CP 52 Presentation

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Brief Sprinkler Design and installation presentation according to CP52

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Classification of occupanciesa) Light hazard Dccupanciesb) Ordinary occupancies:Ordinary hazard group 1Ordinary hazard group 2Ordinary hazard group 3Ordinary hazard group 3 specialc) High hazard occupanciesHigh hazard-process risksHigh hazard-high-piled storage risksCategory 1Category 2Category 3Category 4Light hazard class systemsLight hazard DccupanciesNon-industrial occupancies where the amount of combustible content is lowExamplesLodging housesResidential housesPlaces of worshipsSchools, colleges, universitiesSewerage worksThe piping and pressure flow requirements for light hazard systems are not designed to provide adequate densities should more than six sprinklers come into operation. Therefore, where there is any undivided area in excess of 126 m2 within a building otherwise classified as light hazard, the building shall be classified throughout as ordinary hazard group 1. NOTE - Undivided areas are those enclosed between full height walls and partitions, adequate to delay the flow of hot gases until a sprinkler head is operatedLight hazard class systemsDesign dataLight hazard systems shall be fully hydraulically designed to provide a flow of at least 48 L/min from each sprinkler within each hydraulically most unfavorable group of six sprinklers in all parts of the building regardless of the area covered by individual sprinklers.Each group of sprinklers shall be selected to form, as near as possible., a square with the longest side positioned such that it imposes the greatest hydraulic demand. Except as varied by this section, hydraulic calculation methods shall conform to the requirements of clause 13.(Full Hydraulic Calculation of Sprinkler Systems)Water supplyThe water supply shall be capable of providing the maximum pressure and flow requirements of the system as determined by the full hydraulic calculation methods described in above and clause 13 for a minimum duration of 30 minMinimum capacity of water supplies shall be a minimum of calculated flow rate (48 L/min/sprinkler) for the most unfavorable six sprinklers for a duration of 30 minutes plus 20%The calculated minimum water storage capacity may be reduced by up to a third, provided an automatic inflow to sprinkler tank is available at all times with sufficient flow to make up the difference within 30 minutes.Light hazard class systemsPumpsPumps shall comply with the appropriate requirements of 5.10 (pump installations) and 5.11(pump specifications) also 5.6.

Light hazard class systemsThe performance characteristics of pumps drawing from pump suction tanks shall be as set out in Table 14

Light hazard class systemsThe minimum nominal diameter of a suction pipe for pumps shall be 100 mm.The capacity of the fuel tank, which shall be kept full for a compression-ignition engine driven pump shall be sufficient to allow the engine to run on full load for 4 hours (see 5.11.3.3(f)(2)) In addition there shall be kept on hand sufficient fuel to run the engine for a further 6 hours.

Light hazard class systemsPumpsets shall comply with the foIlowing requirements:The duty flow and pressure of the pump(s) shall be not less than the flow and pressure calculated in accordance with 10.1 (Design data)The maximum flow rate of the pump(s) shall be taken to be 130% of the duty flow rate

Light hazard class systemsSpacing of sprinklersThe maximum area coverage per sprinkler shall be as follows:Sidewall sprinklers = 17 m2Other sprinklers=21m2In certain areas of light hazard occupancies such as attics, basements, boiler rooms, kitchens, laundries, storage areas, workrooms, electronic data processing rooms, air conditioning and building services plant rooms, restaurants and cafes not exceeding 126 m2 in areaThe maximum area coverage shall be limited to 12 m2 per sprinkler The maximum distance between sprinklers shall be limited to 4.2 m The maximum distance from walls and partitions shall be 2.1 m.The maximum distance between sprinklers on range pipes and between adjacent rows shall be as follows:Sidewall sprinklers along the walls= 4.6 m(see also 6.5) spacing and location of sidewall sprinklersOther sprinklers= 4.6 mLight hazard class systemsThe maximum distances of sprinklers from walls and partitions shall be as follows:Sidewall sprinklers from end walls = 2.3 mOther sprinklers = 2.3mSprinklers shall have a nominal orifice size of 10 mm and maybe spray pattern, ceiling (flush) pattern or sidewall patternOrdinary hazard group 1 (OH 1) occupanciesNOTE OH 1 Excludes woodworking, painting and any other high fire load areas which are to be treated as ordinary hazard Group 3 occupancies. In areas where there is storage of stock within the categories described in 3.2.1.1 in excess of the storage heights set out in the note to Table 21 (A) and 21 (B), high hazard protection will be required. Premises having mixed occupancies must be referred to the relevant authority for a decisionGroup 1 ordinary hazard occupancies include the followingCommercial Office buildingRestaurants and cafes

