Is 3034-Fire Safety of Industria Building Elctrical Generating and Distribution Stations

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    Disclosure to Promote the Right To Information

    Whereas the Parliament of India has set out to provide a practical regime of right to

    information for citizens to secure access to information under the control of public authorities,in order to promote transparency and accountability in the working of every public authority,

    and whereas the attached publication of the Bureau of Indian Standards is of particular interest

    to the public, particularly disadvantaged communities and those engaged in the pursuit of

    education and knowledge, the attached public safety standard is made available to promote the

    timely dissemination of this information in an accurate manner to the public.

    !"#$% '(%)

    !"# $ %& #' (")* &" +#,-.Satyanarayan Gangaram Pitroda

    Invent a New India Using Knowledge

    /0)"1 &2 324 #' 5 *)6Jawaharlal Nehru

    Step Out From the Old to the New

    7"#1&"8+9&"), 7:1&"8+9&")Mazdoor Kisan Shakti Sangathan

    The Right to Information, The Right to Live

    !"# %& ;

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    IS 3034 : 1993(Reaffirmed 1998

    Indian StandardFIRESAFETYOFINDUSTRIALBUILDINGS:ELECTRICALGENERATINGANDSTATIONS - CODE OFPRACTICE

    Second Revision )First Reprint MAY 1999

    UDC 699.81.j25.4 : 621.311 : 006.76

    Q BIS 1993BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

    NEW DELHI 110002

    ( Reaffirmed 2002 )

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    Fire Safety Sectional Committee, CED 36

    FOREWORDThis Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by thFire 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 supplof electrical power for considerable time in addition to causing extensive property damage to thbuilding and equipment.Importance of fire safety for the electrical generating and distributing stations has been increasinglyrecognised 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 il)flustries served by them, and also may involve replacement of highly valuableequipment, it is necessary that every attempt should be made to prevent or at least minimize thoccurence of fires in these occupancies. Installation of equipment having built-in safety measures in thpremises and judicial suppression or isolation of fire risks will therefore reduce both the frequency ooutbreaks of fire as well as contain its spread to other areas. Further, with the adoption of suitable firsafety norms with regard to design, layout and construction of buildings and other structures, choice omaterials 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 certainmodifications based on the suggestions received from various organizations. Some of the importantchanges relate to provisions in respect of fire protection for turbo-generator buildings, switch gearooms, cable galleries, flammable oil storage, coal handling plants, transformer yards and such otherhazardous areas.The important fire safety and fire protection requirements for a power plant which should receiveattention are given in this standard. Where necessary, references to relevant Indian Standards have alsbeen made. Any fire safety measures other than those covered in this standard, if prescribed in therelevant statutory rules and regulations should also be adhered to. The Committee responsible for thepreparation of this standard is given at Annex B.For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded off iaccordance with IS 2 : 1960 Rules for rounding off numerical values ( revised). The number osignificant places retained in the rounded off value should be the same as that of the specified value inthis standard.

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    I ndian St andardIS 3034 : 1993

    FIRE SAFETY OF INDUSTRIAL BUILDINGS:ELECTRICAL GENERATING AND

    DISTRIBUTING STATIONS CODE OF PRACTICE/ Second Revision

    1 SCOPEThis standard lays down the fire safety require-ments regarding building construction, variousprocess hazards and facilities, storage areas, etc,pertaining to electricity generating stations( where electricity is generated from conven-tional sources using coal, oil, gas turbines, dieselgenerator sets, and the distributing stations ).

    NOTE - This standard does not deal with the firesafety requirements of nuclear power plants andhydro-electric power stations.2 REFERENCESThe Indian Standards listed in Annex A arenecessary adjuncts to this standard.3 GENERAL3.1 The main fire risk areas in a thermal powerstation are:

    a) Control room;b) Switch gear room;c) Cable ways and races;d) Coil and oil storage;e) Coal handling systembelts;f ) Transformer houses;g) Coal houses;h) Coal mills; andj) Bunkers.

    including conveyor

    3.2 The following are also the areas having highdamage potential in a thermal power station:4

    b)cl

    4

    Turbo-generator including lubricating andjacking oil systems, turbo-generatorsupporting structures and floor areasaround the turbine;Hydrogen cooling and seal oil equipment;Boiler feed pump turbine including lubri-cating and jacking oil services, andsupporting structures including floor areasaround the pump;Burner front areas of the boiler includingfuel oil lighting up headers and pipe work

    4

    f)fit)h)j)

    basement floor immediately beneath theburner front, and the boiler casing areaabove the burner wind box;Oil filled generator, station unit andauxiliary transformers, reactor tranfor-mers including associated cooler andconversation tanks;Auxiliary boilers, oil burner pumps;Diesel driven pump/engine units and theirfuel and storage tanks;Bulk hydrogen stores; andHydrogen generation plant.

    3.3 Apart from mechanical hazards of gasturbines, the hazards from fire mainly arise fromfuel explosion fires due to leak in the fuel systemor lubricating and seal oil systems. Surfacetemperatures of combustible chambers will behigher than ignition temperature of fuel andlube oil.3.4 The distribution stations such as load des-patch centres and sub-stations also cause firehazards arising from oil-field transformers,switch gear, cable galleries/tunnels, etc.3.5 The planning for the fire protection schemeshould start right from the design stage of theplant, thereby ensuring that adequate andsuitable fire protection measures, both activeand passive are incorporated not only whilefinalising the plant design itself, but right up tothe compIetion stage..3.6 In the fire protection system for the powerplant, due consideration shall be.given to thedanger of smoke logging in all locations, in addi-tion to safeguarding against other likely gaseoustoxic products, the provision of adequate meansof escape shall also be given due considerationin the interest of life safety.4 BUILDING CONSTRUCTION ANDRELATED REQUIREMENTS4.1 The structural elements of all buildings ofan electrical generating/distributing station shallbe of Type 1 construction, complying with therequirements as given in tS 1642 : 1989.

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    IS 3034:19934 2 rovision for smoke ventilation, preferablyof automatic type shall be made, over the gene-rator floor to permit escape of heat and largevolumes of smoke likely to be generated. Therequirements of fire venting shall conform tothe provisions contained in relevant IndianStandards.4.3 A normal ventilation rate of minimum2 cycles per hour shall be maintained for largearea turbine halls. For extraction of smoke fromfire, a volume change rate of 12 changes perhour shall be obtained depending on fire load,room height, size, etc. In case the start of thesmoke extraction is delayed, the volume changerate shall have to be increased even up to 30changes per hour. Smoke vents of approveddesign shall be incorporated in cable tunnels/galleries, plant rooms, switch board rooms, etcand provision made for the attachment ofportable extraction unit, if not already servedby a fixed smoke extraction installation.4.4 To achieve compartmentation, the plantshall be sub-divided into individual fire areas,to be maximum extent feasible. Reduce thespread of fire between such areas and the cons-equential damage, and also to achieve easycontrol and extinguishment of fire. Such sub-division by fire barriers or separation walls ofminimum 2 hours fire resistance shall be providedin the following cases:

    a)

    b)cld)f9f)g)43k)

    ml

    Where turbine hall houses more than oneunit, a fire barrier/separation wall shallbe provided for each unit beneath theoperating floor in the turbine and electri-cal bays;Between TG hall and control room/com-puter room/instrument room;Between TG hall and electrical switch-gear room ( unit-wise barriers needed );Between the TG hall and cable galleries( unit-wise barriers needed );Between TG hall and boiler house;Between TG hall and coal pulverisers;Between TG hall and administrativebuilding;Between staircases and lift shafts and therest of the building;Between storage of flammable liquids andrest of the building;Between transformer yard/outdoor trans-formers and other nearby building, incase a clear distance of 15 m is not avail-able;Between individual oil-field transformerscontaining oil in excess of 2 000 litres incase clear distance as specified in IS 1646 :

    n) Between battery rooms and other adjoin-ing areas, andp) Between cable galleries of each unit.

