fire safety of industrial buildings: electrical generating and

fire safety of industrial buildings: electrical generating and
IS 3034 : 1993
(Reaffirmed 2002)
Edition 3.1
(2005-02)
Indian Standard
FIRE SAFETY OF INDUSTRIAL BUILDINGS:
ELECTRICAL GENERATING AND
DISTRIBUTING STATIONS — CODE OF
PRACTICE
( Second Revision )
(Incorporating Amendment No. 1)
UDC
699.81.725.4 : 621.311 : 006.76
© BIS 2006
BUREAU
OF INDIAN
STANDARDS
MANAK BHAVAN , 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Price Group 8
Fire Safety Sectional Committee, CED 36
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by
the Fire Safety Sectional Committee had been approved by the Civil Engineering Division Council.
A continuous supply of electric power is of primary importance to almost all human activities,
particularly for the industrial sector. Fire or explosion in a power station may completely curtail
supply of electrical power for considerable time in addition to causing extensive property damage
to the building and equipment.
Importance of fire safety for the electrical generating and distributing stations has been
increasingly recognised due to occurrences of several devastating fires in such premises in the
recent past. Therefore, considering the fact that any fire in such occupancies may completely
disrupt the life of the community, seriously hamper several industries served by them and also
may involve replacement of highly valuable equipment, it is necessary that every attempt should
be made to prevent or at least minimize the occurence of fires in these occupancies. Installation of
equipment having built-in safety measures in the premises and judicial suppression or isolation of
fire risks will therefore reduce both the frequency of outbreaks of fire as well as contain its spread
to other areas. Further, with the adoption of suitable fire safety norms with regard to design,
layout and construction of buildings and other structures, choice of materials for construction, etc,
the premises can be rendered more safe from fire risk point of view.
This standard was published in 1966 and revised in 1981. This second revision incorporates
certain modifications based on the suggestions received from various organizations. Some of the
important changes relate to provisions in respect of fire protection for turbo-generator buildings,
switch gear rooms, cable galleries, flammable oil storage, coal handling plants, transformer yards
and such other hazardous areas.
The important fire safety and fire protection requirements for a power plant which should receive
attention are given in this standard. Where necessary, references to relevant Indian Standards
have also been made. Any fire safety measures other than those covered in this standard, if
prescribed in the relevant statutory rules and regulations should also be adhered to. The
Committee responsible for the preparation of this standard is given at Annex B.
This edition 3.1 incorporates Amendment No. 1 (February 2005). Side bar indicates modification of
the text as the result of incorporation of the amendment.
For the purpose of deciding whether a particular requirement of this standard is complied with,
the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded
off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values ( revised )’. The number
of significant places retained in the rounded off value should be the same as that of the specified
value in this standard.
IS 3034 : 1993
Indian Standard
FIRE SAFETY OF INDUSTRIAL BUILDINGS:
ELECTRICAL GENERATING AND
DISTRIBUTING STATIONS — CODE OF
PRACTICE
( Second Revision )
1 SCOPE
This standard lays down the fire safety
requirements regarding building construction,
various process hazards and facilities, storage
areas, etc, pertaining to electricity generating
stations (where electricity is generated from
conventional sources using coal, oil, gas
turbines, diesel generator sets, and the
distributing stations).
e)
f)
g)
NOTE — This standard does not deal with the fire
safety requirements of nuclear power plants and
hydro-electric power stations.
h)
j)
2 REFERENCES
3.3 Apart from mechanical hazards of gas
turbines, the hazards from fire mainly arise
from fuel explosion fires due to leak in the fuel
system or lubricating and seal oil systems.
Surface temperatures of combustible chambers
will be higher than ignition temperature of fuel
and lube oil.
3.4 The distribution stations such as load despatch centres and sub-stations also cause fire
hazards arising from oil-field transformers,
switch gear, cable galleries/tunnels, etc.
The Indian Standards listed in Annex A are
necessary adjuncts to this standard.
3 GENERAL
3.1 The main fire risk areas in a thermal power
station are:
a)
b)
c)
d)
e)
f)
g)
h)
j)
basement floor immediately beneath the
burner front, and the boiler casing area
above the burner wind box;
Oil filled generator, station unit and
auxiliary transformers, reactor tranformers including associated cooler and
conversation tanks;
Auxiliary boilers, oil burner pumps;
Diesel driven pump/engine units and
their fuel and storage tanks;
Bulk hydrogen stores; and
Hydrogen generation plant.
Control room;
Switch gear room;
Cable ways and races;
Coil and oil storage;
Coal handling system including conveyor
belts;
Transformer houses;
Coal houses;
Coal mills; and
Bunkers.
3.5 The planning for the fire protection scheme
should start right from the design stage of the
plant, thereby ensuring that adequate and
suitable fire protection measures, both active
and passive are incorporated not only while
finalising the plant design itself, but right up to
the completion stage.
3.6 In the fire protection system for the power
plant, due consideration shall be given to the
danger of smoke logging in all locations, in
addition to safeguarding against other likely
gaseous toxic products, the provision of
adequate means of escape shall also be given
due consideration in the interest of life safety.
3.2 The following are also the areas having high
damage potential in a thermal power station:
a) Turbo-generator including lubricating
and jacking oil systems, turbo-generator
supporting structures and floor areas
around the turbine;
b) Hydrogen cooling and seal oil equipment;
c) Boiler feed pump turbine including lubricating and jacking oil services, and
supporting structures including floor
areas around the pump;
d) Burner front areas of the boiler including
fuel oil lighting up headers and pipe work
4 BUILDING CONSTRUCTION AND
RELATED REQUIREMENTS
4.1 The structural elements of all buildings of
an electrical generating/distributing station
shall be of Type 1 construction, complying with
the requirements as given in IS 1642 : 1989.
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IS 3034 : 1993
4.2 Provision for smoke ventilation, preferably
of automatic type shall be made, over the
generator floor to permit escape of heat and
large volumes of smoke likely to be generated.
The requirements of fire venting shall conform
to the provisions contained in relevant Indian
Standards.
n) Between battery rooms and other
adjoining areas, and
p) Between cable galleries of each unit.
4.5 The doors provided in the separation walls
between these fire areas shall be self-closing
fire-check doors of fire rating equal to that of
the fire wall.
4.3 A normal ventilation rate of minimum 2
cycles per hour shall be maintained for large
area turbine halls. For extraction of smoke
from fire, a volume change rate of 12 changes
per hour shall be obtained depending on fire
load, room height, size, etc. In case the start of
the smoke extraction is delayed, the volume
change rate shall have to be increased even up
to 30 changes per hour. Smoke vents of
approved design shall be incorporated in cable
tunnels/galleries, plant rooms, switch board
rooms, etc and provision made for the
attachment of portable extraction unit, if not
already served by a fixed smoke extraction
installation.
4.6 Windows/Ventilators/Glass panels in fire
separation walls (for example, for control rooms
or computer rooms) shall be provided with
preferably clear fire resisting glass panels of
minimum 45 minutes fire resistance or with
automatic fire resistant shutters or automatic
water curtain.
4.7 Cellular or foamed plastic materials (such as
expanded polystyrene, polyurethane foam etc)
shall not be used as interior finish or insulation
in any part of the building. Where interior finish
(wall linings, false ceilings, etc) is unavoidable,
they shall be non-combustible material and of
Class 1 flame spread ( see IS 12777 : 1989).
4.4 To achieve compartmentation, the plant
shall be sub-divided into individual fire areas,
to be maximum extent feasible. Reduce the
spread of fire between such areas and the consequential damage, and also to achieve easy
control and extinguishment of fire. Such subdivision by fire barriers or separation walls of
minimum 2 hours fire resistance shall be
provided in the following cases:
4.8 Air conditioning for the control room shall
provide a pressurised environment to preclude
the entry of smoke in the event of a fire outside
the control room.
4.9 Plastic ducts, including fire retardant types
shall not be used for ventilating systems.
4.10 Provision shall be made in all fire areas of
the plant for removal of all liquids, including
fire fighting water, directly to safe areas. The
drainage facilities shall be adequate to cater to
all of the following emergencies:
a) Where turbine hall houses more than
one unit, a fire barrier/separation wall
shall be provided for each unit beneath
the operating floor in the turbine and
electrical bays;
b) Between TG hall and control room/computer room/instrument room;
c) Between TG hall and electrical switchgear room (unit-wise barriers needed);
d) Between the TG hall and cable galleries
(unit-wise barriers needed);
e) Between TG hall and boiler house;
f) Between TG hall and coal pulverisers;
g) Between TG hall and administrative
building;
h) Between staircases and lift shafts and
the rest of the building;
j) Between storage of flammable liquids
and rest of the building;
k) Between transformer yard/outdoor transformers and other nearby building, in
case a clear distance of 15 m is not
available;
m) Between individual oil-field transformers
containing oil in excess of 2 000 litres in
case clear distance as specified in
IS 1646 : 1982 is not maintained;
a) The spill of the largest single container of
any flammable or combustible liquids in
the area;
b) A minimum flow of 3 600 lpm for fire
fighting operations for at least 20 minutes;
and
c) A maximum design discharge of fixed fire
suppression system operating for a minimum of 20 minutes.
