Share PDF

Search documents:
  Report this document  
    Download as PDF   
      Share on Facebook



1.0Scope of work

1.1 The scope of work shall cover supply, installation, testing and

commissioning of the Fire Fighting System covering the following :

a)Fire pump sets, electric motor and diesel engine driven.

b)Jockey pump sets, electric motor driven.

c)Motor control centre, starters & isolators etc. for the pump sets.

d)Hydrant main system including Courtyard hydrants.

e)Wet riser system including landing valves, hose reels, hose cabinets, sluice valves, non-return valves, Butter fly valves, air-vessels, orifice plates, etc.

f)Fire brigade breaching and Siamese connections.

g)Sprinkler system including electric and diesel engine driven pump sets,

valves, sprinkler heads, flow switches, Installation valve etc.

h)Hand held fire extinguishers and fire buckets.

i)All ancillary items to make the installation complete in all respects and to

meet all requirements of relevant codes and regulations of Fire & Electricity authorities as well as guidelines from Tariff Advisory Committee and Local Building Codes and Regulations.

j)Providing interface for Building Management System for activation of Sprinkler System.

k)Making detailed Drawings of the complete system to meet the intent of the specifications.

l)Submittal of Shop Drawings ( 4 copies) and As-Built drawings (4 Sets) and complete operation and maintenance manuals.

m)Getting necessary approval and NOC from C F O and Local Authorities .



2.1The fire hydrant installation shall conform to and meet with the requirements set out by the latest editions of:

a) IS:1648 - 1961 Code of practice for fire safety of buildings (General) Fire Fighting Equipment and its maintenance.

b) IS:5290 - 1983 Code of practice for installation of internal fire hydrants in multi-storied buildings.

c)Fire Protection Manual issued by TAC


IS 1239

M.S. tubes & tubular fittings


IS 1879

Malleable iron fittings


IS 778

Gun metal gate, globe and check valves.


IS 1537

Vertically cast iron double flanged pipes

Additionally, the contractor shall comply with all regulations and conditions stipulated by the local Fire Authorities. All the equipment for the fire system shall be of the type and make as approved by TAC, and / or other respective authorities; in case of conflict the most stringent specification shall govern. Sprinkler system in the basement shall be for “Ordinary Hazard” class and that in superstructure shall be designed for “Light Hazard” class as per TAC norms i.e. at 9 m2 per sprinkler and 21 m2 per sprinkler respectively.

3.0Fire Pump Sets

3.1The fire pump set shall be totally submersible and direct driven by electric motor and diesel engine with flexible coupling as specified. The pump rating and performance shall conform to the Equipment Schedule and meet the TAC duty requirements.

3.2Pump casing shall be of close grained cast iron with bronze impeller. The shaft sleeve shall be brass or S.S. 304 and the trim shall be brass or bronze.

3.3Pump shall be capable of delivering 150% of the rated capacity at 65% of the rated head and the shut off head shall be not more than 120% of the rated delivery head. The pump casing shall withstand 1.5 times the no- delivery pressure or 2 times the duty pressure whichever is higher.

3.4The electric drive motor shall be totally enclosed squirrel cage induction motor conforming to IS 325-1978 and rated for continuous duty (S1). Motor shall have Class 'F' insulation and enclosure of IP54. Motor rating shall be at least equivalent to HP required to drive the pump at 150% of its rated discharge& Head.


3.5Drive rating shall be based on the largest of the following:

1.Rated pump discharge at rated head.

2.150% of rated discharge @ 65% of rated head.

3Maximum power absorbed by the pump in its operating range i.e. no- delivery to free discharge.

3.6The diesel engine shall be naturally aspirated (non-turbo charged) & electrically started. The engine shall have a speed governor to regulate the rated rpm within 5% of its rated speed. The engine shall be complete with starting batteries of suitable voltage & ampere rating , full-wave selenium rectifier charger, isolator, leads, mounting frame, etc. Engine rating shall be same as for the electric motor. The Diesel engine should be automatically started with 'Auto main failure circuit with the signal from the pressure switch on the discharge line. The proposed System should be explained by a Single Line Diagram.

3.7Pump discharge pressure and selection should be in line with the 'Guidelines for Fire Protection for High Rise Buildings to avoid undue high pressure in wet risers.


4.1The Jockey pump shall be similar to the fire pump.

Capacity of the jockey pump shall neither be less than 3% (with a min. of

180Lpm) or more than 10% of the pump capacity.


5.1The fire and Jockey pumps shall be complete with the following accessories.