    4.5 The doors provided in the separation wallsbetween these fire areas shall be self-closingfire-check doors of fire rating equal to that ofthe fire wall.4.6 Windows/Ventilators/Glass panels in fireseparation walls (for example, for control roomsor computer rooms ) shall be provided withpreferably clear fire resisting glass panels ofminimum 45 minutes fire resistance or withautomatic fire resistant shutters or automatic(water curtain.4.7 Cellular or foamed plastic materials ( suchas expanded polystyrene, polyurethane foametc ) shall not be used as interior finish or insu-lationin any part of the building. Where interiorfinish ( wall linings, false ceilings, etc ) is un-avoidable, they shall be non-combustible mate-rial and of Class 1 flame spread ( see IS 12777 :1989 ).4.8 Air conditioning for the control room shallprovide a pressurised environment to precludethe entry of smoke in the event of a fire outsidethe control room.4.9 Plastic ducts, including fire retardant typesshall not be used for ventilating systems.4.10 Provision shall be made in all fire areas ofthe plant for removal of all liquids, includingfire fighting water, directly to safe areas. Thedrainage facilities shall be adequate to cater toall of the following emergencies:

    a) The spill of the largest single container ofany flammable or combustible liquids in44

    the area;A minimum flow of 3 600 lpm for firetiih,fing operations for at least 20 minutes;A maximum design discharge of fixed firesuppression system operating for a mini-mum of 20 minutes.

    4 11 loor draining from areas containing flam-mable or combustible liquids shall incorporatesuitable flame traps or flame arresters, conform-ing to IS 11006 : 1984.4.12 The building or compartment housing thecoal pulverising equipment shall be construc-ted in accordance with IS 3595 : 1984. Thedoorway openings in the separating walls shallbe provided with sills of not less than 15 emsheight with provision of ramps on either side.4.13 Switch gear wherever applicable, oil-circuitbreakers and transformers shall be housedpreferably in detached single storey building

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    IS3034:19934.14 The building used for storage purposes confined space. Therefore, it is highly essentialshall confrom to the requirements of IS 3594 : to ensure proper ventilation to the bunker area.1991.4.15 The safety distance separating variousbuildings shall be in accordance with IS 1643 :1988, and the means of exit requirement shallbe in accordance with IS 1644 : 1988.4.16 Distance separating fuel oil storage tanks,open storage of oil drums, etc shall be inaccordance with the relevant statutory require-ments.4.17 The power station buildings and switchyards shall be provided with lightning protectionconforming to IS 2309 : 1989.5 POWER STATION FACILITIES5.1 Coal Storage and HandlingThe safety requirements for the coal storage andhandling and other associated equipments in thepower station shall conform to the provisionscontained in IS 3595 : 1984. However, certainaspects which need special attention are enume-rated below.5.1.1 The belt conveyor system installed forhanding coal shall preferably be of enclosedtype so as to prevent the escape of dust in thepower house area and these shall be thoroughlybonded and grounded to minimize static dis-charges. Dust collectors should preferably belocated outdoors, wherever necessary.5.~2 The conveyor belt shall preferably be offire resistant material conforming to IS 3181 :1978. The openings in the walls and floorsthrough which the conveyor belt system passesshall be adequately protected with properlydesigned water spray nozzles capable of provid-ing the necessary particle size and pressure, tocover top and bottom sides of the conveyorsnear the openings. These water spray nozzlesshall be controlled by an automatic valve actua-ted by fire detectors with a manual override.5.1.3 Regular inspection with remedial main-tenance shall be undertaken to reduce coalspillage problems and therefore the fire risks.5.1.4 Special care shall be taken against the riskof fire while belts are being vulcanised or whenwelding is being carried out in the vicinity ofconveyors.5.1.5 The major fire hazard in bunkers is causedby stagnant coal which may remain for longperiods in bunkers even though they are conti-nuously in use. The chances of the stagnant coalcatching fire are greatly aggravated by anydraught of air through the coal in the bunkers.In the event of a fire in the bunkers, the twomain hazards are the production of highly toxic

    5.2 Turbo-Generators5.2.1 While many of the older units are opendesign and air cooled, all newer and larger unitsare totally enclosed and hydrogen, or watercooled, or use a combination of liquid and gasfor cooling. The stator winding may be liquidcooled and the rotor gas cooled by use ofhydrogen. Mechanical of electrical failure ofthe generators are possible with resultant firehazards.5.2.2 Some of the air cooled generators areprovided with CO, extinguishing systems for thewindings. Hydrogen cooling is generally usedfor larger machines ( capacity exceeding 200MW ). The generator control equipment isusually provided with devices to monitor thehydrogen gas pressure and purity. To preventgas leakages, 011 pressure gland seals ( oil seals )are provided. One of the essential fire safetyrequirements in hydrogen cooled generators is tomaintain the H, purity at about 95 percent tomake explosion risks minimum. However, thereis explosion hazard in the oil system and alsoin the event of hydrogen leak through the oilseals. The hazard of a TG fire incident may beincreased if hydrogen is released in the event ofmechanical failure or severe vibration. Fire isthe most common result of H1 leakage. A fewincidents have occurred where escaping HI hasmixed with air and exploded.5.2.3 The Ht cylinders used for cooling shall beplaced outdoors or in a separate well ventilatedroom with exhaust. Where H, is supplied froma central storage outside, au.emergency shut-offvalve shall be installed on the supply line at anaccessible location which may be operated fromthe control room. When H, cooled generatorsare taken out of service for inspection, orrepairs, and during restoration to service, aninert gas, such as COs shall be used to purgethe line to prevent the formationof an explosiveH, air mixture.5.2.4 Periodical checks for H, leaks shall bemade at the generator and sealing system.5.2.5 Major fire risks in turbo-generators arisefrom the leakage or escape of combustible lubri-cating and hydraulic fluids contained in thelubricating or governor seals, and jacking oilsystems. The risk normally extends to the floorareas which house the lubricating systems andwithin the radius of an oil spray pattern cascad-ing from a failure of bearing oil supply headers.5.2.6 A bund wall shall surround and containthe main labricating oil, jacking and flushing oilpackage unit are, to prevent spread of oil to

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    IS 3034 : 19935.2.7 Concrete or concrete protected steel shallbe used for the supporting structure of turbo-generator units. Exposed steel construction isacceptable if protected by an automatic delugesprinkler system ( if, facilities exist for leg-wetting ).5.3 Fuel Oil Storage5.3.1 The fire safety requirements for all thefuel oil storage facilities in the power plant shallconform to the relevant statutory requirements.Apart from these, some of the other importantrequirements are:

    4 Only the minimum quantity required fordays requirements shall be stored in theTG house presmises;b)

    c)

    All internal storage tanks shall be provi-ded with a trough or catchpit, having thesame capacity as the tank, for collectingleakages, which shall be equipped with adrain pipe, leading back to the mainsupply tank or safer areas; andAll above ground storage tanks installedin-doors shall comply with the followingprovisions:i) The individual capacity of any tankshall not exceed 10 000 litres;

    ii) The aggregate capacity of Isuch tanksshall not exceed 2 00 000 litres; andiii) The building/compartment housingstorage tanks shall be segregatedfrom other building/compartment byseparating walls, and all openings shallbe protected by fire resisting doors of2 hours rating and a brick or concreteliquid-tight ramp at kast 150 mm inheight.