4.11 Floor draining from areas containing flammable or combustible liquids shall incorporate
suitable flame traps or flame arresters,
conforming to IS 11006 : 1984.
4.12 The building or compartment housing the
coal pulverising equipment shall be constructed
in accordance with IS 3595 : 1984. The doorway
openings in the separating walls shall be
provided with sills of not less than 15 cms
height with provision of ramps on either side.
4.13 Switch gear wherever applicable, oil-circuit
breakers and transformers shall be housed
preferably in detached single storey building of
Type 1 construction ( see IS 1642 : 1989 ).
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IS 3034 : 1993
4.14 The building used for storage purposes
shall confrom to the requirements of
IS 3594 : 1991.
generation of thick smoke in a confined space.
Therefore, it is highly essential to ensure
proper ventilation to the bunker area.
4.15 The safety distance separating various
buildings shall be in accordance with IS 1643 :
1988, and the means of exit requirement shall
be in accordance with IS 1644 : 1988.
5.2 Turbo-Generators
5.2.1 While many of the older units are open
design and air cooled, all newer and larger units
are totally enclosed and hydrogen, or water
cooled, or use a combination of liquid and gas for
cooling. The stator winding may be liquid cooled
and the rotor gas cooled by use of hydrogen.
Mechanical of electrical failure of the generators
are possible with resultant fire hazards.
4.16 Distance separating fuel oil storage tanks,
open storage of oil drums, etc shall be in
accordance with the relevant statutory requirements.
4.17 The power station buildings and switch
yards shall be provided with lightning
protection conforming to IS 2309 : 1989.
5.2.2 Some of the air cooled generators are
provided with CO2 extinguishing systems for
the windings. Hydrogen cooling is generally
used for larger machines (capacity exceeding
200 MW). The generator control equipment is
usually provided with devices to monitor the
hydrogen gas pressure and purity. To prevent
gas leakages, oil pressure gland seals (oil seals)
are provided. One of the essential fire safety
requirements in hydrogen cooled generators is
to maintain the H2 purity at about 95 percent
to make explosion risks minimum. However,
there is explosion hazard in the oil system and
also in the event of hydrogen leak through the
oil seals. The hazard of a TG fire incident may
be increased if hydrogen is released in the
event of mechanical failure or severe vibration.
Fire is the most common result of H2 leakage. A
few incidents have occurred where escaping H2
has mixed with air and exploded.
5 POWER STATION FACILITIES
5.1 Coal Storage and Handling
The safety requirements for the coal storage
and handling and other associated equipments
in the power station shall conform to the
provisions
contained
in
IS 3595 : 1984.
However, certain aspects which need special
attention are enumerated below.
5.1.1 The belt conveyor system installed for
handing coal shall preferably be of enclosed
type so as to prevent the escape of dust in the
power house area and these shall be thoroughly
bonded and grounded to minimize static
discharges. Dust collectors should preferably be
located outdoors, wherever necessary.
5.1.2 The conveyor belt shall preferably be of
fire resistant material conforming to IS 3181 :
1978. The openings in the walls and floors
through which the conveyor belt system passes
shall be adequately protected with properly
designed water spray nozzles capable of providing the necessary particle size and pressure, to
cover top and bottom sides of the conveyors near
the openings. These water spray nozzles shall
be controlled by an automatic valve actuated by
fire detectors with a manual override.
5.2.3 The H2 cylinders used for cooling shall be
placed outdoors or in a separate well ventilated
room with exhaust. Where H2 is supplied from a
central storage outside, an emergency shut-off
valve shall be installed on the supply line at an
accessible location which may be operated from
the control room. When H2 cooled generators are
taken out of service for inspection, or repairs, and
during restoration to service, an inert gas, such
as CO2 shall be used to purge the line to prevent
the formation of an explosive H2 air mixture.
5.1.3 Regular inspection with remedial maintenance shall be undertaken to reduce coal
spillage problems and therefore the fire risks.
5.2.4 Periodical checks for H2 leaks shall be
made at the generator and sealing system.
5.1.4 Special care shall be taken against the
risk of fire while belts are being vulcanised or
when welding is being carried out in the
vicinity of conveyors.
5.2.5 Major fire risks in turbo-generators arise
from the leakage or escape of combustible
lubricating and hydraulic fluids contained in
the lubricating or governor seals, and jacking
oil systems. The risk normally extends to the
floor areas which house the lubricating systems
and within the radius of an oil spray pattern
cascading from a failure of bearing oil supply
headers.
5.1.5 The major fire hazard in bunkers is
caused by stagnant coal which may remain for
long periods in bunkers even though they are
continuously in use. The chances of the
stagnant coal catching fire are greatly
aggravated by any draught of air through the
coal in the bunkers. In the event of a fire in the
bunkers, the two main hazards are the
production of highly toxic CO gas and also
5.2.6 A bund wall shall surround and contain
the main labricating oil, jacking and flushing
oil package unit are, to prevent spread of oil to
surrounding floor areas.
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IS 3034 : 1993
covering the entire area. The oil tanks should
also be protected by 38 mm fixed water
monitors at vantage points so as to provide
water for cooling of the tanks.
5.2.7 Concrete or concrete protected steel shall
be used for the supporting structure of turbogenerator units. Exposed steel construction is
acceptable if protected by an automatic deluge
sprinkler system (if, facilities exist for ‘legwetting’).
5.3.5.2 The oil storage tanks should also have
fixed foam fire extinguishing system in
conformity with IS 12835 (Part 1) : 1989.
5.3 Fuel Oil Storage
5.4 Lubrication Oil Risks
5.3.1 The fire safety requirements for all the
fuel oil storage facilities in the power plant
shall conform to the relevant statutory
requirements. Apart from these, some of the
other important requirements are:
5.4.1 The fire risk of the lubrication system of
the turbo generator may be considerably
reduced by using completely separate circuits
for the lubricating system and the control
system. The risks arise from an escape of
combustible lubricants and hydraulic fluids
contained in the systems.
a) Only the minimum quantity required for
day’s requirements shall be stored in the
TG house presmises;
b) All internal storage tanks shall be
provided with a trough or catchpit,
having the same capacity as the tank, for
collecting leakages, which shall be
equipped with a drain pipe, leading back
to the main supply tank or safer areas;
and
c) All above ground storage tanks installed
in-doors shall comply with the following
provisions:
i) The individual capacity of any tank
shall not exceed 10 000 litres;
ii) The aggregate capacity of such tanks
shall not exceed 2 00 000 litres; and
iii) The building/compartment housing
storage tanks shall be segregated
from other building/compartment by
separating walls, and all openings
shall be protected by fire resisting
doors of 2 hours rating and a brick or
concrete liquid-tight ramp at least
150 mm in height.
5.4.2 An oil fire generally follows an escape of
fluid on to hot steam surfaces, impregnation
and absorption of oil into laggings and leakage
into electrical equipment.
5.4.3 The continuous ieakage and absorption of
combustible oils into lagging covering steam
pipes, turbine casing, etc give rise to lagging oil
fires.
5.4.4 The seal oil and the jacking oil systems
are also subject to the same risks.
5.4.5 There shall be arrangement for collecting
leakages of lubricating oil from the distributing
pipe installations by adopting any one of the
following methods:
a) By running the oil lines in steel-lined
trough, specially provided for this purpose; and
b) By employing the double pipe system
that is running the pressurised supply
pipe inside a large pipe acting as a
leakage collector, which shall also act as
a return pipe.
5.3.2 An in-door storage tank shall not be filled
otherwise than from open air through a permanently fixed metal pipe, the inlet of which shall
be fitted with a screwed cap or valve. The fill
pipe, shall extend into the tank so that its
outlet is within 5 cm of the tank bottom.
5.4.6 Where it is not practicable to separate oil
risks from hot pipes and components
sufficiently shielding/deflecting plates and
protection cladding shall be provided at
suitable point and place.
5.3.3 All oil tanks shall be fitted with a vent
pipe leading into open air, the open end being
covered with a standard flame arrester
conforming to IS 11006 : 1984.