1)Suction and discharge eccentric reducers.

2)Pump coupling guard.

3)Common base frame, fabricated mild steel or cast iron.

5.2Each pump shall have independent set of pressure switches. The pressure switch shall be snap action SPDT switch rated 10A @ 220 V operated through a stainless steel diaphragm. The switch shall have a pointer for manual adjustment of set point, and all electrical connections shall be terminated in a screwed terminal connector. The entire unit shall be


encased in a cold drawn steel enclosure. The diaphragm shall be designed for a maximum operating pressure of the System.

5.3Flow switches shall be S.S bellow type SPDT snap acting contacts rated 10 A @ 220 V. The bellow shall be made of S.S , brass or phospher bronze terminated in a screwed terminal connector. The entire unit shall be encased in cold drawn steel enclosure and the maximum operating pressure of the parts in contact with the liquid shall be consistent with the System pressure.

6.0System Operation and Control Panels

6.1The fire pump shall be started automatically on loss of pressure. The operation sequence of the jockey and the fire pumps shall be as follows :

i)Jockey pump shall start when the system pressure drops by 0.35

Kg/cm2 and stop when the system pressure is reestablished, automatically.



The fire pump shall start when the system pressure drops by 1.0



Kg/cm2 and shall continue to run till manually switched off.



Jockey & fire pump starting shall be indicated with a red



indicating lamp.



motor starters shall be direct-on- line with electrically actuated

contactors. The starter shall be complete with ON-OFF push buttons, timers and auxillary contacts and shall be fully automatic. There shall be an indicating lamp with each of the pumps and an ammeter and selector switch with the fire pumps. Fire pump starting shall be annuciated through an electric siren.

6.3The starter along with isolator shall be housed in a 14 SWG M.S. box duly rust inhibited through a process of degreasing and phosphating.

6.4All cabling to and from the pumps to starters and control switches shall be carried out through copper conductor of required size & rating armoured PVC cables of approved makes. Cables shall be laid in accordance with section “M V CABLING”. The pump motors and panels and all non current caring metal parts shall be double earthed in accordance with IS 3043-1966 or as per requirement.


7.0Fire Hydrants & hose reels

7.1Hydrants shall be provided internally and externally as shown on the drawings. Internal hydrants shall be provided at each landing of an escape staircase and additionally depending on the floor area as shown on

drawings. Landing valves shall be single headed gun metal valve with 63 mm dia outlets conforming to IS 5290-1969.External stand post hydrants shall be provided as shown on the drawing & as per requirement of fire brigade. Landing valve shall have flanged inlet and instantaneous type outlets and mounted at 1.0 m above the floor level. Instantaneous outlet for fire hydrants shall be of standard pattern approved and suitable for 63 mm dia. fire brigade hoses. Wherever necessary, pressure reducing orifices shall be provided so as to limit the pressure to 3.5 Kg/Sq. cm at the highest landing level or any other rating as required by the local fire brigade.

7.2 Each staircase landing shall have the following equipment : ( as shown on the drawing )

i)Landing valve.

ii)First-aid hose reel with 30 m long 20 mm dia. high pressure reinforced rubber lined hose & 20 mm dia. gate valve.

iii)2 Nos. of 15 m long 63 mm dia controlled percolation hoses with instantaneous couplings.

iv)One copper branch pipe with bronze rings to take the nozzle at one end and fit into the instantaneous coupling at the other.

v)Hose reel cabinet (as shown on drawings and/or specified).

The first aid hose shall conform to IS:884 and be wound on a heavy duty circular hose reel with a cast iron bracket. The hose shall be permanently connected at one end to the wet riser through a 20 mm G.M. gate valve with necessary hose adopter and a gun metal nozzle at the other end. The reel shall swing out by 270 Deg.

Canvas hoses shall be in two lengths of 15 m each, controlled percolation type with instantaneous couplings, neatly rolled into bundles and held in position with steel brackets. Canvas hoses shall be tested and certified by the manufacturers, to withstand an internal water pressure of not less than 35 Kg/cm2 without bursting. The hose shall also withstand a working pressure of 7 Kg/cm2 without leakage or undue sweating. No part of the floor served shall be more than 15m from the nozzle when the hose is fully extended.


8.0Sprinkler System

8.1The scope of work shall cover supply, installation, testing and commissioning of the sprinkler system covering the following :

1)Sprinkler pumps, electric or diesel driven as per requirement.

2)Jockey pumps.

3)Installation valve/s with motor-gong.