    5.3.2 An in-door storage tank shall not be filledotherwise than from open air through a perma-nently fixed metal pipe, the inlet of which shallbe fitted with a screwed cap or valve. The fillpipe, shall extend into the tank so that its outletis within 5 cm of the tank bottom.5.3.3 All oil tanks shall be fitted with a ventpipe leading into open air, the open end beingcovered with a standard flame arrester conform-ing to IS 11006 : 1984.5.3.4 For storage located in-doors, overflowpipes shall be carried outside the building, anddeliver the oil into a catch pit or other safeposition and the pipe shall terminate in a waterseal container at least 30 cm below the surfaceof water.5.3.5 Outdoor Oil Storage5.3.5.1 External hydrant system for the powerplant should be extended to cover the outdoorstorage tanks with 63 mm double outlet covering

    the entire area. The oil tanks should also beprotected by 38 mm fixed water monitors atvantage points so as to provide water for cool-ing of the tanks.5.3.5.2 The 011 storage tanks should also havefixed foam fire extinguishing system in confor-mity with IS 12835 ( Part 1 ) : 1989.5.4 Lubrication Oii Risks5.4.1 The fire risk of the lubrication system ofthe turbo generator may be considerablyreduced by using completely separate circuitsfor the lubricating system and the controlsystem. The risks arise from an escape of com-bustible lubricants and hydraulic fluids containedin the systems.5.4.2 An oil fire generally follows an escape offluid on to hot steam surfaces, impregnationand absorption of oil into laggings and leakageinto electrical equipment.5.4.3 The continuous ieakage and absorption ofcombustible oils into lagging covering steampipes, turbine casing, etc give rise to lagging oilfires.5.4.4 The seal oil and the jacking oil systemsare also subject to the same risks.5.4.5 There shall be arrangement for collectingleakages of lubricating oil from the distributingpipe installations by adopting any one of thefollowing methods:

    a) By running the oil lines in steel-linedtrough, specially provided for this pur-pose; and

    b) By employing the double pipe system thatis running the pressurised supply pipeinside a large pipe acting as a leakagecollector, which shall also act as a returnpipe.5.4.6 Where it is not practicable to separate oilrisks from hot pipes and components sufficientlyshielding/deflecting plates and protection clad-ding shall be provided at suitable point andplace.5.5 Boiler Plant5.5.1 The details in respect of the fire safetyaspects of the boiler plant installation and auxi-liary equipment shall conform to the provisioncontained in IS 8633 : 1977.5.5.2 The fuel delivery to the burners shall beof proper temperature and pressure as recom-mended by the manufacturer.5.5.3 Fu rnace and I ts Control Uni tThe manually operated dampers of the boilersshall be such that they may not close off morethan 80 percent of the internal cross-sectionalarea of the smoke pipe.

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    163034:1 M35.54 The automatically operated dampers ofthe boilers shall be of type to maintain safedamper openings at all times and arranged toprevent starting of burner unless the damper isopened at least 20 percent of the internal cross-sectional area of the smoke pipe.55.5 Readily accessible shut off valves shall beprovided in oil supply line near each oil burner.55.6 Every boiler shall be equipped with thefollowing safety control devices:

    a) Electrical ventilation interlocking mecha-nisms which would prevent the fuelpumping circuit from being put intooperation without closing the ventilatingfan-motor circuits;b) Pre-ventilation time delay which wouldprevent the furnaces from being fired

    until and unless the furnace had beenventilated for a pre-determined period oftime;c) Anti-flooding device to prevent abnormadischarge of oil at the burner; andd) Flame failure safeguard which wouldautomatically cut off flow of fuel in theevent of accidental extinguishment of theburner flame.

    5.57 No maintenance work shall be undertakenon a furnace without completely purging theinterior of all traces of flammable gases andvapours and unless satisfactory results areobtained by checking with a cumbustible gasindicator ( explosive meter ).6 ELECTRICAL EQUIPMENT ANDINSTALLATIONS6.1 -General Requirements6.1.1 The electrical equipment and installationsof the power stations shall conform in all res-pects to the relevant guidelines given in IS 1646 :1982.6J.2 Gasoline, benzene, ether, alcohol andsimilar flammable cleaning fluids shall not beused on energized electrical apparatus. The useof such flammable cleaning fluids on de+nergizedapparatus may, however, be permitted providedthe apparatus is not energized within half anhour of such use.6.1.3 None of the flammable solvents mentionedin 6.1.2 shall be used in the vicinity of electricalequipment from which spark may be received.6.1.4 Every electrical equipment shall be keptfree of deposits of oil, grease, carbon dust, etc.61.5 Each and every electrical equipment shall

    6.2 Cables and Cable Galleries ate6.2.1 The fire protection requirement for cablegalleries, cable runs., etc shall conform to theprovisions contained in IS 12459 : 1988, includ-ing the fire protection requirements such assegregation of cable runs into compartments,use of fire resistant cables in critical tieas andgroups of cables, sealing of penetrations in thewalls and floors by use of fire stops, 6re detectionand alarm systems, and the extinguishingsystems.6.3 Transformers6.3.1 All transformer installations shall complywith the provisions of IS 1646 : 1982 in additionto the following:

    a) As a protection against excessive damagedue to occurrence of faults, transformersfitted with conservators shall be protec-ted with Buchoz Relay;b) All transformers shall be equipped withoil temperature alarms or excess currentrelay protection;44

    The bushings, insulators, and contacts oftaps changing gears shall be kept scru-puluosly clean at all times; andThe level and dielectric strength of thetransformer oil shall be checked at perio-dic intervals, and in the event of presenceof a large quantity of sludge the oil shallbe renewed.

    6.3.2 In addition to the usual cable clamps abovefloor level, cables shall also be clamped imme-diately below floor level. Each. cable or groupshall, where possible, be protected by a pipe orcover of heat resisting material rising to aheight of at least 45 cm above floor level orterminating just below cable gland, sealed atthe bottom and filled with sand or small pebbles.6.33 Whenever possible, all jute shavings shallbe removed from cables in switch rooms, base-ments and tunnels.63.4 Where cables rest on the floor of tunnelor basements, they shall be separated intogroups by vertical barriers of tile brick, or con-crete and the trenches so formed shall be filledwith small pebbles. Alternatively, the cablesmay be separately clamped and each cable runshall be separated by a minimum clear space of75 mm.63.5 The cable shall not be routed near hotsteam pipe, turbine, pulverised coal pipe andnear hot gas ducts. Wherever it is unavoidablefire resistant cables shall be used.6.3.6 Power cables and control cables shall run

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    IS 3034 : 19936.4 Battery Room6.4.1 Motor generator sets and/or convertors orrectifiers together with necessary switch andcontrol gear shall be mounted separately ( pre-ferably in separate rooms as far as possible )and away from the batteries.6.4.2 The storage batteries in all attendant equipment, except compact metal clad unit shall bemounted away from all other apparatus, in aposition free from dust, and shall be wellventilated.6.4.3 The batteries shall stand directly ondurable, non-absorbant and non-conductingmaterial, such as glass, porcelain or glassedearthenware. The materials shall rest on a benchwhich shall be kept dry and insulated fromearth. If constructed of wood it shall be slattedand treated with anti-sulphuric enamel.6.4.4 The batteries shall be so arranged on thebench that a potential difference exceeding 12 Vshall not exist between adjoining cells. Thebatteries exceeding 20 V shall not be bunchedor arranged in circular formation.6.4.5 All combustible materials within a dis-tance of 60 cm measured horizontally shallbe protected with hard asbestos sheets or simi-lar material. No object shall be suspendeddirectly over the batteries.6.4.6 The charging circuit shall be providedwith double or triple pole switches and fuses.Where a motor generator is employed, themotor shall be provided with double or triple poleswitches and fuses and automatic battery and cut-out shall be placed in the generator circuit. Anysub-circuit shall be provided with a fuse ratedat not more than 7 ampere in each liveconductor.6.4.7 The charging control panels shall be ofdurable, non-ignitable, non-absorbant, non-con-ducting material and together with rectifiers,transformers and supports for resistance oflamps, shall be on a bench which shall be keptdry and insulated from earth. If constructed ofwood, it shall be slatted and treated with anti-sulphuric enamel.6.4.8 If batteries are charged through resistanceor lamps, unless enclosed in metallic enclosure,shall be at least 60 cm away from the nearestbattery.6.4.9 All permanent wiring shall be securely runand protected, against mechanical injury andefficient terminals or connection shall be sup-plied from which connection to batteries maybe made. Rubber insulated wiring or any othertype of combustible insulated wiring, if on insu-lators, shall not be run in such a position thata fire arising at any battery could reach it. All