5.5 Boiler Plant
5.5.1 The details in respect of the fire safety
aspects of the boiler plant installation and
auxiliary equipment shall conform to the
provision contained in IS 8633 : 1977.
5.3.4 For storage located in-doors, overflow
pipes shall be carried outside the building, and
deliver the oil into a catch pit or other safe
position and the pipe shall terminate in a water
seal container at least 30 cm below the surface
of water.
5.5.2 The fuel delivery to the burners shall be
of proper temperature and pressure as recommended by the manufacturer.
5.5.3 Furnace and Its Control Unit
5.3.5 Outdoor Oil Storage
The manually operated dampers of the boilers
shall be such that they may not close off more
than 80 percent of the internal cross-sectional
area of the smoke pipe.
5.3.5.1 External hydrant system for the power
plant should be extended to cover the outdoor
storage tanks with 63 mm double outlet
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IS 3034 : 1993
5.5.4 The automatically operated dampers of
the boilers shall be of type to maintain safe
damper openings at all times and arranged to
prevent starting of burner unless the damper is
opened at least 20 percent of the internal crosssectional area of the smoke pipe.
6.2 Cables and Cable Galleries etc
6.2.1 The fire protection requirement for cable
galleries, cable runs, etc shall conform to the
provisions contained in IS 12459 : 1988, including the fire protection requirements such as
segregation of cable runs into compartments,
use of fire resistant cables in critical areas and
groups of cables, sealing of penetrations in the
walls and floors by use of fire stops, fire
detection and alarm systems, and the
extinguishing systems.
5.5.5 Readily accessible shut off valves shall be
provided in oil supply line near each oil burner.
5.5.6 Every boiler shall be equipped with the
following safety control devices:
a) Electrical ventilation interlocking mechanisms which would prevent the fuel
pumping circuit from being put into
operation without closing the ventilating
fan-motor circuits;
b) Pre-ventilation time delay which would
prevent the furnaces from being fired
until and unless the furnace had been
ventilated for a pre-determined period of
time;
c) Anti-flooding device to prevent abnormal
discharge of oil at the burner; and
d) Flame failure safeguard which would
automatically cut off flow of fuel in the
event of accidental extinguishment of the
burner flame.
6.3 Transformers
6.3.1 All transformer installations shall comply
with the provisions of IS 1646 : 1982 in addition
to the following:
a) As a protection against excessive damage
due to occurrence of faults, transformers
fitted with conservators shall be protected
with Buchoz Relay;
b) All transformers shall be equipped with
oil temperature alarms or excess current
relay protection;
c) The bushings, insulators, and contacts of
taps changing gears shall be kept
scrupuluosly clean at all times; and
d) The level and dielectric strength of the
transformer oil shall be checked at
periodic intervals, and in the event of
presence of a large quantity of sludge the
oil shall be renewed.
maintenance
work
shall
be
5.5.7 No
undertaken on a furnace without completely
purging the interior of all traces of flammable
gases and vapours and unless satisfactory
results are obtained by checking with a
cumbustible gas indicator (explosive meter).
6.3.2 In addition to the usual cable clamps
above floor level, cables shall also be clamped
immediately below floor level. Each cable or
group shall, where possible, be protected by a
pipe or cover of heat resisting material rising to
a height of at least 45 cm above floor level or
terminating just below cable gland, sealed at
the bottom and filled with sand or small
pebbles.
6 ELECTRICAL EQUIPMENT AND
INSTALLATIONS
6.1 General Requirements
6.1.1 The electrical equipment and installations
of the power stations shall conform in all
respects to the relevant guidelines given in
IS 1646 : 1982.
6.3.3 Whenever possible, all jute shavings shall
be removed from cables in switch rooms,
basements and tunnels.
6.1.2 Gasoline, benzene, ether, alcohol and
similar flammable cleaning fluids shall not be
used on energized electrical apparatus. The use
of such flammable cleaning fluids on
de-energized apparatus may, however, be
permitted provided the apparatus is not
energized within half an hour of such use.
6.3.4 Where cables rest on the floor of tunnel or
basements, they shall be separated into groups
by vertical barriers of tile brick, or concrete and
the trenches so formed shall be filled with small
pebbles. Alternatively, the cables may be
separately clamped and each cable run shall be
separated by a minimum clear space of 75 mm.
of
the flammable solvents
6.1.3 None
mentioned in 6.1.2 shall be used in the vicinity
of electrical equipment from which spark may
be received.
6.1.4 Every electrical equipment shall be kept
free of deposits of oil, grease, carbon dust, etc.
6.3.5 The cable shall not be routed near hot
steam pipe, turbine, pulverised coal pipe and
near hot gas ducts. Wherever it is unavoidable
fire resistant cables shall be used.
6.1.5 Each and every electrical equipment shall
be effectively earthed to avoid any flask/spark.
6.3.6 Power cables and control cables shall run
in separate trenches, wherever possible.
5
IS 3034 : 1993
All conductors connecting the supply terminals
to batteries shall have either rubber or tough
compound insulation without tape or braid.
6.4.10 If the source of supply in the mains has
one conductor earthed, the lamps or other
resistances shall be connected on an earthed
lead and the batteries connected direct to earth
conductors.
6.4.11 No celluloid cased storage batteries shall
be allowed for use.
6.4.12 All china clay or other insulators shall
be kept free of dust, and all casing, conducts,
wood or metal work likely to be affected by acid
spray or fumes shall be protected by acid
resisting paint, varnish or compound, All
exposed current carrying metal and terminals
shall be coated with petroleum jelly.
6.4.13 Suitable exhaust fans shall be provided
for the removal of gas from the battery rooms.
Battery rooms shall be provided with
ventilation to limit the concentration of
hydrogen to one percent by volume.
6.4 Battery Room
6.4.1 Motor generator sets and/or convertors or
rectifiers together with necessary switch and
control gear shall be mounted separately
(preferably in separate rooms as far as possible)
and away from the batteries.
6.4.2 The storage batteries in all
equipment, except compact metal
shall be mounted away from
apparatus, in a position free from
shall be well ventilated.
attendant
clad unit
all other
dust, and
6.4.3 The batteries shall stand directly on
durable, non-absorbant and non-conducting
material, such as glass, porcelain or glassed
earthenware. The materials shall rest on a
bench which shall be kept dry and insulated
from earth. If constructed of wood it shall be
slatted and treated with anti-sulphuric enamel.
6.4.4 The batteries shall be so arranged on the
bench that a potential difference exceeding
12 V shall not exist between adjoining cells.
The batteries exceeding 20 V shall not be
bunched or arranged in circular formation.
7 ILLUMINATION
6.4.5 All combustible materials within a
distance of 60 cm measured horizontally shall
be protected with hard asbestos sheets or
similar material. No object shall be suspended
directly over the batteries.
7.1 For effective fire fighting purposes, the
minimum illumination required for all working
places, such as turbine houses etc is 100 lux,
and for control rooms is 150 lux.
8 FIRE PROTECTION MEASURES
6.4.6 The charging circuit shall be provided
with double or triple pole switches and fuses.
Where a motor generator is employed, the
motor shall be provided with double or triple
pole switches and fuses and automatic battery
and cutout shall be placed in the generator
circuit. Any sub-circuit shall be provided with a
fuse rated at not more than 7 ampere in each
live conductor.
8.1 Electrical generating and distribution
stations
come
under
the
occupancy
classification of Industrial Buildings, G-3
( see IS 1641 : 1989 ).
8.2 The extent and nature of the fire protection
measures as well as exit facilities to be provided
will depend on various factors like size and
location of the station, risks involved, availablity
of outside help for major fire fighting. However,
all the power stations, irrespective of their size,
shall provide for adequate the protection/fire
fighting arrangement and exit facilities.
8.3 Generating stations may vary in size from
small municipal stations to large multi-unit
power stations, including super thermal power
stations.
8.4 The modern trend is to locate power station
in relatively remote areas with hardly any
other assisting fire service within reasonable
distance. This isolated location makes it all the
more necessary for power stations to have an
independent full fledged and well maintained
fire fighting service of their own. Further, in
order to enable quick response to any fire
outbreak and to limit the response time to
accepted standards, that is, within 5 minutes, it
is necessary that a well trained and adequate
fire fighting services is available within the
premises.
6.4.7 The charging control panels shall be of
durable, non-ignitable, non-absorbant, non-conducting material and together with rectifiers,
transformers and supports for resistance of
lamps, shall be on a bench which shall be kept
dry and insulated from earth. If constructed of
wood, it shall be slatted and treated with antisulphuric enamel.
