed for the specified design conditions.

4 The pump shall be mounted on a heavy duty CI bearing frame.

5 The shaft shall be of stainless steel Grade 316 S31 to BS 970 Part 1.

6 The pump bearing shall be of the permanently sealed type designed for an L10 life of at least 50,000 hours in accordance with BS 5512 and requiring no external lubrication.

7 The pump shall be connected to drive motor by a flexible coupling capable of withstanding all torsional, radial and axial loads.

 

 

4.7.4 Fittings
1 The Contractor shall provide the following accessory fittings:

(a) eccentric tapered suction reducer

 

 

(b) concentric tapered discharge reducer

(c) hose valve test head

(d) hose valve with caps and chains.

(e) pumps casing relief valve

(f) ball drip valve

(g) suction and discharge pressure gauges

(h) mains relief valve

(i) strainer (waste cone)

 

 

4.7.5 Electric Motors
1 Electric motors for pumps shall be horizontal, foot mounted, ball bearing, induction motor with open drip-proof enclosure. The motor shall be mounted on the same steel base as the pump and connected to the pump with a flexible coupling. The coupling shall be protected by a coupling guard. The pump and motor shaft shall be aligned prior to shipment. The pump motor current will not exceed the full load ampere rating under any conditions of pump load. Pump motor shall be suitable for 415/3/50 and 2900 RPM, class “F” insulation, 50oC ambient temperature indoor.

 

 

4.7.6 Compression Ignition Engine
1 1 Engine for fire pump shall be horizontal shaft, in-line, turbocharged, four stroke, liquid cooled, compression ignition type. The motor shall be mounted on the same steel base as the pump and connected to the pump with a flexible coupling. The coupling shall be protected with a coupling guard. The required pump horsepower shall not exceed the rated motor horsepower rating under any conditions of pump load. Accessories shall include 24V dc starting batteries, charging system, dual starting contactors, fuel filters, canister type air cleaner, fuel storage tank, cooling system heat exchangers, exhaust silencer and piping and engine control panel. Engine accessories shall be suitable for 240 V, single-phase, 50 Hz power supply.

 

 

4.7.7 Controller and Transfer Switch
1 The controller and transfer switch shall be LPCB listed and shall be the combined manual and automatic, across the line type. Control equipment shall be furnished in a steel mounted, drip proof enclosure with front operated circuit breaker and disconnect switch.

2 The circuit breaker shall be rated as approved for continued use.

3 The pressure regulator shall have a range of 0 to 2070 kPa with pressure settings, established at time of testing at the Site. An instantaneous recycling running period timer to prevent to frequent automatic starting of fire pump motor, set to keep the motor in operation for 6 minutes on automatic start, shall be interwired with the pressure regulator.

4 The controller shall be capable of interrupting a short circuit current at least equal to the short circuit current in the controller supply circuit.

 

 

4.7.8 Alarm Panel
1 An alarm panel with visible and audible signals for indication for FIRE PUMP CURRENT FAILURE and PUMP OPERATING shall be installed and connected to the fire pump controller.

 

 

4.7.9 Jockey Fire Pumps
1 Jockey pumps shall be factory assembled and tested with capacities and electrical characteristics as detailed in the Project Documentation.

2 Jockey pumps shall be constructed from with cast iron diffusers and adapter with registered fits to maintain axial alignment. They shall have bronze enclosed impellers, bronze casing rings, bronze base bearing, steel clamp type shaft coupling and stainless steel shaft. The impellers shall be pinned to the shaft to prevent reverse rotation damage and to maintain proper inter-stage lateral setting. They shall incorporate threaded suction and discharge connections, mechanical seals and a cast-iron pump base with drain plug. They shall have a red paint finish.

3 The motor controller shall be LPCB listed and approved for fire pump service. Control shall include a combination type starter with fused disconnect switch, thermal over-current protection and a hand-off automatic selector switch in the enclosure. Control shall also include an adjustable pressure switch with gauge cock.

4 The installation shall come complete with a brass cased pressure gauge with a 100 mm dial on the discharge pipe near jockey pump.