    conductors connecting the supply terminals tobatteries shall have either rubber or tough com-pound insulation without tape or braid.6.4.10 If the source of supply in the mains hasone conductor earthed, the lamps or otherresistances shall be connected on an earthedlead and the batteries connected direct to earthconductors.6.4.11 No celluloid cased storage batteries shallbe allowed for use.6.4.12 All china clay or other insulators shallbe kept free of dust, and all casing, conducts,wood or metal work likely to be affected byacid spray or fumes shall be protected by acidresisting paint, varnish or compound, All ex-posed current carrying metal and terminals shallbe coated with petroleum jelly.6.4.13 Suitable exhaust fans shall be providedfor the removal. of gas from the battery rooms.Battery rooms shall be provided with ventilationto limit the concentration of hydrogen to onepercent by volume.7 ILLUMINATION7.1 For effective fire fighting purposes, the mini-mum illumination required for all working places,such as turbine houses etc is 100 lux, and forcontrol rooms is 150 lux.8 FIRE PROTECTION MEASURES8.1 Electrical generating and distribution stationscome under the occupancy classification ofIndustrial Buildings, G-3 ( see IS 1641 : 1989 ).8.2 The extent and nature of the fire protectionmeasures as well as exit facilities to be providedwill depend on various factors like size andlocation of the station, risks involved, availablityof outside help for major fire fighting. However,all the power stations, irrespective of their size,shall provide for adequate the protection/firefighting arrangement and exit facilities.8.3 Generating stations may vary in size fromsmall municipal stations to large multi-unitpower Stations, including super thermal powerstations.8.4 The modern trend is to locate power stationin relatively remote areas with hardly any otherassisting fire service within reasonable distance.This isolated location makes it all the morenecessary for power stations to have an indepen-dent full fledged and well maintained fire fightingservice of their own. Further, in order to enablequick response to any fire outbreak and to limitthe response time to accepted standards, that is,within 5 minutes, it is necessary that a welltrained and adequate fire fighting services isavailable within the premises.

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    8.5 Turbo-Generators and Supporting Structures8.5.1 The fixed water spray type protectionsystem shall be used for controlling a fire involv-ing large quantities of lubricating oil on turbinegenerators. This shall consist of two systems Ofwater protection, one for areas below theoperating floor of the turbo generator anddesigned to extinguish pool fires and also provi-ding protection against heat generated by three-dimensional or spray fires. The other is a waterspray system for oil fires at or around thebearing housings. Fixed COs or dry chemicalextinguishing systems have been found to beinadequate for basic protection of turbo-generator because of the likelyhood of re-ignitionand, further, these extinguishing media may notbe sufficient to cope with a long duration fire.However, in some cases fixed dry chemical orCO, systems backed by water spray systemsshould be provided.8.5.2 Fixed high velocity water spray systems,designed to discharge a flow of 10 lpm/ms shallcover completely all oil systems, oil piping,pumps, coolers and all similar associated equip-ments including adjacent floor areas. The waterspray systems shall be divided into convenientzone, and each zone shall have sufficient numberof projectors to cover the risk adequately. Thenumber and groups of projection zones are rela-ted to, the size of turbo-generator unit and itslubricating plant and auxiliaries. Typical zonearrangements shall cover the following areas ofseal oil systems, coolers and pipe work, governorgear, excitor, main lubricating tank and pumps,lubricating oil pipe work, turbo generator andboiler feed pump, exposed steel equipment,foundation support legs, rate of rise fire detec-tors in accordance with IS 2175 : 1988 shall beprovided. The heat detectors shall be providedat strategic points and arranged to give earlywarning of any unusual high temperatureconditions in the area.8.5.3 Automatic control of the extinguishingsystems in this area is more effective thanmanual control. However, manual over-ride shallalso be provided. Zone control deluge operatingvalve shall be carefully sited so as to be operablewithout fire or smoke hazard to the operatorduring a fire. This may be achieved by carefullocation of the valve assemblies away fromprotection zones, or by enclosures of the valvesin protective cubicles, at the same time affordingthe operator a good view of the protected zones

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    IS3034:l993area to be protected. The automatic high velo-city water spray shall be of pre-active withquartzoid bulbs.8.8.3 Fire barriers walls shall be provided be-tween transformers where they are less than 15 mapart or where the oil capacity exceeds 2 000iitresd8.8.4 The transformer shall be so designed asto permit the safe testing of the fire protectionsystem, with discharge of water, while on load.8.8.5 There shall be arrangements for contain-ment of the spilled oil. For generator transfor-mers and other large transformers the drainagesystem as well as storage, pit shall be sufficientto accommodate at least the total volume of theoil and an allowable volume of fire figbing water.The drain pipes shall be provided with standardtype of flame arresters.8.8.6 The fire protection systems covering thegenerator transformers, associated oil conserva-tor tank and cooler batteries shall be designedto meet the single risk concept so that simul-taneous deluge over all the three risk zones ispossible.8.8.7 The electrical clearances for high velocityspray system shall be as given in Table 1.83 Switch Gear8.9.1 Gas filled circuit breakers ( such as SF8 orsulphur-hexafluoride ) and vaccum breakers arethe least fire hazardous as compared to the oilbreakers or air-blast breakers. Hydrant protec-tion shall be in close proximity to these risks.8.9.2 For an enclosed switch gear room auto-matic Halon or CO, total flooding extinguishingsystem is considered preferable to water spray.Switch rooms shall be provided with controllableventilators.8.9.3 All cable entries in the switch gear roomshall be effectively sealed by use of fire stops( see IS 12459 : 1988 ).8.9.4 All switch gear rooms shall be kept clearand free from any accumulated debris or flam-mable material.8.9.4.1 The following 6.6 kV and 415 V switchboards may preferably be housed in separaterooms:

    a) Unit switch boards ( with separate roomfor boards of each unit ),b) Station switch boards, andc) Unit switch boards.

    8.9.5 Switch gear rooms shall be pressurised bythe ventilation system to prevent ingress of dust.

    off the pressurised ventilation system before thecentralised extinguishing gas system is to be putinto operation.Table 1 Ciearamze from Water Spray)Equipment to Live UnAdatedElectrical Components

    ( C&use 8.8.7 )Line voltageVoltage to Ground

    ICV kVTo 15 To 9

    23 13345 2046 2769 40

    115 66138 80161 93196-230 114-132

    287-380 166-220

    500 290

    500-700 290-400

    NOTES

    Design BIL MiOhllUlUCletmncekV mm110 178150 254200 330250 432350 635550 940650 1118750 1321PO0 1600

    1 050 19301 175 2 2101300 24891 425 2 7691550 30481 675 3 3271 880 36071 92s 3 8862100 4 267

    2300 4 6741 BIL values are expressed as kilovolts ( kV ), thenumber being the crest value of the full wave impulsetest that the electrical equipment is designed to with-stand.2 When the design BIL is not available. and whennominal voltage is used for the design criteria, thehighest minimum clearance listed for this groupshall be used.

    8.9.6 Smoke detectors of ionisation and opticaltypes shall be employed in the switch gear roomson cross-zoning principle with suitable timedelay devices incorporated. Proven intelligent,micro processor based det,ection/suppressionsystem shall be preferred.8.9.7 Fixed automatic gaseous extinguishing oflocal application type shall be ideal in the switchgear system.8.10 Control Room8.10.1 For control room of Class I and II ofpower generating units as well as distributionstations shall have fire barrier/separation walls

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    room. The control room shall bafe 2 hours fireresistance with smoke stock fire check doors ofthe same rating.810.2 All cable entries/openings in the controlrooqn shall be effectively sealed.8.10.3 The room shall be kept clear and free ofany waste material whenever g?ass panels areprovided, it shall be of clear fire resisting glasshaving minimum 45 minutes fire resistance orfitted with automatic resistant shutters/automaticwater curtain.8.10.4 The AC system shall be automaticallyswitched off before. the extinguishing system isput into operation.8.10.5 Smoke detectors of ionisation and opticaltypes shall be provided in the Control room oncross-zoning principle with suitable time delaydevices incorporated. Proven intelligent, micro-processor based detection/suppression systemshall be preferred.810.6 ON and OFF type sprinkler system,CO, or Halon extinguishing system shall beprovided for control room. In this case ON andOFF type should be preferred.8.11 Cable Galleriesqll.1 The experience of Power Station cablef2res had been that in many cases, several units,if not the whole station,-got seriously affected bya single fire. PVC is not easily flammable butburns freely in fairly high temperature conditionsproducing copious quantities of dangerous fumesand gases including HCL gas. These gases aretoxic and highly corrosive. The cable galleries,separating rooms etc shall be provided withfacilities for ventillation and means for controll-ing it from outside. Apart from the need toclear smoke and toxic gases in the event of afire, ventillation may be necessary for tempera-ture control of the galleries on areas.8.11.2 To limit the spread of fires along cableways fire barriers shall be installed in accordancewith the requirements of IS 12459 : 1988.811.3 Access and exit ways large enough toallow a man wearing breathing apparatus andcarrying other fire fighting equipment to passthrough Shall be provided. The distance betweensuch exit ways shall not exceed 30 m in thecable runs. The cable galleries or runs shall beprovided with automatic fixed fire fighting ins-tallations using water, CO, halon or highexpansion foam. Ho,wever, water spray sprinklersystem is generally preferred. The design ofsprinklers and projectors shall ensure that norack or cable is left unprotected. Automaticsprinkler system for the cable galleries shall bedesigned for a density of not less than 12 lpm/m*over area of 232 ms. Water spray system shallIrave the same density.