6.4.8 If batteries are charged through
resistance or lamps, unless enclosed in metallic
enclosure, shall be at least 60 cm away from the
nearest battery.
6.4.9 All permanent wiring shall be securely
run and protected, against mechanical injury
and efficient terminals or connection shall be
supplied from which connection to batteries
may be made. Rubber insulated wiring or any
other type of combustible insulated wiring, if on
insulators, shall not be run in such a position
that a fire arising at any battery could reach it.
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IS 3034 : 1993
8.5.6 The internal hydrant (landing valves)
shall be provided for protection of the turbogenerator building including turbine operating
floors and basement areas.
8.5 Turbo-Generators and Supporting
Structures
8.5.1 The fixed water spray type protection
system shall be used for controlling a fire
involving large quantities of lubricating oil on
turbine generators. This shall consist of two
systems of water protection, one for areas below
the operating floor of the turbo generator and
designed to extinguish pool fires and also
providing protection against heat generated by
three-dimensional or spray fires. The other is a
water spray system for oil fires at or around the
bearing housings. Fixed CO2 or dry chemical
extinguishing systems have been found to be
inadequate for basic protection of turbogenerator because of the likelyhood of
re-ignition and, further, these extinguishing
media may not be sufficient to cope with a long
duration fire. However, in some cases fixed dry
chemical or CO2 systems backed by water spray
systems should be provided.
8.5.2 Fixed high velocity water spray systems,
designed to discharge a flow of 10 lpm/m2 shall
cover completely all oil systems, oil piping,
pumps, coolers and all similar associated equipments including adjacent floor areas. The water
spray systems shall be divided into convenient
zone, and each zone shall have sufficient number
of projectors to cover the risk adequately. The
number and groups of projection zones are
related to, the size of turbo-generator unit and
its lubricating plant and auxiliaries. Typical
zone arrangements shall cover the following
areas of seal oil systems, coolers and pipe work,
governor gear, excitor, main lubricating tank
and pumps, lubricating oil pipe work, turbo
generator and boiler feed pump, exposed steel
equipment, foundation support legs, rate of rise
fire detectors in accordance with IS 2175 : 1988
shall be provided. The heat detectors shall be
provided at strategic points and arranged to give
early warning of any unusual high temperature
conditions in the area.
8.5.3 Automatic control of the extinguishing
systems in this area is more effective than
manual control. However, manual over-ride
shall also be provided. Zone control deluge
operating valve shall be carefully sited so as to
be operable without fire or smoke hazard to the
operator during a fire. This may be achieved by
careful location of the valve assemblies away
from protection zones, or by enclosures of the
valves in protective cubicles, at the same time
affording the operator a good view of the
protected zones. Access routes to control valves
shall not involve exposure hazards to the
operating persons.
water
spray
systems
shall
8.5.4 The
incorporate isolation facilities so as to enable
periodic testing, maintenance etc.
8.5.5 Normally all cut off valves shall be locked
open.
8.5.7 The hydrant system shall have sufficient
pressure to allow the generation of low
expansion foam from hand branches for
fighting static/running oil fires.
8.6 Turbine Driven Feed Pumps
8.6.1 The fixed high velocity water spray
system shall cover completely all the systems,
oil pipe to the pumps, coolers and other similar
associated equipment including adjacent floor
areas, as for the main turbine. The fire
detection system as well as the water spray
system shall be of the same type as for the
turbo-generator.
8.6.2 To enable fire fighting to be successfully
carried out facilities shall be provided for easy
smoke disposal, by provision of sufficient controllable top and bottom ventillation.
8.6.3 In the event of a fire involving or close to a
turbo-generator or its auxiliaries, it may be safer
to shut down the unit so as to limit the. damage
only to that directly resulting from the fire.
8.7 Hydrogen Equipment
8.7.1 Any hydrogen equipment that is sited in
the turbo generator shall be positioned in such
a way that the area and the equipment are well
ventilated and directed into the open air.
8.7.2 Spark free tools shall be used in an area
where gas may be present.
8.8 Transformers
8.8.1 No fixed fire protection equipment (such
as high velocity spray) is required on transformers below 10 MVA or in the case of oil filled
transformers with oil capacity of 2 000 litres
and below. For all other transformers high
velocity water spray system shall be provided.
This system shall be separately mounted and
designed to take into account the possibility of
a transformer explosion. The water spray
deluge valve house shall be located outside the
transformer fire zones and protected from
radient heat and other fire effects. The
actuation of this system shall be automatic but
manual operating valves shall also be provided.
8.8.2 The high velocity spray system for the
transformers should be well designed to have
adequate coverage of the entire transformer
unit including the conservation tanks, the
bushings and the bottom area. The positioning
of the nozzles should be such to protect all
surfaces of the transformer and to give
discharge rate for the system not less than
10 lpm/m2 of the area to be protected. The
7
IS 3034 : 1993
switch off the pressurised ventilation system
before the centralised extinguishing gas system
is to be put into operation.
automatic high velocity water spray shall be of
pre-active with quartzoid bulbs.
8.8.3 Fire barriers walls shall be provided between transformers where they are less than
15 m apart or where the oil capacity exceeds
2 000 litres.
Table 1 Clearance from Water Spray
Equipment to Live Un-Insulated
Electrical Components
( Clause 8.8.7 )
8.8.4 The transformer shall be so designed as to
permit the safe testing of the fire protection
system, with discharge of water, while on load.
Nominal
Line
Voltage
8.8.5 There shall be arrangements for containment of the spilled oil. For generator transformers and other large transformers the drainage
system as well as storage, pit shall be sufficient
to accommodate at least the total volume of the
oil and an allowable volume of fire fighing
water. The drain pipes shall be provided with
standard type of flame arresters.
kV
8.8.6 The fire protection systems covering the
generator
transformers,
associated
oil
conservator tank and cooler batteries shall be
designed to meet the single risk concept so that
simultaneous deluge over all the three risk
zones is possible.
Nominal
Voltage
to Ground
mm
kV
kV
To 9
110
178
23
13
150
254
34.5
20
200
330
46
27
250
432
69
40
350
635
115
66
550
940
138
80
650
1 118
93
750
1 321
196-230
287-380
114-132
166-220
8.8.7 The electrical clearances for high velocity
spray system shall be as given in Table 1.
500
8.9.1 Gas filled circuit breakers (such as SF6 or
sulphur-hexafluoride) and vaccum breakers are
the least fire hazardous as compared to the oil
breakers or air-blast breakers. Hydrant protection shall be in close proximity to these risks.
Minimum
Clearance
To 15
161
8.9 Switch Gear
Design BIL
500-700
290
290-400
900
1 600
1 050
1 930
1 175
2 210
1 300
2 489
1 425
2 769
1 550
3 048
1 675
3 327
1 880
3 607
1 925
3 886
2 100
4 267
2 300
4 674
NOTES
8.9.2 For an enclosed switch gear room automatic Clean Agents or CO2 total flooding
extinguishing system is considered preferable
to water spray. Switch rooms shall be provided
with controllable ventilators.
1 BIL values are expressed as kilovolts (kV), the
number being the crest value of the full wave impulse
test that the electrical equipment is designed to withstand.
2 When the design BIL is not available, and when
nominal voltage is used for the design criteria, the
highest minimum clearance listed for this group shall be
used.
8.9.3 All cable entries in the switch gear room
shall be effectively sealed by use of fire stops
( see IS 12459 : 1988 ).
8.9.6 Smoke detectors of ionisation and optical
types shall be employed in the switch gear
rooms on cross-zoning principle with suitable
time delay devices incorporated. Proven
intelligent,
micro
processor
based
detection/suppression
system
shall
be
preferred.
8.9.4 All switch gear rooms shall be kept clear
and free from any accumulated debris or flammable material.
8.9.4.1 The following 6.6 kV and 415 V switch
boards may preferably be housed in separate
rooms:
8.9.7 Fixed automatic gaseous extinguishing of
local application type shall be ideal in the
switch gear system.
a) Unit switch boards (with separate room
for boards of each unit),
b) Station switch boards, and
c) Unit switch boards.
8.10 Control Room
8.10.1 For control room of Class I and II of
power generating units as well as distribution
stations shall have fire barrier/separation walls
between the main TG hall/any other adjacent
8.9.5 Switch gear rooms shall be pressurised by
the ventilation system to prevent ingress of
dust. Suitable interlocks shall be provided to
8
IS 3034 : 1993
room. The control room shall have 2 hours fire
resistance with smoke stock fire check doors of
the same rating.
8.10.2 All cable entries/openings in the control
room shall be effectively sealed.