Ordinary hazard class systemsOrdinary hazard group 2 (OH 2) occupanciesNOTEOH 2 Excludes woodworking, painting and any other high fire load areas which are to be treated as ordinary hazard group 3 occupancies. In areas where there is storage of stock within the categories described in 3.2.1.1 in excess of the storage heights set out in the note to Table 21 (A) and 21 (B), high hazard protection will be required. Premises having mixed occupancies must be referred to the relevant authority for a decision.Group 2 ordinary hazard occupancies include the followingpublic and private car parks Motor vehicle manufacturers and assembly plants (excluding plastic component handing)Food manufacturing

Ordinary hazard class systemsOrdinary hazard group 3 occupanciesNOTEIn areas where there is storage of stock within the categories described in 3.2.1.1 in excess of the storage heights set out in the note to Table 21 (A) and 21 (B), high hazard protection will be required. Ordinary hazard group 3 occupancies include the followingAircraft factories (excluding hangars)Industrial FactoriesPharmaceutical and chemical manufacturers (not producing or using flammable solids, liquids, dust and the like)Data processingDepartmental stores, Shopping CentersOrdinary hazard class systemsOrdinary hazard group 3 specialNOTEThis group is an extension of group 3 occupancies where flash fires are likely, covering somewhat largerareas of operation, such as might be anticipated in connection with preparatory processes in textile mills and certain other risks.Group 3 special ordinary occupancies include the followingPharmaceutical and chemical manufacturers (producing or using flammable solids, liquids, dust and the like)Printing and allied trades (using flammable inks and solvents)Exhibitions

Ordinary hazard class systemsOrdinary hazard systems shall be hydraulically designed to provide an appropriate density of discharge over an assumed area of operation (number of sprinklers likely to operate) in all areas including the hydraulically most unfavorable areas of the protected building.The design density of discharge and the assumed area of operation shall be as follows Design density of discharge 5 mm/minAssumed area of operation:Group 172 m2Group 2144 m2Group 3216 m2Group 3 Special (see Note)360 m2NOTE - This group is an extension of Group 3 occupancies where flash fires are likely, covering somewhat larger areas of operation, such as might be anticipated in connection with preparatory processes in textile mills and certain other risks (for classification of occupancies, see 3.2.3)

Ordinary hazard class systemsOrdinary hazard class systemsWater supplies for ordinary hazard class systems shall comply with Table 15.

Ordinary hazard class systemsThe minimum capacity required for fully hydraulically calculated systems shall be not less than that which will supply the calculated flow requirements of the hydraulically most favorable area of operation for 60 min. For partially pre-calculated systems designed in accordance with 11.4.2.2 and 11.4.2.3, The minimum capacities shall be as specified in Table 16. These capacities relate to stored water sources entirely reserved for the sprinkler system (including fire hose reels). For pump suction tanks these capacities may be reduced In accordance with 11.2.2.2, but the maximum period of inflow shall be 1 hour.Ordinary hazard class systems

Ordinary hazard class systems

Ordinary hazard class systemsPump suction tanks shall have an effective capacity reserved entirely for the sprinkler system not less than that specified in Table 17 except that, where there is an automatic inflow which can be relied upon at all times, a smaller capacity will be allowed, provided that the pump can operate at full capacity for not less than 1 hour, subject to the following minimum capacities (see also 5.8.1):Group 125 m3Group 250 m3 Group 375 m3Group 3 Special100 m3NOTESharing of the storage tanks for sprinkler system and domestic purposes is not allowed. The pipes for the sprinkler system shall not be connected to any pipes or storage tanks conveying potable water.Ordinary hazard class systemsPumpsPumps shall comply with the appropriate requirements of 5.10 (pump installations) and 5.11(pump specifications) also 5.6.

Ordinary hazard class systemsThe performance characteristics of pumps drawing from pump suction tanks shall be as set out in Table 17

Ordinary hazard class systems

Ordinary hazard class systems

Ordinary hazard class systemsThe minimum nominal diameter of. pump suction pipe shall be as follows:Groups 1 and 2150mmGroups 3 and 3 Special200mmThe capacity of the fuel tank, which shall be kept full, for a compression-ignition engine driven pump shall be sufficient to allow the engine to run on full load for 4 hours. (see 5.11.3.3(f)(2)). In addition there shall be kept on hand sufficient fuel to run the engine for a further 6 hoursOrdinary hazard class systems

Ordinary hazard class systems