    IS 3034 : 19938.11.4 Smoke detectors of ionisation and opticaltype shall be provided in the control room oncross-zoning principle with suitable time delaydevices. Proven intelligent micro processorbased detection/suppression system shall beprovided. Alternatively heat detectors of lineartype covering all the cable racks/trenches shallbe installed.8.11.5 Where high expansion foam or gasexgtinguishing systems are used, the system shallactuate only after all persons inside have beenevacuated.8.11.6 Self-contained BA sets shall be availablefor ready use by trained personnel at strategicpoints near the entry to the cable galleries.8.11.7 All cable galleries/tunnels shall be main-tained in a neat and tidy conditions. These shallnot be used for storage/dumping of scrap or anyother article including electrical spares.8.11.8 The means of escape shall be clearlyindicated and all exit ways shaJl be kept clear.The controlled access procedure shall be enforc-ed for the cable galleries, tunnels etc foremployees on regular work or inspection duties.8.11.9 Floors of all cable galleries;tunnels shallhave a slope of suitable gradient leading to asump of adequate capacity for collectingseepageand other water including water used for firefighting. An automatic sump pump of suitablecapacity shall be installed at each sump to pumpout the water to the surface drain.8.12 Coal Storage and H8ndliDg Eqnipmeet8.12.1 Coal handling plant shall be providedwith an early warning fire detection system formoving and stationery fire detectos such as rateof rise/i&a-red/linear heat detectors/opticalbeam should be adopted.8.123 The fire protection measures for openstorage of coal and coal handling equipment, asprescribed in IS 3595 : 1984 shall be provided.In addition, the followjng measures shall also becomplied with.8.12.2.1 After determining the location andextent of a fire in a coal storage yard, the coalshould be dug out and the heated coal removed.Moisture accelerates oxidation, and therefore ithas got to be ensured that the seat of the 8re isattacked. For this, the use of Extended BranchPipe ( see IS 11101 : 1984 ) shall be helpful.8.12.2.2 Caution has to be exercised whileapplying extinguishing water jets on coal andcoal handling equipment to avoid raising of acoal dust cloud which may result in a dustexplosion.8.12.2.3 For enclosed structures adequateexplosion venting provision shall be made,

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    IS 3034 : 19938.12.2.4 Static electricity hazards shall be mini-mised by the permanent bonding and groundingof all equipment including conveyor belts,pulley idlers, motor drives, etc.8.12.2.5 Automatic sprinkler system shall bedesigned for a minimum of 10 lpm/m* densityover 232 m* area. Water spray system shall havethe same density.8.12.2.6 Conveyors that are below grade orenclosed present special hazards for fire fighting,and need to be maintained properly.8.12.2.7 The actuation of detection system shallautomatically shutdown the conveyor belts inthe area involved.8.12.2.8 On detection of a fire dust collectorsand fans shall automatically shut-down.8.12.2.9 Carbon monoxide ( CO ) gas detectionsystem shall be desirable for pulverizers to giveearly warning about conditions leading to firesand explosions.8.12.2.10 The planed hydrant system shouldcover the coal storage and handling areas/equipments also. The escape route in overheadconveyor system, adequate means of escape shallbe provided particularly in long enclosed con-veyor belts. In the later case, exit doors shall beprovided at intervals of not greater than50 metres, fitted with escape rungs, which wouldenable persons inside the closed conveyorsystem to escape in case of fire/explosion.8.13 Boiler Piant Fire Protection8.13.1 Boiler furnaces shall be protected withautomatic sprinkler water spray, foam or foamwater sprinkler systems covering the burnerfront oil haxard.8.133 Boiler furnaces and boiler front areasshall be provided with automatic fire detectionsystems based on rated type fire detection systemin accordance with IS 2175 : 1988.8J3.3 Boiler front fire protection systems shallbe &signed to cover the fuel oil burners andigniters, adjacent fuel oil piping and cabie up toa 6 m distance from the burner and igniterincluding structural numbers and walk-ways atthese levels. The sprinkler systems shall bedesigned for a density of 10 lpm/ms over 232 rnsarea. Water spray system shall have the samedensity.8.13.4 Entire boiler plant shall be protected bywet riser system with landing valves at all levelsand connected to the hydrant water mains.8.14 Electrostatic Precipitator8.14.1 Once a tie is detected the ESP unitshould go into emergency shut-down immedia-

    have been stopped and the electrostatic precipi-tator has been shut-down and de-energised, thprecipitator doors may be opened and watejet/spray directed as required.8.15 Gas Turbine Generators8.15.1 Certain areas of the turbine operate ahigh temperature and have slow cooling ratafter shut-down. Surface temperature of thcombustion chamber will be higher than thignition temperature of fuel and lube oil.8.152 The lubricating and hydraulic seal osystems require similar type of fire protection a* the case of steam turbine driven generators.#nolated installations may be protected with aautomatic sprinkler water spray system.8.15..3 Where the generator is installed in aenclosure, a COP system may be provided.8.15.4 In gas turbine generator and accessorycompartments, to extinguish fires in electricalequipment by CO, system, the rate of dischargeshall be such that a 34 percent concentration attained within one minute after actuation, an30 percent concentration shall be maintainedthroughout the deceleration period but not lesthan twenty minutes. All metal surfaces shall bcooled to below auto-ignition temperature othe oil. The minimum concentration amentioned above shall be achieved after takinginto account the possible leakage.8.15.5 The fuel system shall be inter-locked witautomatic fire extinguishing system so that thfuel supply is automatically shut off upooperation of the fire extinguishing system.8.15.6 The emergency shut down controls shaprovide tripping arrangement for over-speedexcessive vibration, flame-out and high exhaustemperatura.8.16 Water Supplies for Fire Fighting8.16.1 The water supplies for fire fighting foPower Stations shall by and large, conform the provisions contained in IS 9668 : 1990 aninternal Hydrant System to IS 3844 : 1989 anExternal Hydrant System to IS 13039 : 1991. Iaddition, the following requirements shall alsbe taken into account.8.16.1.1 The water supplies shall be planned othe basis of the requirement of the largest fixefire extinguishing system demand plus thmaximum demand from the hydrant mains not less than 3 600 l/m for minimum 4 hours duration for power stations falling undethe category of classes 1 and 2, and for a minmum of 3-hours duration for the lower categories. Pumping capacity of the water supplsystem for fire fighting shall be based on threquirements mentioned above. It shall b