5 The installation shall come complete with a 20 mm relief valve on the discharge line of the jockey pump to relieve excess pressure to floor drains.

6 The installation shall come complete with a controller sensing pipes, not less than 15 mm in diameter with a 15 mm globe valve for testing mechanism of controller.

7 The installation shall come complete with a 85 mm diameter bronze check valves with 85 mm orifice in the clapper or ground-face unions with non-corrosive diaphragm with a 85 mm orifice.

8 The jockey pumps and pump drives shall be installed on vibration isolators in accordance with the manufacturer.s recommendations.

 

 

4.7.10 Field Quality Control
1 Upon completion of installation the Contractor shall perform field acceptance tests to demonstrate that the fire protection pumps comply with requirements of the Project Documentation.

 

4.8 WET RISERS

 

4.8.1 General
1 The wet riser installation shall incorporate an inlet box which shall be constructed from 1.5 mm thick galvanized sheet steel and shall be suitable for recessed mounting, with 3 mm thick x 40 mm wide architrave. The box shall be provided with a hinged, lockable door with a central panel glazed with wired glass and having the words “ WET RISER INLET” in 50mm high red letters on the inside face. The box shall be finished in baked enamel inside with prime coat outside to the required colour, and shall be supplied by an approved manufacture of fire equipment.

2 The wet riser installation shall incorporate inlet breaching which shall be horizontal or vertical pattern with integral spring loaded non-return valve, drain valve and blank cap. Each inlet shall incorporate a 65 mm diameter instantaneous male couplings. The body of the breaching piece shall be fitted in 25 mm gunmetal gate valve for drain purposes, with a plug and chain.

 

 

3 The wet riser installation shall incorporate landing valves which shall be a spindle valve controlled breaching with a 50 mm diameter inlet and 65 mm diameter instantaneous female outlet with blank cap. The chain valves shall be straight or oblique pattern as required, and shall be fixed in the closed position. Each landing valve shall be provided with a 30 m long by 65 mm diameter fire hose lined with coated woven synthetic fire hose as well as a diffuser branch pipe nozzle. The valve, hose and nozzle shall be accommodated in a recessed box supported on purpose made hangers and ready for immediate use. The box shall be generally constructed as for the inlet breaching, but with the words “WET RISER OUTLET” in 50 mm high red letters on the inside face of the glazing.

4 The top of each dry riser shall be fitted with a 25 mm automatic air release valve, brass construction, with internal solid rubber ball.

 

4.9 PORTABLE FIRE EXTINGUISHERS

 

4.9.1 General
1 Fire extinguishers shall conform with the relevant provisions of BS 5423.

2 Fire extinguishers shall be colour coded according to their type. The colour shall be as follows:

(a) red - water

(b) cream - foam

(c) black - carbon dioxide

(d) blue - dry powder

(e) green - halon

3 The types of extinguishers that can be used on a fire is dependent upon the class of the fire. The fire classes and the types of extinguishers that can be used on them is given in Table 4.1. Final selection of extinguisher type shall be in accordance with and to the approval of the Civil Defence Department.

4 The capacity of fire extinguishers shall be as detailed in the Project Documentation.

 

 

Table 4.2
Fire Class and Extinguisher Type
Class
Nature
Example
Extinguisher Type

A
Carbonaceous
Wood, paper, textiles
Water

B
Flammable liquids
Adhesives
Dry powder



Flammable liquid stores
Dry powder or foam




Bitumen boilers, petrol or diesel powdered equipment
Dry powder, foam, carbon dioxide or halon



Cooking range fires
Dry powder, carbon, dioxide or fire blanket

C
Flammable gases
Lpg, acetylene
Carbon dioxide, dry powder or halon

D
Reactive metals
Magnesium, sodium etc.
Dry powder specially developed for particular metals

E
Electrical
Any material where there is a danger of live electricity
Carbon dioxide, dry powder or halon

4.10 FIRE BLANKETS

 

4.10.1 General
1 Fire blankets shall be manufactured from woven glass fabric coated on both sides with white silicon rubber, fully tested in accordance with BS 6575.