8.10.3 The room shall be kept clear and free of
any waste material whenever glass panels are
provided, it shall be of clear fire resisting glass
having minimum 45 minutes fire resistance or
fitted with automatic resistant shutters/
automatic water curtain.
8.10.4 The AC system shall be automatically
switched off before. the extinguishing system is
put into operation.
8.10.5 Smoke detectors of ionisation and optical
types shall be provided in the Control room on
cross-zoning principle with suitable time delay
devices incorporated. Proven intelligent, microprocessor based detection/suppression system
shall be preferred.
8.10.6 ‘ON’ and ‘OFF’ type sprinkler system,
CO2 or Clean Agents extinguishing system
shall be provided for control room. In this case
‘ON’ and ‘OFF’ type should be preferred.
8.11 Cable Galleries
8.11.4 Smoke detectors of ionisation and optical
type shall be provided in the control room on
cross-zoning principle with suitable time delay
devices. Proven intelligent micro processor
based detection/suppression system shall be
provided. Alternatively heat detectors of linear
type covering all the cable racks/trenches shall
be installed.
8.11.5 Where high expansion foam or gas
exgtinguishing systems are used, the system
shall actuate only after all persons inside have
been evacuated.
8.11.6 Self-contained BA sets shall be available
for ready use by trained personnel at strategic
points near the entry to the cable galleries.
8.11.7 All cable galleries/tunnels shall be maintained in a neat and tidy conditions. These
shall not be used for storage/dumping of scrap
or any other article including electrical spares.
8.11.8 The means of escape shall be clearly
indicated and all exit ways shall be kept clear.
The controlled access procedure shall be
enforced for the cable galleries, tunnels etc for
employees on regular work or inspection duties.
8.11.9 Floors of all cable galleries/tunnels shall
have a slope of suitable gradient leading to a
sump of adequate capacity for collecting
seepage and other water including water used
for fire fighting. An automatic sump pump of
suitable capacity shall be installed at each
sump to pump out the water to the surface
drain.
8.11.1 The experience of Power Station cable
fires had been that in many cases, several
units, if not the whole station, got seriously
affected by a single fire. PVC is not easily
flammable but burns freely in fairly high
temperature conditions producing copious
quantities of dangerous fumes and gases
including HCL gas. These gases are toxic and
highly corrosive. The cable galleries, separating
rooms etc shall be provided with facilities for
ventillation and means for controlling it from
outside. Apart from the need to clear smoke
and toxic gases in the event of a fire,
ventillation may be necessary for temperature
control of the galleries on areas.
8.11.2 To limit the spread of fires along cable
ways fire barriers shall be installed in accordance
with the requirements of IS 12459 : 1988.
8.11.3 Access and exit ways large enough to
allow a man wearing breathing apparatus and
carrying other fire fighting equipment to pass
through shall be provided. The distance
between such exit ways shall not exceed 30 m
in the cable runs. The cable galleries or runs
shall be provided with automatic fixed fire
fighting installations using water, CO2 Clean
Agents or Water Mist or high expansion foam.
However, water spray sprinkler system is
generally preferred. The design of sprinklers
and projectors shall ensure that no rack or
cable is left unprotected. Automatic sprinkler
system for the cable galleries shall be designed
for a density of not less than 12 lpm/m2 over
area of 232 m2. Water spray system shall have
the same density.
8.12 Coal Storage and Handling Equipment
8.12.1 Coal handling plant shall be provided
with an early warning fire detection system for
moving and stationery fire detectos such as rate
of rise/infra-red/linear heat detectors/optical
beam should be adopted.
8.12.2 The fire protection measures for open
storage of coal and coal handling equipment, as
prescribed in IS 3595 : 1984 shall be provided.
In addition, the following measures shall also
be complied with.
8.12.2.1 After determining the location and
extent of a fire in a coal storage yard, the coal
should be dug out and the heated coal removed.
Moisture accelerates oxidation, and therefore it
has got to be ensured that the seat of the fire is
attacked. For this, the use of Extended Branch
Pipe ( see IS 11101 : 1984 ) shall be helpful.
8.12.2.2 Caution has to be exercised while
applying extinguishing water jets on coal and
coal handling equipment to avoid raising of a coal
dust cloud which may result in a dust explosion.
8.12.2.3 For enclosed structures adequate
explosion venting provision shall be made.
9
IS 3034 : 1993
been stopped and the electrostatic precipitator
has been shut-down and de-energised, the
precipitator doors may be opened and water
jet/spray directed as required.
8.15 Gas Turbine Generators
8.12.2.4 Static electricity hazards shall be
minimised by the permanent bonding and
grounding of all equipment including conveyor
belts, pulley idlers, motor drives, etc.
8.12.2.5 Automatic sprinkler system shall be
designed for a minimum of 10 lpm/m2 density
over 232 m2 area. Water spray system shall
have the same density.
8.15.1 Certain areas of the turbine operate at
high temperature and have slow cooling rate
after shut-down. Surface temperature of the
combustion chamber will be higher than the
ignition temperature of fuel and lube oil.
8.15.2 The lubricating and hydraulic seal oil
systems require similar type of fire protection as
in the case of steam turbine driven generators.
Isolated installations may be protected with an
automatic sprinkler water spray system.
8.15.3 Where the generator is installed in an
enclosure, a CO2 system may be provided.
8.15.4 In gas turbine generator and accessory
compartments, to extinguish fires in electrical
equipment by CO2 system, the rate of discharge
shall be such that a 34 percent concentration is
attained within one minute after actuation, and
30 percent concentration shall be maintained
throughout the deceleration period but not less
than twenty minutes. All metal surfaces shall
be cooled to below auto-ignition temperature of
the oil. The minimum concentration as
mentioned above shall be achieved after taking
into account the possible leakage.
8.15.5 The fuel system shall be inter-locked
with automatic fire extinguishing system so
that the fuel supply is automatically shut off
upon operation of the fire extinguishing system.
8.15.6 The emergency shut down controls shall
provide tripping arrangement for over-speed,
excessive vibration, flame-out and high exhaust
temperature.
8.16 Water Supplies for Fire Fighting
8.12.2.6 Conveyors that are below grade or
enclosed present special hazards for fire
fighting, and need to be maintained properly.
8.12.2.7 The actuation of detection system shall
automatically shutdown the conveyor belts in
the area involved.
8.12.2.8 On detection of a fire dust collectors
and fans shall automatically shut-down.
8.12.2.9 Carbon monoxide (CO) gas detection
system shall be desirable for pulverizers to give
early warning about conditions leading to fires
and explosions.
8.12.2.10 The planed hydrant system should
cover the coal storage and handling areas/
equipments also. The escape route in overhead
conveyor system, adequate means of escape
shall be provided particularly in long enclosed
conveyor belts. In the later case, exit doors shall
be provided at intervals of not greater than
50 metres, fitted with escape rungs, which
would enable persons inside the closed conveyor
system to escape in case of fire/explosion.
8.13 Boiler Plant Fire Protection
8.13.1 Boiler furnaces shall be protected with
automatic sprinkler water spray, foam or foam
water sprinkler systems covering the burner
front oil hazard.
8.13.2 Boiler furnaces and boiler front areas
shall be provided with automatic fire detection
systems based on rated type fire detection
system in accordance with IS 2175 : 1988.
8.16.1 The water supplies for fire fighting for
Power Stations shall by and large, conform to
the provisions contained in IS 9668 : 1990 and
internal Hydrant System to IS 3844 : 1989 and
External Hydrant System to IS 13039 : 1991.
In addition, the following requirements shall
also be taken into account.
8.16.1.1 The water supplies shall be planned on
the basis of the requirement of the largest fixed
fire extinguishing system demand plus the
maximum demand from the hydrant mains of
not less than 3 600 l/m for minimum of 4 hours
duration for power stations falling under the
category of classes 1 and 2, and for a minimum
of 3-hours duration for the lower categories.
Pumping capacity of the water supply system
for fire fighting shall be based on the
requirements mentioned above. It shall be
ensured that no tapping is done from the fire
8.13.3 Boiler front fire protection systems shall
be designed to cover the fuel oil burners and
igniters, adjacent fuel oil piping and cable up to
a 6 m distance from the burner and igniter
including structural numbers and walk-ways at
these levels. The sprinkler systems shall be
designed for a density of 10 lpm/m2 over 232 m2
area. Water spray system shall have the same
density.
8.13.4 Entire boiler plant shall be protected by
wet riser system with landing valves at all levels
and connected to the hydrant water mains.