5)Sprinkler piping.

6)Branch flow switches connected to the building fire alarm system.

8.2Sprinkler Pump Sets

The sprinkler pump sets, jockey pumps and accessories shall be identical to fire pump sets, jockey pumps and accessories (Clauses 3.0, 4.0 and 5.0).

8.3Installation valve

The sprinkler system shall incorporate one or more (as shown on drawings) installation valve assemblies comprising :

i)A mains gate valve

ii)IN and OUT pressure gauge

iii)Test connection of adequate size with valve & orifice plate with pressure connections.

iv)Water gong with necessary piping, isolating valve, strainer and drain.

The installation valve shall be straight through type suitable for wet pipe sprinkler systems. Valves shall be of cast iron with gun metal internals and suitable for vertical or horizontal installation. The valve shall be of cast gun metal with neoprene seal and retaining ring and shall incorporate a suitable non-return device to compensate for pressure fluctuations which should not mal-operate the click. The gun metal internals shall provide for smooth waterways for :

1)Water valve through a retard chamber.

2)Test connection and drain.


There shall be two pressure gauges, one for the mains side and another for the installation side. Each gauge shall have pressure damping brass piping with gunmetal gauge and drain.

A test connection of adequate size as approved shall be provided with a shut-off gate valve and orifice plate with pressure connections. The discharge from the test connection outlet shall be led to the nearest sump or drain as directed.

The water motor shall be of cast gun metal body and internals. The valve shall have an associated gun metal gate valve and strainer preceding the water motor. The water motor and gong shall be located on the discharge lead as directed.

Flow switches shall be as specified under ‘Fire Hydrant System’.


9.1Sprinklers shall be thermo-sensitive glass-bulb actuated type and shall be approved for fire fighting duty .

9.2All sprinklers shall be brass castings polished/chrome /white (polyester) unless stated otherwise and rated for 10.54 Kg/sq. cm and factory tested for 3.4Kg/sq. cm. pressure. Sprinklers shall be pendant or side wall type as specified or as per requirement. All sprinklers shall be provided with adjustable escutcheons finished same as the sprinkler heads. Wherever specified sprinklers shall be recessed type.

9.3Temperature classification of sprinklers in each space shall be as per requirement. Sprinklers shall be selected for the coverage as required and ordinarily be 15/10 mm orifice. Wherever this specified size of sprinklers is not adequate, the tenderer shall quote for the appropriate size required.

10.0Sprinkler Piping

10.1All piping shall be M.S. ''C' Class as specified under “Piping for Fire fighting”. Necessary line flushing valves shall be provided as required.

11.0Sprinkler Testing

11.1The entire sprinkler piping shall be tested, with the sprinklers in position, to a hydrostatic test pressure of 10.54 Kg / Sq. cm for a period of 24 hours at the end of which there shall be no loss in pressure.


11.2Test valves in each sprinkler installation shall be opened (with temporary drain connection) and the following observations recorded.

1)Start-up of jockey pump.

2)Start-up of sprinkler pump.

3)Operation of water motor gong.

4)Operation of flow switch in the appropriate branch.

All branches shall be so tested, witnessed & attested by the PMC. All the operating tests shall be carried out in the presence of any local authority, Fire Brigade or Insurance Company officials if so required.

12.0Hydrant Mains


12.1.1Hydrant ring mains shall be in M.S . "C" Class pipes.

12.1.2Valves 65 mm dia and below shall be heavy duty gun metal full- way gate valves or globe valves conforming to IS 778 - 20 Kg/Sq. cm class. Valves shall be tested at manufacturer’s works and ISI stamped. Sluice valves above 80 mm shall be cast iron double flanged, with rising spindle conforming to and stamped to ISI 780

-20 Kg class. Exposed valves shall be provided with wheel for operation keys for sluice valves with tops.

12.1.3Underground mains shall be laid not less than 1000 mm below the

ground level and supported on 1:2:4 concrete pedestals not exceeding 2.0 m centres and held on with galvanised iron clamps to allow for lateral movement due to expansion/ contraction. Underground mains shall be coated and wrapped as per IS10221. Concrete thrust anchors shall be provided at all bends & tees as required by thrust calculations. Backfilling shall be done only after the piping is hydrostatically pressure tested and approved by the engineering incharge. Piping shall be constantly kept clean till tested.