2 The blankets shall be supplied in white container suitable for wall mounting. Fire blankets shall be provided in the following standard sizes:

(a) 1000 x 1000 mm

(b) 1250 x 1250 mm

(c) 1500 x 1250 mm

(d) 1800 x 1250 mm

(e) 1800 x 1800 mm

 

4.11 FM 200 SYSTEM

 

4.11.1 System description
1 The FM 200 system shall be sized to provide the required 5% concentration of agent in the space protected. A piping arrangement and nozzle shall convey the agent from the cylinders to the hazard and discharge the agent completely within 10 seconds. The piping and nozzles shall be engineered for the specific flow rates required and calculations shall be supplied with the system layout drawings for review and approval by the Engineer.

2 The system design shall incorporate the capability of fully testing all electrical detection, discharge control, abort, power shutdown, air conditioning shutoff, fire damper, and door closer circuits without discharge of the agent and without disconnecting the agent supply from the system.

3 Installed systems shall be complete with all control wiring for detectors, alarms, door releases, fire damper releases, abort stations, manual pull stations air conditioning and computer equipment shutdown devices, voltage trips and circuit breakers. All wiring, including control circuitry, shall consist of insulation copper conductors installed in metal conduit. The FM 200 alarm and detection system wiring and devices shall conform to QCS Section 23, Part 2, Fire Alarm and Detection Systems.

 

 

4.11.2 Equipment Instruction -Plates
1 The Contractor shall provide engraved instruction plates detailing emergency procedures at each system control panel and at each hazard area manual discharge station/abort switch location. Permanent name plates shall be used in the control panel to identify control logic unit contacts and major circuits.

2 Etched aluminium warning signs shall be provided at all entrances and exits of the protected area. Entrance sign shall read: "WARNING - DO NOT ENTER ROOM WHEN ALARM SOUNDS, FM 200 BEING RELEASED.” Exit sign shall read: “WHEN ALARM SOUNDS, VACATE AT ONCE, FM 200 BEING RELEASED.”

 

 

4.11.3 Basic Pipes and Pipe fittings
1 FM 200 manifold and piping shall conform to the relevant requirements of the latest codes and standards.

2 Pipes shall be black or galvanized steel, schedule 40 for 150mm diameter and smaller, complying with the relevant provisions of ASTM A 106.

 

 

3 Fittings shall be galvanized malleable iron 2070 kPa class complying with the relevant provisions of ASTM A 197; ductile iron 2070 class complying with the relevant provisions of ASTM A 395; or steel complying with the relevant provisions of ASTM A 234. For 20 mm diameter or smaller pipe sizes, 1035 kPa class fittings are acceptable.

 

 

4.11.4 Control Panel
1 The detection and extinguishing components shall be one integrated panel. The power source, for the system shall be two separately fused standard voltage circuits which will be connected to the control panel., The panel out-put shall be 24 Volts DC with a battery operated stand-by which will automatically take over and operate the system for 24 hours in the event normal power is interrupted. When trouble of this kind or within the system occurs, an audible signal as well as the indicating lights shall warn operating personnel. The fire detection and control system shall be comprised of a solid state, low power information processor and associated supervisory and interface circuitry. The system shall provide adequate isolation from external wiring to assure against transient signals causing false alarms. The system shall be optimised for use with graphic annunciation displays.

2 The unit shall include the following functions and logic sequence:

(a) operation of all smoke detection circuits

(b) operation of all agent discharge circuit

(c) operation of all audible (and visual) pre-alarm and alarm signals

(d) provide primary power (and control backup power) for entire system.

(e) provide interconnection to fire alarm and detection system and SCADA control station.

 

 

3 The unit shall include supervision of the following circuitry:

(a) input power status

(b) manual pull station circuits

(c) alarm circuits

(d) abort switch circuits

(e) detection circuits

(f) agent discharge circuits

(g) time delay circuits

4 A set of contacts for connection to pre-action valve shall be provided.

5 Activation of one detector shall activate the general alarm. The alarm shall be a combined horn and strobe (low pulse).