8.14 Electrostatic Precipitator
8.14.1 Once a fire is detected the ESP unit
should go into emergency shut-down immediately. Once the flow of air and fuel to the fire have
10
IS 3034 : 1993
battery system and shall be designed to have
capability of sufficient power for automatic and
‘dead’ start. In addition, emergency lamps with
adequate illumination shall be provided at
strategic locations which shall automatically
operate on the failure of the mains supply.
fighting mains to meet the requirements of
process units or other services. The water
mains shall be of adequate size as prescribed in
relevant Indian Standards and shall be of
wrought or mild steel (located and wrapped)
pipe [galvanised and ungalvanised/UPVC/GRP/
Centrifugal cast (spun) iron/stainless steel]. If
the mains are laid in high corrosive situations,
it may be desirable to cathodic protection or
coating and wrapping or both, if required.
8.16.1.2 The fire fighting pumps shall be of
automatic starting with manual stopping and
in conformity with IS 12469 : 1988.
8.16.1.3 The main reservoir shall have
replenishment arrangement for complete
re-filling operation which shall preferably be
accomplished automatically.
8.16.1.4 The water mains shall be looped around
the main power block and the pipe sizes shall be
designed to cater to future expansion, needs.
interior
fire
protection
8.16.1.5 The
mains/risers shall be considered as an
extension of the yard main and shall be
provided with at least 2 valve connections with
sectional control valves.
8.16.1.6 For the entire power station area only
‘Branch Pipe Universal’ conforming to
IS 2871 : 1983 shall be provided in the hose
cabinets as spray nozzles having sheet-off capability shall be ideal for use on electrical
equipment.
8.17 Manual Fire Alarm System
9 FIRE PROTECTION FOR POWER
PLANTS DURING CONSTRUCTION
9.1 The potential fire hazards during construction of Power Stations are considerable, and
call for observance of stringent fire precautions.
An above average level of fire protection is
necessary during this phase due to life safety
consideration of the large number of on-site
personnel, high value of materials, and long
duration of the construction period.
9.2 The availability of essential fire protection
equipment, and minimisation of fire risks
during construction activities are particularly
important.
9.3 Construction schedule shall be co-ordinate
so that planned permanent fire protection
systems are installed and placed into services
as soon as possible, at least prior to the
introduction of any major fire hazards.
9.4 Minimum fire detection and fire extinguishing measures shall have to be provided for all
locations where fire hazards are present, like
storage of construction materials, storage of
flammable materials, fire safety of welding and
cutting and other building operations.
9.5 A fire trained supervisor shall be available
at the construction site to ensure that all
essential fire safety precautions are observed.
8.17.1 The entire plant area, including
administrative and other buildings shall be
provided with manual fire alarm system with
call boxes deployed at various strategic
locations. The system shall conform to the
requirements given in IS 2189 : 1988. The
control panels of the fire alarm system shall be
located both in the plant control room as well as
the fire station control room.
8.18 Lightening Protection
9.6 Where practical, the permanent fire
hydrant system for the plant shall be installed
well ahead of the completion of the project so
that fire fighting water supplies shall be
available even during construction period.
Where this is not practicable, a minimum
number of water tanks of not less than 1.25 lakh
litres capacity with replenishing arrangements
shall be available at strategic locations in the
plant area which may be utilised as emergency
water supply for fire fighting even after
commissioning of the plant. A minimum of 2
hours duration water supply for fire fighting
shall be available at the construction site.
8.18.1 Lightening protection for the power
station building and outdoor bulk oil storage
areas shall be provided.
8.19 Emergency Power
8.19.1 All generator units require emergency
power for operation of the turning gear, bearing
oil pumps, seal oil pumps control units, besides
meeting the requirements of emergency
services like emergency lighting of all vital
areas, means of escape, fire fighting pumps etc.
A set of station batteries is a reliable supply for
each load. Separate battery banker shall be
provided for each unit and control centre. In
addition, emergency stand by power is
necessary in the form of diesel generator. These
units will provide backup power to the station
9.7 Portable Fire Extinguishing System
9.7.1 In addition to the fixed water
extinguishing systems, sufficient number of
first aid fire fighting equipment like different
types fire extinguishers shall be available for
development at various fire risk areas as per
IS 2190 : 1992. It is essential that the fire
extinguishers are inspected, maintained in
accordance with IS 2190 : 1992.
11
IS 3034 : 1993
9.8 Maintenance of Fire Protection System/
Equipment
Table 2 Fire Equipment Inspection,
Testing and Maintenance Frequency
Schedule
( Clause 9.8.1 )
9.8.1 All the fire protection system/equipment
or devices shall be inspected and maintained
regularly to ensure for their safe operation at
all times. The suggested schedule for each
inspection, testing and maintenance is given in
Table 2. Proper records of such maintenance
shall be maintained.
Item
WeeklyMonthlySemiannualAnnual
Supervisory
Alarm Circuits
Fire and Smoke
Detectors
Manual Fire Alarms
Sprinkler
Water Flow Alarms
Sprinkler and Water
Spray Systems
Foam Systems
Halogenated
Agents, Chemical
and CO2 Systems
Fire Pumps and
Booster Pumps
Water Tanks and
Alarms
P I V’s and OS and
Y Valves
Fire Hydrants and
Associated Valves
Fire Hose and
Standpipes
Portable Fire Extinguishers and
Hose Nozzles
Fire Bridage Equipment
Fire Doors
Smoke Vents
Emergency Lighting
Radio Communication Equipment
10 REQUIREMENT OF MAJOR FIRE
FIGHTING APPLIANCES/EQUIPMENT
AND MANPOWER
10.1 On account of the reason that the power
stations are generally located in relatively
remote areas with hardly any other assisting
fire service within reasonable distance, it is
necessary for the power stations to be provided
with an independent full-fledged and well
maintained fire service of their own. Quick
response to a fire outbreak by fire fighting
service is vital as it makes a difference between
a small tie or a major fire with catastrophic
loss. In other words, power station fire brigades
shall be in a position to tackle a fire, control
and extinguish it before any damage is done.
10.2 Requirement of Major Fire Fighting
Appliances/Equipments
10.2.1 Major Appliance/Equipment for Power
Stations of Installed Capacity Less than 50 MW
( Class IV Power Stations )
10.2.1.1 There may not be any need for any
major fire fighting appliances for generating
stations of this category provided the station is
located within 8 km from the nearest municipal
fire brigade possessing adequate fire fighting
appliances. In case it is located at a further distance, or if the municipal fire appliances are
not available, a Trailer Fire Pump conforming
to IS 944 : 1979, or a higher capacity Portable
Pump conforming to IS 12717 : 1989 shall be
provided with skeleton fire staff.
X
T
A
T
M/T
M/T
M/T
X
X
A
A
M
M
T
T
X
A
M
T
T
M
X
A
X
X
X
T
M/T
M/T
M/T
X
X
X
M
X
T
X
X/T
T
M/T
T
where
X = Inspection
T = Operational Test
M = Maintenance
A = Alarm Test (Transmitters)
NOTES
1 Testing of these systems should be done where
possible after necessary precautions have been taken to
eliminate any hazardous conditions which would result
from the discharge of the extinguishing agent.
10.2.1.2 The Power Station shall have a
hydrant system, and also at least 3 Static water
tanks deployed at strategic locations, of
minimum 1.25 lakh litres capacity. The
following shall be provided:
2 On systems where flow testing is not practical, a
representative number of nozzles should be removed
and checked for signs of blockage. In these cases the
annual test will consist of a trip test of deluge preaction
valves or valve operations as applicable.
a) The v/m equipment, minimum of 25
lengths of 63 mm dia fire fighting hose of
20 m lengths each (15 lengths of type ‘A’
of IS 636 : 1988, and 10 lengths U/L hose
conforming to IS 4927 : 1992);
b) Branch Pipe Universal, con- — 4 No.
forming to IS 2871 : 1983
c) Foam-making Branches FB — 2 No.
5x
3 This is a test to verify pump operability only.
4 Performance tests to be conducted under load to verify
that the pumps meet design conditions.
5 Valves not locked to be inspected weekly. Valves
locked or electrically supervised to be inspected
monthly.
6 Testing of standpipes to include water flow at highest
elevations.
12
IS 3034 : 1993
d) Foam-making FB 10 x
— 1 No.
e) Mechanical Foam compound
[IS 4989 (Part 1) : 1985]
f) BA sets (Positive Pressure
type)
g) Blower and Exhauster for firefighting as per IS 941 : 1985
h) Water Jel Blankets (Fire
Blankets) (1.80 × 1.50 m)
Water
Jel Blankets (for burns)
j)
(0.90 × 0.75 m)
k) Water Jel Container
— 200 L
10.2.4 For Major Power Stations Having
Installed Capacity Over 200 MW up to 999 MW
( Class II )
The following equipments shall be provided:
— 4 No.