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    IS 3034:1993fighting mains to meet the requirements ofprocess units or other services. The water mainsshall be of adequate size as prescribed in relevantIndian Standards and shall be of wrought ormild steel ( located and wrapped ) pipe [ galvani-sed and ungalvanised/UPVC/GRP/Centrifugalcast ( spun ) iron/stainless steel 1. If the mainsare laid in high corrosive situations, it may bedesirable to cathodic protection or coating andwrapping or both, if required.8.16.1.2 The fire fighting pumps shall be- ofautomatic starting with manual stopping and inconformity with IS 12469 : 1988.8.16.1.3 The main reservoir shall have replenish-ment arrangement for complete re-fillingoperation which shall preferably be accomplishedautomatically.8.16.1.4 The water mains shall be looped aroundthe main power block and the pipe sizes shall bedesigned to cater to future expansion, needs.8.16.1.5 The interior fire protection mains/risersshall be considered as an extension of the yardmain and shall be provided with at least 2 valveconnections with sectional control valves.8.16.1.6 For the entire power station area onlyBranch Pipe Universal conforming toIS 2871 : 1983 shall be provided in the hosecabinets as spray nozzles having sheet-off capa-bility shall be ideal for use on electricalequipment.8.17 Manual Fire Alarm System817.1 The entire plant area, including adminis-trative and other buildings shall be providedwith manual fire aiarm system with call boxesdeployed at various strategic locations. Thesystem shall conform to the requirements givenin IS 2189 : 1988. The control panels of the firealarm system shall be located both in the plantcontrol room as well as the fire station controlroom.8.18 Lightening Protection818.1 Lightening protection for the powerstation building and outdoor bulk oil storageareas shall be provided.8.19 Emergency Power819.1 All generator units require emergencypower for operation of the turning gear, bearingoil pumps, seal oil pumps control. units, besidesmeeting the requirements of emergency serviceslike emergency lighting of all vital areas, meansof escape, fire fighting pumps etc. A set ofstation batteries is a reliable supply for eachload. Separate battery banker shall be providedfor each unit and control centre. In addition,emergency stand by power is necessary in theform of diesel generator. These units will providebackup power to the station battery system and

    shall be designed to have capability of sufficientpower for automatic and dead start. Inaddition, emergency lamps with adequate illu-mination shall be provided at strategic locationswhich shall automatically operate on the failureof the mains supply.9 FIRE PROTECTION FOR POWER PLANTSDURING CONSTRUCTION9.1 The potential fire hazards during construc-tion of Power Stations are considerable, andcall for observance of stringent fire precautions.An above average level of fire protection isnecessary during this phase due to life safetyconsideration of the large number of on-sitepersonnel, high value of materials, and longduration of the construction period.9.2 The availability of essential fire protectionequipment, and minimisation of fire risksduring construction activities are particularlyimportant.9.3 Construction schedule shall be co-ordinateso that planned permanent fire protectionsystems are installed and placed into services assoon as possible, at least prior to theintroduction of any major fire hazards.9.4 Minimum fire detection and fire extinguish-ing measures shall have to be provided for alllocations where fire hazards are present, likestorage of construction materials, storage offlammable materials, fire safety of welding andcutting and other building operations.9.5 A fire trained supervisor shall be available atthe construction site to ensure that all essentialfire safety precautions are.observed.9.6 Where practical, the permanent fire hydrantsystem for the plant shall be installed wellahead of the completion of the project so thatfire fighting water supplies shall be available evenduring construction period. Where this is notpracticable, a minimum number of water tanksof not less than .1*25 lakh litres capacity withreplenishing arrangements shall be available atstrategic locations in the plant area which maybe utilised as emergency water supply for firefighting even after commissioning of the plant.A minimum of 2 hours duration water supply forfire fighting shall be available at the constructionsite.9.7 Portable Fire Extinguishing System9.7.1 In addition to the fixed water extinguishingsystems, sufficient number of first aid firefighting equipment like different types fire extin-guishers shall be available for development atvarious fire risk areas as per IS 2190 : 1992. Itis essential that the fire extinnuishers areinspected, maintained in accoydance withIS 2190 : 1992.

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    3s 3034 : 19939.8 Maintenance of Fire Protection System/EQnipment Table 2 Fire Eqaipmeot Inspection, Testingand Maintenance Freqaency Schedule9.8.1 All the fire protection system/equipmentor devices shall be inspected -and maintained _regularly to ensure for their safe operation at alltimes. The suggested schedule for each insnec- Item Wee -_y mootbly Semianoual -a~tion, testing anTmaintenance is given in Table 2. SupervisoryProper records of such maintenance shall be Alarm Circuits Xmaintained . Fire and SmokeDetectors10REQUIREMENT OF MAJOR ?IREFIGI&IITT~~~P&ANCES/EQUIPMENT10.1 On account of the reason that the powerstations are generally located in relatively remoteareas with hardly any other assisting fire servicewithin reasonable distance, it is necessary forthe power stations to be provided with an inde-pendent full-fledged and well maintained fireservice of their own. Quick response to a fireoutbreak by fire fighting service is vital as itmakes a difference between a small tie or amajor fire with catastrophic loss. In other words,power station fire brigades shall be in a positionto ,tackle a tie, control and extinguish it beforeany damage is done.

    Manual Fire AlarmsSprinklerWater Flow AlarmsSprinkler and WaterSpray Systems XFoam Systems XHalogenated Agents,$$+~tn-4 and COs XFire Pumps and

    Booster Pumps TWater Tanks andAlarms XPIVs and OSand Y Valves XFire Hydrants andAssociated ValvesFire Hose and10.2 Reqoirement of Major Fire Fighting StandpipesAppliances/F@ipments Portable Fire Bx-tinguishers and

    10.2.1 Major Appli ance/Equipment for PowerStations of Install ed Capacity Less than 50 MWCluss IV Power Stations )10.2.1.1 There may not be any need for anymajor fire fighting appliances for generatingstations of this category provided the stationis located within 8 km from the nearest munici-pal fire brigade possessing adequate 6re fightingappliances. In case it is located at a further dis-tance, or if .the municipal fire appliances are not

    available, a Trailer Fire Pump conforming toJS 944: 1979, or a higher capacity PortablePump conforming to IS 12717 : 1989 shall beprovided with skeleton fire staff.

    Hose NozzlesFire Bridage Equip-mentFire Doors XSmoke VentsEmergency LightingRadio Communica-tion Equipmentwhere

    TA MITT M/T

    MITA MA M

    A MMA MITXX MjTX

    XXTX

    x/TT

    TT

    TT

    M/T

    MT

    MIT

    10.2.1.2 The Power Station shall have a hydrantsystem, and also at least 3 Static water tanksdeployed at strategic locations, of minimuml-25 lakh litres capacity. The following shall beprovided:a) The v/m equipment, minimum of25 lengths of 63 mm dia fire fightinghose of 20 m lengths each ,( 15 lengths

    X - InspectionT = Operational TestM = MaintenanceA - Alarm Test ( Transmitters )NOTES

    of type A of IS 636 : 1988, and10 lengths U/L hose conforming toIS 4927 : 1992 );b) Branch Pipe Universal, con- -440.

    forming to IS 2871 : 1983C) Foam-making Branches FB -220.

    1 Testing of these systems should be done wherepossible after necessary precautions have been takento elimioate any hazardous conditions which wouldresult from the discharge of the extinguishing agent.2 00 systems where 00~ testing is not practical,representative number of no&es should be removedand checked for signs of blockage. In these cases theannual test will consist of a trip test of deluge pre-action valves or valve operations as applicable.3 This is a test to verify pump operability only.4 Performance tests to be conducted render load toverify that the pumps meet design conditions.5 Valves not locked to be inspected weekly. Valveslocked or electrically supervised to be inspectedmonthly.6 Testing of standpipes to include water flow at

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    4e)f >s)h)j)W

    Foam-making FB 10 xMechanical Foam compound1 IS 4989 ( Part 1 ) : 1985 ]BA sets ( Positive Pressuretype )Blower and Exhauster for fire-fighting as per IS 941 : 1985Water Jel Blankets ( FireB ankets ) ( 1.80 x I.50 m )Water Jel Blankets ( forburns ) ( O-90 x 0.75 m )Water Jel Container

    - 1 No.- 200 L-440.-220.-220.-440.- 1 No.

    10.2.2 The above scales of equipment and fireprotection systems shali be equally applicable toload despatch centres in the grid systems, andalso for major distribution stations ( 220 kVsubstations and abo ).

    3.4.

    10.2.3 For Generat i ng St ati ons of I nst all edCapacity rom 50 MW to 199 MW ( CIass II )5.

    The follcwing equipments shall be provided: 6.

    1.

    2.

    3.

    4.

    5.6.

    7.

    8.9.

    10.