6 Remote annunciation to the buildings security system, and illuminate LED light on graphic annunciator

7 Activation of a cross-zoned detector in the same area shall:

(a) activation and annunciation of pre-discharge alarms. The alarm shall be combined horn and strobe (fast pulse).

(b) energise a time delay mechanism which shall delay release for 30 seconds; the agent shall be released at the end of this time interval unless a deadman - “Agent Hold” (abort switch) is depressed; time delay to reset to 0 seconds when abort switch is depressed, restarting the time delay when released

(c) Shut down the air-conditioning system and close its dampers.

 

 

8 Discharge of the agent shall shut down power to equipment within the protected area.

9 If a manual pull station is energised, the actions detailed in Paragraphs 5, 6, 7 and 8 shall bypass the time delay and overriding abort switch.

 

 

4.11.5 Storage Cylinders
1 The FM 200 cylinders shall be constructed of high strength steel alloy conforming to applicable specifications of the Civil Defence Department. All containers shall be mounted securely in an upright position. Cylinders manifolded together shall be of the same size and weight/capacity. Each cylinder in a multiple cylinder group connected to a manifold shall be fitted with a flexible discharge hose and a manifold check valve. The check valve shall prevent agent loss during discharge should a cylinder be disconnected from the manifold. A mechanical method of actuation shall be provided at the cylinder location for local emergency operation.

 

 

4.11.6 Discharge Valve
1 Operation of the valve shall be by means of differential pressure using the container pressure at the source. The force differential and a metallic spring shall act to hold the valve closed prior to discharge and the force shall reverse upon actuation to open the valve. This reversal shall be accomplished by means of venting the agent through an opening on the container valve. The container valve shall be equipped with a pressure gauge for continuous monitoring of the container pressure safety outlet to automatically relieve pressure build-up.

 

 

4.11.7 Discharge Nozzles
1 Discharge nozzles shall be one piece cast aluminium, have either a 180° or 360° flat fan-shaped discharge pattern and range in orifice sizes from 3 mm to 50 mm in 1 mm increments.

 

 

4.11.8 Pressure Switch
1 This pneumatically actuated switch shall be used to give positive identification of release of the agent in the piping system.

2 The switch shall have one set of normally open and one set of normally closed contacts.

 

 

4.11.9 Smoke Detectors
1 Devices shall be UL listed and FM approved. The minimum contacts rating shall be one ampere for both standard voltage, single phase, 50 hertz, ±10% fluctuation.

 

 

4.11.10 Graphic Annunciator
1 An engraved multi-layer acrylic graphic display showing walls, doors, windows, location of control panel and location of all smoke detectors shall be provided. The number and location of the displays shall be as stated elsewhere in the Project Documentation. Silk screen graphics are not acceptable.

2 Panel colour shall be white with black lettering. Indicators shall be light emitting diodes (LED) in red, yellow or green. All points shall be wired to a labelled terminal strip which is plug compatible to the wiring harness for ease of installation. All graphics shall use a hide-away hinge system that eliminates the need for metal frames and visible screw heads. Back boxes shall be made of 1.5 mm thick steel.

 

 

4.11.11 Battery Backup Power System
1 Battery backup of the entire FM 200 system, including detection, alarm, actuation and supervisory system is required. The backup system must be designed such that upon main power failure, backup power automatically services the system with no delay or interruption of any kind. The battery system must be capable of powering-the system for a period of-not less than 24 hours in a normal standby condition, at the end of which time it shall be capable of operating the entire system in a full alarm condition for period of not less than ten minutes. The trouble horn and light shall be activated to indicate that the system is operating on a battery power.

 

 

4.11.12 Alarm Horn/strobe Combination
1 The alarm horn shall operate on 24 volt polarised DC power to allow supervision of the circuit wires.

2 The alarm horn shall have a minimum sound level of 98 decibels at 3 m.

3 A horn and strobe light shall operate simultaneously from one power supply with flash rate of 1-3 flashes per second with peak light intensity of 800 candlepower.

 

 

4.11.13 Manual Pull Stations
1 The manual pull station shall be provided for the release of the FM 200 in case of an emergency.

2 The unit shall be contained within a metal body having a single pole switch. The unit shall require double action operation.