Type of
Appliances
— 2 No.
— 2 No.
— 4 No.
— 1 No.
10.2.2 The above scales of equipment and fire
protection systems shall be equally applicable
to load despatch centres in the grid systems,
and also for major distribution stations (220 kV
substations and abo).
10.2.3 For Generating Stations of Installed
Capacity from 50 MW to 199 MW ( Class III )
Type of
Appliances
No.
1. Foam and CO2 C/T
(Conforming
to
IS 951 : 1987)
2. Water Tender Type
‘B’
conforming
to
IS 950 : 1980
3. Large capacity portable pump conforming to IS 12717 : 1989
4. Portable Water/Foam
Monitors
1
5. B A sets (Positive
Pressure type)
6. High Pressure Charging sets (for B A Sets)
7. Blower and Exhauster for fire fighting,
conforming
to
IS 941 : 1985
8. Water Jel Blankets
(1.80 × 1.50 m)
9. Water Jel Blankets
(0.90 × 0.75 m)
10. Water Jel Container
11. Foam compound
8 sets
Manning
Pattern
Round the
clock
1
Reserve
1
Reserve
2
(No separate
manpower
required)
1. Foam and CO2 C/T
1
2. Dry Chemical Tender
2 000 kg conforming
to IS 10993 : 1984
3. Water Tender type ‘B’
4. High Capacity Portable Pump (conforming
to
IS 12717 : 1989)
5. Portable Water/ Foam
Monitors
1
6. 13.5 m Light alloy
extension ladder with
props
7. B A sets (Positive
Pressure type)
8. High Pressure Charging Set
9. Trailer/Portable
Flood Light Unit
10. Jeep 4 × 4
11. Blower and Exhauster
12. Water Jel Blankets
(1.80 × 1.50 m)
13. Water Jel Blankets
(0.90 × 0.75 m)
14. Water Jel Container
15. Foam Compound
The following equipments shall be provided:
No.
1
1
2
1
Manning
Pattern
Round the
clock
Round the
clock
Reserve
No separate
manpower
required
No separate
manpower
required
18
1
1
1
4
8 No.
16 No.
4 No.
20 000
litres
16. Dry Chemical Powder 1 No.
Trailer
of
150 kg
capacity
17. High
Expansion 1 No.
Foam Generator
1 No. (at HQ)
2 No.
10.2.5 Super Thermal/Power Stations Having
Installed Capacity Exceeding 1 000 MW
( Class I )
4 No.
8 No.
The following equipments shall be provided:
Type of
Appliances
2 No.
1 000
litres
12. Dry Chemical Pow- 1 No.
der Trailer of 150 kg
capacity
13
No.
Manning
Pattern
1. Foam and CO2 C/T
1
2. Water Tender type ‘B’
1
Round the
clock
Round the
clock
IS 3034 : 1993
Type of
Appliances
No.
3. Dry Chemical Tender
1
2 000 kg
4. Emergency
Tender
1
conforming
to
IS 949 : 1985
5. Hydraulic Platform
1
22 m Height (indigenously fabricated)
6. Portable Water/Foam
4
Monitors
7. 13.5 m light alloy ex2
tension ladders
8. Trailer/Portable
1
Flood Light Unit
9. Jeep 4 × 4
1
10. B A sets (Positive
24
Pressure type)
11. High Pressure Charg- 1 set
ing Set
12. Blower and Exhaus- 4 No.
ter
13. Water Jel Blankets 16 No.
(1.80 × 1.50 m)
14. Water Jel Blankets 32 No.
(0.90 × 0.75 m)
15. Water Jel Containers
8 No.
16. Foam Compound
50 000
litres
17. Dry Chemical Powder 1 No.
Trailer
of
150 kg
capacity
18. High
Expansion 2 No.
Foam Generator
has to be ensured that the designated strength
of crew for each shift is available for speedy
turn at all times for quick response to fire calls.
Manning
Pattern
Round the
clock
As reserve
10.3.2 For generating stations of installed
capacity less than 50 MW the following
minimum manpower shall be maintained:
Assistant Station Officer — 1
Leading Fireman (L/F)/
Fireman (F/M)
— 1 (per shift)
As reserve
The norms shall apply for manpower requirements for major substations also.
Reserve
10.3.2.1 In addition to the full time fire fighting
staff, selected members of the security/plant
staff shall have also to be imparted basic
training in fire fighting/fire prevention duties
who may also be utilised for fire fighting duties
in emergency.
10.3.3 For Class III, Class II, and Class I
category Power Stations the manpower
requirements shall be computed as per scales
laid down by the Standing Fire Advisory Council/
IS 6070 : 1983.
10.3.4 In addition to the above, one qualified
fire officer of senior rank shall also be
necessary for each power station, depending
upon the category, as overall incharge of the
Power Station Fire Brigade for ensuring proper
training, control and supervision of the entire
fire fighting staff. He shall also be responsible
for all the fire protection arrangements in the
Power Station.
10.3.5 Considering the large area of Superthermal Power Stations, facilitate quick turn
out it may be necessary to deploy the
operational manpower at two Fire Stations — a
Main Fire Station and a Sub Fire Station, both
having up-to-date communication facilities to
help easy mobilisation in case of emergency.
NOTE — Considering the large area of the Super
Thermal Power Stations and also for facilitating quick
turnouts it may be necessary to deploy the operational
equipment at two fire stations, a main Fire Station and
Sub-Fire Station, both having update communication
arrangement to help easy mobilisation in case of
emergency.
10.4 Fire Stations
10.4.1 Power Stations authorised for full time
Fire Brigades with major fire fighting
appliances shall have well designed Fire
Stations for housing appliances and fire
fighting staff. They shall be so located that the
response time for fire appliances are kept to a
minimum not to exceed 5 minutes. The design of
the Fire Stations shall conform to the Standard
Fire Station requirements as prescribed by the
Standing Fire Advisory Council.
10.3 Requirement of Manpower for
Manning the Fire-fighting Appliances
10.3.1 The manpower requirements has to be
based on the number of fire fighting appliances
to be kept manned round the clock (day and
night). The scales of manpower required for
each type of appliance shall be as per the norms
prescribed by the Standing Fire Advisory
Council of the Government of India and also as
per guidelines given in IS 6070 : 1983. The fire
crew, computed as per the scales prescribed
above shall work in three shifts. A reserve of
1
33 --- percent of the total strength required for
3
shift duties shall also be provided, to cater for
leave, absence, training requirements, etc. it
11 FIRST-AID FIRE FIGHTING
In the entire Power Station area, first-aid fire
fighting equipment like fire extinguishers shall
be deployed. It is essential that these
extinguishers are periodically inspected and
maintained in accordance with the provisions
contained in IS 2190 : 1991.
14
IS 3034 : 1993
12.1.1 The Fire Emergency Orders shall also
contain a Mutual Aid Scheme for mobilising
assistance by way of equipment and trained
manpower from neighbouring units, if available.
12 FIRE EMERGENCY ORDERS
12.1 Each Power Station shall have a Fire
Emergency Plan formulated so as to facilitate
organised actions to be taken in case of fire by
staff at various levels, during day-light hours
as well as night. These orders shall also contain
the instructions on fire prevention measures
and the fire fighting organisation.
12.2 Periodical mock fire drill shall be
conducted so as to check the alertness and
efficiency of Plant staff as well as fire fighting
staff, and records maintained.
ANNEX A
( Clause 2 )
LIST OF REFERRED INDIAN STANDARDS
IS No.
636 : 1988
941 : 1985
944 : 1979
949 : 1985
950 : 1980
951 : 1987
1641 : 1988
1642 : 1989
1643 : 1988
1644 : 1988
Title
IS No.