    TVpeofAppliancesFoam and CO2 C T( Conforming toIS 951 : 1987 )Water Tender TypeB conforming toI 950 : 1980Large capacity por-table pump conform-ing to IS 12717 :1989Portable Water/Fcam MonitorsB A sets ( PositivePressure type )High Pressure Charg-in sets ( for B ASets )Blower and Exhaus-ter for fire fighting,conforming toIS941 : 1985Water Jel Blankets( 1.80 x 1.50 m )Water Jel Blankets( O-90 x O-75 m )Water Jel Container

    No M anningPattern1 Round theclock1 Reserve

    1 Reserve

    2 (No separatemanpowerrequired )8 sets1No. (atHQ)

    2 No.

    4 No.8 No.2 No.

    IS 3034 : 310.2.4 For M ajor Power Stat ions H avi ng InstaCapacit y Ov er 200 MW up to 9Y9 MW ( Class The following equipments shall be provided:

    1.2.

    7.8.9.

    10.11.12.13.14.15.16.

    17.

    Type fAppliancesFoam and CO, C/T

    Dry Chemical Ten-der 2 000 kg confor-ming to IS 10993 :1984$tter Tender typeHigh Capacity Por-table Pump ( con-forming to IS 12717:1989 )Portable Water/Foam Monitors13.5 m Light ,ailll;extensionwith propsB A sets ( PositivePressure type )High Pressure Char-ging SetTrailer/PortableFlocd Light UnitJeep 4 x 4Blower and Exhaus-terWater Jel Blankets( 1.80 x 1.50 m )Water Jel Blankets( 0.90 x 0.75 m )Water Jel ContainerFoam CompoundDry Chemical Pow-der Trailer of 150 kgcapacityHigh ExpansionFoam Generator

    1 0.

    11

    2

    1

    181114

    8 No.16 No.

    4 No.20 000litres1 No.

    1 No.

    ManningPatternRound thclock

    Round theclock

    Reserve

    No separmanpowerrequiredNo separmanpowerrequired

    10.2.5 Super Thermal/Power Stations HavI nstal l ed Capacit y Exceedi ng 1 000 MW ( ClassThe following equipments shall be provided:

    Type of No. Manning

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    Is 3034 : 1993

    3.4.

    5.

    6.7.8.9.

    10.11.12.13.14.15.16.17.18.

    TypeoAppliances~~~;rnical TenderEmergency Tenderconforming toIS 949 : 1985Hydraulic Platform22 m Height (indige-nously fabricated )Portable Water/Foam Monitors13.5 m light alloy ex-tension laddersTrailer/PortableFlood Light UnitJeep 4 x 4B A sets ( PositivePressure type )High Pressure Charg-ing SetBlower and Exhaus-terWater Jel Blankets( 1.80 x 1.50 m )Water Jel Blankets( 0.90 x 0.75 m )Water Jel ContainersFoam CompoundDry Chemical Pow-der Trailer of 150 kgcapacityHigh Expansion FoamGenerator

    No. ManningPatternRound theclockAs reserve

    1 As reserve

    421124

    1 set4 No.

    16 No.

    Reserve

    32 No.8 No.50 ooolitres1 No.2 No.

    NOTE-Considering the large area of the SuperThermal Power Stations and also for facilitatingquick turnouts it may be necessary to deploy th;operational equipment at two fire stations, a mainFire Station and Sub-Fire Station, both having up-date communication arrangement to help easy mobi-lisation in case of emergency.10.3 Reqnirement of Manpower for Manning theFire-fighting Appliances10.3.1 The manpower requirements has to bcbased on the number of fire fighting appliances tobe kept manned round the clock(day and night).The scales of manpower required for each typeof appliance shall be as per the norms prescribedby the Standing Fire Advisory Council of theGovernment of India and also as per guidelinesgiven in IS 6070 : 1983. The fire crew, computedas per the scales prescribed above shall work inthree shifts. A reserve of 334 percent of the totalstrepgth required for shift duties shall also beprovided, to cater for leave, absence, training

    requirements, etc. it has to be ensured that thedesignated strength of crew for each shift isavailable for speedy turn at all times for quickresponse to fire calls.10.3.2 For generating stations of installed capa-city less than 50 MW the following minimummanpower shall be maintained:

    Assistant Station Officer - 1Leading Fireman ( L/F )/Fireman ( F/M ) -- 1 ( per shift )The norms shall apply for manpower require-ments for major substations also.IiO.3.2d In addition to the full time fire fightingstaff, selected members of the security/plantstaff shall have also to be imparted basic trainingin fire fighting/fire prevention duties who mayalso be utilised for fire fighting duties in emer-gency.10.3.3 For Class III, Class II, and Class I cate-gory Power Stations the manpower requirementsshall be computed as per scales laid down by theStanding Fire Advisory Council/IS 6070 : 1983.10.3.4 In addition to the above, one qualifiedfire officer of senior rank shall also be necessaryfor each power station, depending upon thecategory, as overall incharge of the PowerStation Fire Brigade for ensuring proper train-ing, control and superviSion of the entire firefighting staff. He shall also be responsible for allthe 6re protection arrangements in the PowerStation.10.3.5 Considering the large area of Super-thermal Power Stations, facilitate quick turn outit may be necessary to deploy the operationalmanpower at two Fire Stations - a Main FireStation and a Sub Fire Station, both having up-to-date communication facilities to help easymobilisation in case of emergency.10.4 Fire Stations10.4.1 Power Stations authorised for full timeFire Brigades with major fire fighting appliancesshall have well designed Fire Stations for housingappliances and fire fighting staff. They shall beso located that the response time for fire appli-ances are kept to a minimum not to exceed5 minutes. The design of the Fire Stations shallconform to the Standard Fire Station require-ments as prescribed by the Standing Fire Advi-sory Council.11 FIRST-AID FIRE FIGHTINGIn the entire Power Station area, first-aid firefighting equipment like fire extinguishers shall bedeployed. It is essential that these extinguishersare periodically inspected and maintained inaccordance with the provisions contained inIS 2190 : 1991.

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    I S 3034 : 199312 FIRE EMERGENCY ORDERS12.1 Each Power Station shall have a Fire Emer-gency Plan formulated so as to facilitate organi-sed actions to be taken in case of fire by staff atvarious levels, during day-light hours as well asnight. These orders shall also contain the ins-tructions on fire prevention measures and thefire fighting organisation.

    IS No.636 : 1988

    941 : 1985

    944 : 1979

    949 : 1985

    950 : 1980

    951 I 1987

    1641 : 1988

    1642 : 1989

    1643 : 1988

    1644 : 1988

    12.1.1 The Fire Emergency Orders shall alsocontain a Mutual Aid Scheme for mobilisingassistance by way of equipment and trainedmanpower from neighbouring units, if available.12.2 Periodical mock fire drill shall be conduct-ed so as to check the alertness and efficiency ofPlant staff as well as fire fighting staff, andrecords maintained.

    ANNEX A6Clause 2 )

    LIST OF REFERRED INDIAN STANDARDSTi t le

    Non-percolating flexible firefighting delivery hose ( thirdrevision )Specification for blower andexhauster for fire fighting( second r evi sion )Functional requirements for1 800 l/min trailer pump forfire brigade use ( secondr evi sion )Functional requirements foremergency ( rescue tender )for fire brigade use ( secondr evi sion )Functional requirements forwater tender type B for firebrigade use ( second r evi sion )Functional requirements forcrash tender for air fields( th i r d tuis ion )Code of practice for firesafety of buildings ( general ):General principles of firegrading and classification(first r evi sion )Code of practice for firesafety of buildings (general ):Details of construction (firstrevision )Code of practice for firesafety of buil;ta;dirJ general ):Exposure (firstrevision )Code of practice for firesafety of buildings ( general ):

    I S No.1646 : 1982

    2175 : 1988

    2189 : 1988

    2 90 : 1992

    2309 : 1989

    2871 : 1983

    3181 : 1978

    3594 : 1991

    3595 : 1984

    Ti t leCode of practice for firesafety of buildings ( general ):Electrical installations f i rs tr evision ) .-Specification for heat sensi-tive fire detectors for use inautomatic fire alarm system( second r evi sion )Codeof practice forselection,installation and maintenanceof automatic fire detectionand alarm system ( secondrevision )Code of practice for selection,installation and maintenanceof portable first-aid fire extin-guishers .( thi rd r evision )Code of practice for the pro-tection of buildings and alliedstructures against lighting( second revision )Specification for branch pipe,universal for fire fighting pur-poses fir st r evision )Fire resistant conveyor belt-ing for underground use incoal mines fi rst revision )Code of practice for firesafety of industrial buildings:General storage and ware-housing including cold storage(first r evi sion )Code of practice for firesafety of industrial buildings:Coal pulverizers and associa-

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    , s 3034 : 1993IS No.