12.1.4All valves shall be housed in brick masonry chambers over 150 mm cement concrete (1:2:4) foundation. The brick walls of the chamber shall be plastered inside & outside with 20 mm cement sand plaster. 1:4 with a floating coat of neat cement. Chambers shall be 650 x 650 mm for depths upto 900 mm & 1000 x 1000


mm for depths beyond. Each chamber shall have a cast iron surface box approved by the local Fire brigade.

12.1.5Piping laid above ground shall be supported on cement concrete (1:2:4) pedestals raising the bottom of the pipe atleast 150 mm over the ground level & held to the pedestals with galvanised clamps. Pedestals shall be made 3.0 m centre to centre & shown on drawings. Cement concrete (1:2:4) thrust anchors shall be provided at all tee-off points & change of direction as required by thrust calculations. Pipes fixed on walls & ceiling shall have galvanised steel brackets.


12.2.1All internal pipes shall, unless otherwise specified be 'C' Class M.S. to IS 1239 using G.S. heavy duty screwed fittings. Flanges shall be provided to mate with valves and other equipment and shall conform to IS 6392. Flanges shall be screwed type, designed for 2.0 N/ pressure.

12.2.2Fittings for sprinkler piping shall be extra heavy duty M.S. screwed type suitable for the pressure encountered in sprinkler piping. Tap-offs from vertical riser to floor piping shall have flange or union connections. Flow switches shall have flanges or unions on both sides.

12.2.3Valves shall be as for external piping.

12.2.4All pipes shall be of approved make and best quality without rust marks. Pipes and fittings shall be fixed in a manner as to provide easy accessibility for repair and maintenance and shall not cause obstruction in shafts, passages, etc. Pipes and fittings shall be fixed truly vertical, horizontal or in slopes as required in a neat workman like manner. Pipes shall be securely fixed to walls and ceiling by suitable supports at intervals specified. Only approved type of anchor fasteners shall be used for RCC ceiling and walls.


12.2.5Pipes shall be adequately supported from ceiling / walls with structural supports fabricated from mild steel structural e.g. rods, channels, angles, & flats generally as shown on drawings. Fasteners shall be shear type anchor fasteners in concrete walls & ceilings & wrought steel spikes of at least 75 mm long in brick walls. Pipe support shall be painted with 2 coats of red oxide

primer & two coats of approved shade enamel paint. Spacing of

pipe supports shall be as follows:


Upto 50 mm

nominal bore

1.7 m

63 mm to 100 mm

nominal bore

2.0 m

Over 125 mm

nominal bore

2.0 m

12.2.6All low point loops in the piping shall be provided with 25 mm gun metal full-way valves with rising spindle for draining the system. All valves shall have screwed brass caps. Likewise 25 mm gun metal air vents shall be provided at all high point loops to prevent air-locking.

12.2.7All exposed piping for fire fighting shall be distinctly painted ‘Fire Red’ shade 536 to IS : 5-1978. Pipes shall first receive two coats of red oxide primer uniformly applied and two coats of oil paint applied thereafter. All pipe support shall be painted black as specified for support & clamps.

13.0Testing & Commissioning

All piping after installation shall be tested for a hydrostatic test pressure of 1.5 times of the System pressure maintained for 24 hours. All joints and valves shall be checked for leaks and rectified and retested. During testing all valves except drain & air valves shall be kept fully open.


Approved list of Materials &Equipments

14.1All materials and equipment shall be of the best type available and shall be to the approval of Fire Brigade and shall be ISI certified /marked wherever applicable.

1.M.S. Pipes

2.Gunmetal/Brass Fittings -


Fire Pumps



Electric Motors



Cables (Armoured)


6.First Aid Hose Reels braided - rubber

7.Synthetic fibre coated canvas - hoses

8.Diesel Engines





Booster Pumps at terrace -


Flow Switches



Butterfly Valve



Control Valve



Sprinkler Heads



Sluice & Non-return Valve-


Pressure Switch



Pressure Gauge



Hydrant Valve



M S Fittings


Tata, Zenith, Jindal.

Newage, Shaha Bhogilal

HBD, Mather & Platt, Kirloskar

Siemens,Crompton Greaves, Kirloskar

CCI, INCAB, Finolex .

Dunlop,Firestone, New Age

New Age, Jayshree

Kirloskar . Ashoka layland, HBD Minimax, New Age , Firex Kirloskar, KSB, HBD

Procicon .Switzer

Audco / C & R

Mather & Platt / HD / De’s Technico HD/Mather & Platt/Grinal

Kirloskar , Zoloto,


Fiebig / H-Guru

Minimax,New Age , Shaha Bhogilal

Guru , Gayatri