Non-percolating flexible fire
fighting delivery hose ( third
revision )
Specification for blower and
exhauster for fire fighting
( second revision )
Functional requirements for
1 800 l/min trailer pump for
fire brigade use ( second
revision )
Functional requirements for
emergency (rescue tender) for
fire brigade use ( second
revision )
Functional requirements for
water tender type B for fire
brigade use ( second revision )
Functional requirements for
crash tender for air fields
( third revision )
Code of practice for fire safety
of
buildings
(general):
General principles of fire
grading and classification
( first revision )
Code of practice for fire
safety of buildings (general):
Details of construction ( first
revision )
Code of practice for fire safety
of
buildings
(general):
Exposure
hazard
( first
revision )
Code of practice for fire
safety of buildings (general):
Exit requirements and personal hazard ( first revision )
15
Title
1646 : 1982
Code of practice for fire
safety of buildings (general):
Electrical installations ( first
revision )
2175 : 1988
Specification for heat sensitive fire detectors for use in
automatic fire alarm system
( second revision )
2189 : 1988
Code of practice for selection,
installation and maintenance
of automatic fire detection
and alarm system ( second
revision )
2190 : 1992
Code of practice for selection,
installation and maintenance
of portable first-aid fire extinguishers ( third revision )
2309 : 1989
Code of practice for the protection of buildings and allied
structures against lighting
( second revision )
2871 : 1983
Specification for branch pipe,
universal for fire fighting
purposes ( first revision )
3181 : 1978
Fire resistant conveyor belting for underground use in
coal mines ( first revision )
3594 : 1991
Code of practice for fire safety
of
industrial
buildings:
General storage and warehousing including cold storage
( first revision )
3595 : 1984
Code of practice for fire safety
of industrial buildings: Coal
pulverizers and associated
equipments ( first revision )
IS 3034 : 1993
IS No.
IS No.
Title
3844 : 1989
Code or practice for installation and maintenance of internal hydrants and hose-reel on
premises ( first revision )
4927 : 1992
Specification for unlined flax
canvas hose for fire fighting
( first revision )
4989
Specification for foam con(Part 1) : 1985 centrate
(compound)
for
producing mechanical foam
for fire fighting: Part 1 Protein foam ( second revision )
4989
Specification for foam con(Part 2) : 1984 centrate
(compound)
for
producing mechanical foam
for fire fighting: Part 2 Aqueous film forming foam (AFFF)
4989
Specification for foam con(Part 3) : 1987 centrate
(compound)
for
producing mechanical foam
for fire fighting:Part 3 Fluoro
protein foam
6070 : 1983
Code of practice for selection,
operation and maintenance of
trailer fire pumps, portable
pumps, water tenders and
motor fire engines ( first
revision )
8633 : 1977
Technical requirements for
location of boilers installations and boiler houses
9668 : 1990
Code of practice for provision
and maintenance of water
supplies and fire fighting
16
Title
10993 : 1984
Functional requirements for
2 000 kg dry powder tender
for fire brigade use
11006 : 1984
Flash back arrestor (flame
arrestor)
11101 : 1984
Specification for extended
branch pipe for fire brigade
use
11360 : 1985
Specification for smoke detectors for use in automatic
electrical fire alarm system
12459 : 1988
Code of practice for fireprotection of cable runs
12469 : 1988
Pumps for fire fighting applications
12717 : 1989
Functional requirements of
fire fighting equipment —
High
capacity
portable
pump-set (1 000-1 600 l/min)
12777 : 1989
Fire safety — Flame spread
of products — Method for
classification
13039 : 1991
Code of practice for provision
and maintenance of external
hydrant system
12835
(Part 1) : 1989
Code of practice for design
and installation of fixed fire
extinguishing system: Part 1
Low expansion foam
IS 3034 : 1993
ANNEX B
( Foreword )
COMMITTEE COMPOSITION
Fire Safety Sectional Committee, CED 36
Chairman
Representing
SHRI J. N. VAKIL
Tariff Advisory Committee, Bombay
Members
SHRI K. RAVI ( Alternate
to Shri J. N. Vakil )
DR R. K. BHANDARI
SHRI R. P. BHATLA
SHRI M. M. KAPOOR ( Alternate )
SHRI S. N. CHAKRABORTY
SHRI P. K. MAJUMDAR ( Alternate )
SHRI P. K. CHATTERJEE
SHRI V. K. SHARMA ( Alternate )
CHIEF FIRE OFFICER
SHRI D. PADMANABHA
SHRI G. P. MONNAIAH ( Alternate )
DEPUTY CHIEF ENGINEER (P & D)
EXECUTIVE ENGINEER (P & D)
( Alternate )
SHRI S. K. DHERI
SHRI R. C. SHARMA ( Alternate )
SHRI S. R. DORAISWAMY
SHRI S. N. LAKSHMANNA ( Alternate )
FIRE ADVISER
SHRI P. N. GHOSH
SHRI C. P. GOSAIN
SHRI S. C. GUPTA
SHRI SANJEEV ANGRA ( Alternate )
SHRI M. R. KAMATH
SHRI K. R. EASWARAN ( Alternate )
SHRI V. M. MADGE
SHRI A. B. PHADKE ( Alternate )
BRIJ MALHOTRA
SHRI G. B. MENON
SHRI S. R. NARASIMHAN
SHRI RAJENDRA SINGH ( Alternate )
PRESIDENT
SHRI V. M. RANALKAR
SHRI HARISH R. SALOT
SHRI RAJESH K. SALOT ( Alternate )
SHRI N. L. N. SHARMA
SHRI M. L. KHURANA ( Alternate )
DR T. P. SHARMA
DR GOPAL KRISHAN ( Alternate )
SHRI R. SUNDARARAJAN
SHRI S. K. CHATTOPADHAYAY ( Alternate )
SHRI SUNLL DAS
SHRI R. N. CHACHRA ( Alternate )
SHRI M. S. TYAGI
SHRI P. K. SAKSENA ( Alternate )
SHRI D. VENUGOPAL
SHRI T. V. MADHUMANI ( Alternate )
SHRI Y. R. TANEJA,
Director-in-Charge (Civ Engg)
Institution of Engineers (India), Calcutta
Engineers India Ltd, New Delhi
Tariff Advisory Committee, Madras
Ministry of Defence (DR & DO), New Delhi
Municipal Corporation of Bombay, Bombay
Tata Consulting Engineers, Bombay
Northern Railway, Ministry of Railways, New Delhi
Municipal Corporation of Delhi, Delhi
Ministry of Defence (Engineer-in-Chief’s Branch), New Delhi
Ministry of Home Affairs, New Delhi
In personal Capacity, New Delhi
Central Public Works Department, New Delhi
Lloyds Institution (India) Pvt Ltd, New Delhi
Mather and Platt Ltd, Bombay
The Hindustan Construction Co Ltd, Bombay
State Bank of India, Bombay
In Personal Capacity, Delhi
Central Electricity Authority, New Delhi
Institution of Fire Engineers India, New Delhi
Ministry of Petroleum and Natural Gas, New Delhi
Vijay Fire Protection System Pvt Ltd, Bombay
Bharat Heavy Electricals Ltd, Hyderabad
Central Buildings Research Institute (CSIR), Roorkee
National Thermal Power Corporation Ltd, New Delhi
Metallurgical Engineering Consultants (India) Ltd, Ranchi
Ministry of Labour, Kanpur
Loss Prevention Association of India Ltd, Bombay
Director General, BIS ( Ex-officio Member )
Member Secretary
SHRI HEMANT KUMAR
Joint Director (Civil Engineering), BIS
17
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote
harmonious development of the activities of standardization, marking and quality certification of goods and
attending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any form
without the prior permission in writing of BIS. This does not preclude the free use, in the course of
implementing the standard, of necessary details, such as symbols and sizes, type or grade designations.
Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also
reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no
changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of
Indian Standards should ascertain that they are in possession of the latest amendments or edition by
referring to the latest issue of ‘BIS Catalogue’ and ‘Standards : Monthly Additions’.
This Indian Standard has been developed from Doc : No. CED 36 (4775)
Amendments Issued Since Publication
Amend No.
Date of Issue
Amd. No. 1
February 2005
BUREAU OF INDIAN STANDARDS
Headquarters:
Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002.
Telephones: 323 01 31, 323 33 75, 323 94 02
Telegrams: Manaksanstha
(Common to all offices)
Regional Offices:
Central
: Manak Bhavan, 9 Bahadur Shah Zafar Marg
NEW DELHI 110002
Eastern
: 1/14 C. I. T. Scheme VII M, V. I. P. Road, Kankurgachi
KOLKATA 700054
Telephone






Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022
323 76 17
323 38 41
337 84 99, 337 85 61
337 86 26, 337 91 20
 60

 60
38 43
20 25
Southern : C. I. T. Campus, IV Cross Road, CHENNAI 600113



235 02 16, 235 04 42
235 15 19, 235 23 15
Western : Manakalaya, E9 MIDC, Marol, Andheri (East)
MUMBAI 400093



832 92 95, 832 78 58
832 78 91, 832 78 92
Branches : A H M E D A B A D . B A N G A L O R E . B H O P A L . B H U B A N E S H W A R . C O I M B A T O R E .
FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR.
LUCKNOW. NAGPUR. NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM.
VISHAKHAPATNAM.
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