    3844 : 1989

    4927 : 1992

    4989( Part 1 ) : 1985

    4989( Part 2 ) : 1984

    4989( Part 3 ) : 1987

    6070 : 1983

    8633 : 1977

    9668 : 1990

    Tit leCode or practice for installa-tion and maintenance of inter-nal hydrants and hose-reel onpremises ( jirst revi sion )Specification for unlined flaxcanvas hose for fire fighting( j rst revision )

    ISNo.10993 : 1984

    Tit leFunctional requirements fo2 000 kg dry powder tenderfor fire brigade use

    111006 1984 Ffash back arrestor ( flamearrestor )

    Specification for foam con-centrate ( compound ) forproducing mechanical foamfor fire fighting: Part 1 Pro-tein foam ( second revi sion )Specification for foam con-centrate ( compound ) forproducing mechanical foamfor fire fighting: Part 2 Aque-ous film forming foam( AFFF )

    11101 : 1984 Specification for extendedbranch pipe for fire brigadeuse11360 : 1985 Specification for smoke dete-ctors for use in automaticelectrical fire alarm system12459 : 1988 Code of practice for fireprotection of cable runs

    Specification for foam con-centrate ( compound ) forproducing mechanical foamfor fire fighting:Part 3 Fluoroprotein foam

    12469 : 1988 Pumps for fire fighting appli-cations

    Code of practice for selection,operation and maintenanceof trailer fire pumps, portablepumps, water tenders andmotor fire engines ( Jirstrevi sion )

    12717 : 1989 Functional requirements ofire fighting equipment -High capacity portable pump-set ( 1 000-l 600 l/min )12777 : 1989 Fire safety - Flame spreadof products - Method forclassification

    Technical requirements forlocation of boilers installa-tions and boiler houses

    13039 : 1991 Code of practice for provi-sion and maintenance oexternal hydrant system

    Code of practice for provi- 12835 Code of practice for designsion and maintenance of ( Part 1 ) : 1989 and installation of fixed firewater supplies and fire fight- extinguishing system: Part 1ing Low expansion foam

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    IS 3034 : 1993

    ChairmanSHBI J . N. VAKIL

    MembersSHRIK. RAvr ( Alterncrtcto Shri J . N. Vakil )DR R.K. BHANDARI

    SHRI R.P.BHATLASrru~ M. M. K APOOR Altcrnuf~ )SHRI 5. N. CHAKRABORTYSum P. K. MAJ TXDAR ( Alternate )SHRI P. K. CBATTERJ EE

    SHRI V. K. SHARMA Alternate)CHIEIEF IRE OFFICESSoar D. PAD~ANABXCASE~CI G. P. MONNAIAH ( Altanab )

    ANNEX BForeword

    COMMITTEE COMPOSITIONFire Safety Sectional Committee, CED 36

    DEPUTY CHIEF ENGINEER( P 8s D )EXECUTIVEENQINEER ( P 8s D )( Alternate )SHRI S. K. DHERISHRI R. C. SHARMA ( Altwnnts 1SHRI S. R. D~~AI~~AAIYSHRI S. N. LAKSHMANNA ( Alternate )FIRE ADVISERSHRI P. N. GaosrrSHBI C. P. G~~AINSHRI S. C. GUPTA

    SHRI SANJEEV ANGILA Allsrnsfr)SHRI M. R. KAMAT~SERI K. R. EASWARAN ( Alfarnotr )SHBI V. M. MADQESHRI A. B. PHADKE ( Altcmatr )BBIJ MA~HOTI~ASHRI G. B. MENONSERI S. R. NARASIXEANSanr RAJ ENDRA Srsort ( Alfrrnotr )PBESIDENTSH~LIV. M. RANALKARSHRI HARISH R. SALOTSHRI RAJ ESH K. SALOT ( AlftsrnairSHRI N. L . N. SHABXASHRI M. L. KHIJ RANA ( Allrraut~ )DE T. P. SHARMADn GOPAL KRISEAN ( AlternaU )SEBI R. SUNDA~ARAJ ANSrm~ S. K. CHATTOPADHAYAY ( Alftmtatrsmtr UNlL Das

    SRRI R. N. CHACHBA ( Alfwnafe )SHSI M. S. TYAQISHRI P. K. SAKSENA ( Alkrnatr )SHBI D. VENWOPALSHRI T. V. MADHU~~ANI Altmiatr )SERI Y. R. TANEJ A,Director-in-Charge ( Civ Eugg )

    RsprescntingTariff Advisory Committee, Bombay

    Institution of Engineers ( India ), CalcuttaEnginkers India Ltd, New DelhiTariff Advisory Commttee, MadrasMinistry of Defcnce ( DR DO ), New DelhiMunicipal Corporation of Bombay, BombayTata Consulting Engineers, BombayNorthern Railway, Ministry of Railways, New Delhi

    Municipal Corporation of Delhi, DelhiMinistry of Defence ( Engineer-in-Chiefs Branch ), New DelhiMinistry of Home Affairs, New DelhiIn personal Capacity, New DelhiCentral Public Works Department, New DelhiLloyds Institution ( India ) Pvt Ltd, New DelhiMather and Platt Ltd, BombayThe Hindustan Construction Co Ltd, BombayState Bank of India, BombayIn Personal Capacity, DelhiCentral Electricity Authority, New DelhiInstitution of Fire Engineers India, New DelhiMinistry of Petroleum and Natural Gas, New DelhiVijay Fire Protection System Pvt Ltd. RomhayBharat Heavy Electricals Ltd, HyderabadCentral Buildinga Research Institute ( CSIR ), RoorkeeNational Thermal Power Corporation Ltd, New DelhiMetallurgical Engineering Consultants ( India ) Ltd. RanchiMinistry of Labour, KanpurLoss Prevention Association of India Ltd. BombayDirector General, BlS ( Ex-o@iio Mmnbsr )

    Member SecretarySERI H~ANT KUYARJ oint Director ( Civil Engineering ), BIS

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    Bureau of Indian StandardsBIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to connected matters in the country.CopyrightBIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publication), BIS.Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes arc needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issueof BIS Handbook and Standards Monthly Additions.This Indian Standard has been developed from Dot: No. CED 36 ( 4775 )

    Amend No.Amendments Issued Since Publication ~

    Date of Issue Text Affected

    Headquarters:BUREAU OF INDIAN STANDARDS

    Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones: 323 01 31,323 33 75,323 94 02Regional Offices:

    Telegrams: Manaksanstha(Common to all offices)

    TelephoneCentral : Manak Bhavan, 9 Bahadur Shah Zafar MargNEW DELHI 110002Eastern :

    Northern :

    l/14 C.I.T. Scheme VII M, V.I.P. Road, ManiktolaCALCUTTA 700054SC0 335336, Sector 34-A, CHANDIGARH 160022

    Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113

    -Western :

    Branches :

    Manakalaya, E9 MIDC, Marol, Andheri (East)MUMBAI 400093AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR.COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI.HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.PATNA. PUNE. THIRUVANANTHAPURAM.

    323 76 17,323 38 41

    337 84 99,337 85 61337 86 26,337 9120

    60 38 4360 20 25135 02 16,235 04 422351519,2352315

    832 92 95,832 78 58832 78 91,832 78 92

    Printed by Reprography Unit, BIS, New Delhi

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    AMENDMENT NO 1 FEBRUARY 2005TOIS 3034:1993 FIRE SAFETY OF INDUSTRIALBUILDINGS : ELECTRICAL GENERATING AND

    DISTRIBUTING STATIONS CODE OF PRACTICE Secon Revision )

    Page 8, clause 8.9.2, line 8 ) Substitute Clean Agents for Halon. Page 9, clause 8.10.6 Substitute Clean Agents for Halon. Page 9, clause 8.11.3 Substitute Clean Agents or Water Mist forhaIon.

    CED 36Reprography Unit BLS New Delht Ind