 

 

4.11.14 Abort Switch
1 The abort switch shall be used where investigation delay is desired between detection and actuation of the system.

2 This switch shall be a momentary contact "dead-man" type switch requiring constant pressure to operate one set of normally open and one set of normally closed contacts on each contact block. Clear operating instructions shall be provided at the abort switch.

 

 

4.11.15 Automatic Fire Dampers
1 Provide press sure trips for automatic fire dampers in air conditioning ductwork servicing hazard areas separated by fire walls. Activation of fire dampers shall occur upon activation of FM 200 discharge. In case of motorised or electro thermal link dampers, pressure trips are not required.

 

 

4.11.16 Basic Identification of Installation
1 Piping System Identification : Bare and insulated piping shall be labelled in accordance with a piping colour code. Lines above ceilings shall have utility name and directional flow arrows stencilled in designated colour. Exposed piping in mechanical equipment room shall be painted with their designated colour, flow arrow to be painted in contrasting colour. Spacing of description and arrow to be 10 m.

2 Underground Piping Identification : Provide continuous underground type plastic marker, located directly over buried line at 150 to 200 mm below finished grade.

 

 

3 Valve Identification : Provide valve tag on every valve in each piping system. Tag shall be brass, 50mm in diameter with utility service and valve number embossed or stamped on it. List each tagged valve in valve schedule for each piping system. Mount valve schedule frames and schedules in machine rooms.

4 Mechanical Equipment Identification : Provide engraved plastic laminate sign or plastic equipment marker on or near each major item of mechanical equipment and each operational device, including main control and operating valves and primary balancing dampers.

5 Install fire protection signs on piping in accordance with requirements of the Civil Defence Department.

 

 

4.11.17 Installation of Pipes and Pipe Fittings
1 The Contractor shall comply with requirements of codes and standards for installation of fire protection piping materials. Install piping products where indicated, in accordance with manufacturer's written instructions, and in accordance with recognised industry practices to ensure that piping systems comply with requirements and serve intended purposes.

2 Co-ordinate with other work as necessary to interface components of fire protection piping properly with other work.

 

 

4.11.18 Pressure Test
1 After portions of the FM 200 Systems work are completed, the work shall be hydrostatically tested in the presence be the Engineer. Five days advance notice of the tests shall be given to the Owner. Furnish all pumps, gauges, instruments, test equipment and personnel required for these tests and make all provisions for removal of test equipment.

2 Piping shall be tested individually by fire suppression zones, with plugs and/or caps in place of nozzles and agent storage containers as follows. A preliminary test of not more than 1500 kPa shall be applied to reveal possible major leaks. After this preliminary test, the pressure shall be raised to 2,000 kPa. If leaks are found, they shall be eliminated by tightening, repair or replacement. On completion of any remedial work, hydrostatic tests shall be repeated until no leakage occurs.

 

 

4.11.19 Flow and Compliance Test
1 The Contractor shall co-ordinate and schedule flow tests at a times agreed with the Engineer. The Contractor shall notify the Engineer as to the time of flow and compliance tests a minimum of two weeks In advance of any such tests.

2 The Contractor shall provide all test equipment necessary to test and demonstrate that the FM 200 Systems satisfactory complies with the Project Documentation requirements. The flow and compliance test report shall include recordings of the following data:

(a) verification of status; for each item of equipment, alarm signalling, and zone barrier closure device prior to the test and at each stage of FM 200 Alarm, including abort and reset to the manual mode

(b) discharge time; time period to complete discharge by means of digital timing devices

(c) concentration; use thermal conductivity recording gas analysers with a minimum of three simultaneous recording points. Concentrations shall be recorded through entire holding time

3 Complete data shall be recorded for each fire suppression zone per the following scenario description:

 

 

(a) Conditions Normal; simulate an occupied facility, and verify status of device and equipment, using test lights on valves in lieu of pressurised agent storage containers

(b) Stage I FM 200 Alarm; activate a random smoke detector by canned smoke or similar agent and verify status of devices and equipment.

(c) Stage II FM 200 Alarm; activate another random smoke detector by canned smoke, or similar agent; after alarm, activate abort mode and verify status of devices and equipment

(d) Manual Mode; cancel the FM 200 timed release period logic by activated the key operated reset, and verify status of devices and equipment.

(e) Stage III FM 200 Alarm; activate a manual discharge station and verify status of devices and equipment.

(f) Conditions Normal; simulate an occupied facility and verify status of devices and equipment with pressurised agent storage containers replacing the test lights on valves.

(g) Stage IV FM 200 Alarm; activate random smoke detectors by canned smoke, or similar agent, and allow the FM 200 timed release period logic to discharge the test gas; record times and concentrations.

4 If flow and compliance test indicates a fire suppression zone including related accessory devices and equipment failed to function, or concentrations during holding period were not satisfactory; reschedule another flow and compliance test to demonstrate satisfactory performance after making corrections.

 

 

4.11.20 Painting
1 Priming: All shop-fabricated and factory-built equipment,: devices and apparatus not galvanized, or protected by plating, or a baked enamel finish, shall be cleaned and given one shop coat of paint primer. Any portions of shop coat damaged in delivery, during construction, or prior to finish painting, shall be re-coated.

2 Finish Painting: Do not paint name plates, labels, placards, tags, stainless steel or plated items, valve stems, motor shafts, levers, handles, trim strips, etc. Exposed and visible piping, equipment devices and apparatus in FM 200 Systems shall be ANSI standard colour.

3 Identification: Stencil 40 mm high white enamel block type characters on all items of equipment for identification purposes. Also, stencil a complete system of pipe identification adjacent to each valve and branch-take-off, and at not over 15 m intervals along runs of pipe, with flow arrows at each marking. Pipe identification shall be contrasting colour, either white or red, to the finish coating of the piping

 

 

4.11.21 CAPSULAR TYPE - FIRE EXTINGUISHING AND SUPPRESSION SYSTEM for the MCC/MV panels
1 Supply and install an automatic fixed type fire extinguishing and suppression system using clean agent (People safe gas - FM200 or NOVEC -123 or similar QCD approved) for all the MCC/MV panels.

2 The automatic capsular type fire extinguishing system shall have the required UL (USA)/FM /CE (Europe)/ or LPCB or CSIRO (Austr) and Qatar Civil Defence approvals.

3 The system shall consist in individual capsules installed in each column compartments.

4 The system shall be direct release–low pressure using suitable polymer tubing as fire detection and fire extinguishing delivery system. The tubing shall rupture when exposed to the flame at 100 Degree C.

 

 

5 A local indication shall be provided by means of a pressure gauge for each system. A remote indication shall be provided for each system in the common alarm anunciator panel.

6 The system shall have a common anunciator panel installed in the same electrical room.

7 Common alarm from the capsular system common anunciator panel shall be transmitted to SCADA to indicate that the gas has been released.

8 A lock-off system shall be provided for use when maintenance is carried out and suitable warning notices shall be provided.

9 All control panels (such as but not limited to: MCC , MV panels, PFCC, synchronising DG panels, stand-alone VFD.s and Electronic Soft Starters panels) shall be provided with the above mentioned automatically operated Capsular type fire extinguishing and suppression system.

10 The system shall have successful operation installations in Qatar for a minimum 5 years in substantial number of operational installations in similar applications.

11 The manufacturer of the capsular type fire extinguishing system shall provide the design installation and warranty of the complete capsular type fire extinguishing system.

12 Spares cylinders and components shall be provided in a quantity no less that 10% installed.

13 The system shall include permanent notices to warn the personnel of the presence of the system and to provide instructions on its use and detailing the actions to be taken in an emergency and after the fire has been extinguished.

14 The gas discharged shall disconnect the MCC main incomer, disconnect the AC and shall initiate an alarm in SCADA control Room.

15 The Contractor shall provide written confirmation from the MCC manufacturer of his approval of the Extinguishing design and installation and confirmation that the installation does not contravene any of his MCC design requirements or certifications.

16 A discharge test shall be carried out on site and the Contractor shall provide all test equipment and clean agent as necessary to carry out the site test.

 

 


END OF PART