AS 2118 6 1995 automatic fire sprinkler systems combined s

AS 2118.6—1995Automatic fire sprinkler systems Part 6: Combined sprinkler and hydrant PUBLISHED BY STANDARDS AUSTRALIASTANDARDS ASSOCIATION OF AUSTRALIA 1 THE CRESCENT, HOMEBUSH, NSW 214

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AS 2118.6-1995 Automatic fire sprinkler systems - Combined sprinkler and hydrant

Licensed to LUU MINH LUAN on 25 Feb 2002

AS 2118.6—1995

Automatic fire sprinkler systems

Part 6: Combined sprinkler and hydrant

Installations It was approved on behalf of the Council of Standards Australia on

14 March 1995 and published on 5 July 1995

The following interests are represented on Committee FP/4:

Asset Services, Department of Administrative ServicesAustralian Building Codes Board

Australian Chamber of Commerce and IndustryAustralian Chamber of Manufactures

Australian Fire Authorities CouncilAustralian Fire Protection AssociationAustralian Water and Sewerage AuthoritiesCommonwealth Fire Board

CSIRO — Division of Building, Construction and EngineeringDepartment of Defence

Fire Protection Industry Association of AustraliaInstitution of Engineers, Australia

Insurance Council of AustraliaMaster Plumbers and Mechanical Services Association of VictoriaMelbourne Water

New Zealand Fire Equipment AssociationTelecom Australia

The Association of Consulting Engineers, Australia

Review of Australian Standards To keep abreast of progress in industry, Australian Standards are subject

to periodic review and are kept up to date by the issue of amendments or new editions as necessary It is important therefore that Standards users ensure that they are in possession of the latest ed ition, and any amendments thereto.

Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian Standard’, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards.

Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed Notification of any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 93292.

AS 2118.6—1995

Automatic fire sprinkler systems

Part 6: Combined sprinkler and hydrant

PUBLISHED BY STANDARDS AUSTRALIA(STANDARDS ASSOCIATION OF AUSTRALIA)

1 THE CRESCENT, HOMEBUSH, NSW 2140

ISBN 0 7262 9753 4

Part 1.1: Components — Sprinklers and sprayersPart 1.2: Components — Alarm valves (wet)Part 1.3: Components — Water monitorsPart 1.4: Components — Valve monitorsPart 1.5: Components — Deluge and pre-action valvesPart 1.6: Components — Stop valves and non-return valvesPart 1.7: Components — Alarm valves (dry)

Part 1.8: Components — Pressure reducing valvesPart 1.9: Accelerators and exhausters

Part 2.1: Piping — GeneralThe terms ‘normative’ and ‘informative’ have been used in this Standard to define theapplication of the appendix to which they apply A ‘normative’ appendix is an integral part

of a Standard, whereas an ‘informative’ appendix is only for information and guidance

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SECTION 1 SCOPE AND GENERAL

1.1 SCOPE 4

1.2 NEW DESIGNS AND INNOVATIONS 4

1.3 REFERENCED DOCUMENTS 4

1.4 DEFINITIONS 4

SECTION 2 SYSTEM REQUIREMENTS 2.1 GENERAL 5

2.2 LOCATION AND ACCESS TO SPRINKLER CONTROL ASSEMBLIES 5

2.3 LOCATION AND ACCESS TO FIRE MAIN ISOLATION VALVES 5

2.4 ACCESS TO FIRE HYDRANTS 5

2.5 PROTECTION OF SUPPLY PIPING 5

2.6 FIRE MAIN (RING) RETICULATION 5

2.7 PRESSURE REDUCING VALVES 6

2.8 WATER SUPPLIES 6

2.9 FIRE SERVICE BOOSTER 6

2.10 FIRE ALARM INITIATION 6

2.11 FIRE ALARM CIRCUITS 6

2.12 MONITORING OF ISOLATING VALVES 7

SECTION 3 PIPES, VALVES AND FITTINGS 3.1 GENERAL 8

3.2 VALVES 8

SECTION 4 TESTING 4.1 GENERAL 8

4.2 PRE-TEST PREPARATION 8

4.3 HYDROSTATIC TEST 8

4.4 FLOW TESTS 8

4.5 RECORDING OF TEST RESULTS 8

APPENDICES A REFERENCED DOCUMENTS 9

B LOCATION OF FIRE HYDRANTS AND SPRINKLER CONTROL VALVES 10

C SYSTEM PHILOSOPHY 13

D SYSTEM RESISTANCE CURVE FOR COMBINED SPRINKLER AND HYDRANT SYSTEMS 18

E WIRING SYSTEMS RATING 20

F TYPICAL SPRINKLER CONTROL ASSEMBLIES AND PRESSURE CONTROL STATIONS 22

First published as AS 2118.6 — 1995.

STANDARDS AUSTRALIA

Australian Standard Automatic fire sprinkler systems

Part 6: Combined sprinkler and hydrant

1.1 SCOPE This Standard sets out the minimum requirements for the installation,commissioning and testing of a combined sprinkler and hydrant system, for installation inmultistorey buildings as an alternative option to using separate sprinkler and hydrant systems,

or separate sprinkler and hydrant installations utilizing a combined fire main (see AS 2118.1)

1.2 NEW DESIGNS AND INNOVATIONS Any alternative materials, designs, methods

of assembly, procedures and similar that do not comply with the specific requirements of thisStandard, or are not mentioned in it, but give the equivalent results to those specified are notnecessarily prohibited

1.3 REFERENCED DOCUMENTS A list of referenced documents is given inAppendix A

1.4 DEFINITIONS For the purpose of this Standard the definitions given in AS 2118.1,

AS 2419.1, AS 2484.1, AS 2484.2, AS 3500.0 and that below apply

1.4.1 Combined system — an integrated system of sprinkler and fire hydrant reticulation

where the sprinkler system is fed from a fire main designed to supply the concurrent waterrequirements of both the sprinkler and hydrant system

S E C T I O N 2 S Y S T E M R E Q U I R E M E N T S

2.1 GENERAL Except as modified by this Standard, combined systems shall comply withthe requirements of AS 2118.1, AS 2419.1 and AS 2941

2.2 LOCATION AND ACCESS TO SPRINKLER CONTROL ASSEMBLIES Sprinkler

control assemblies shall be located within —

Sprinkler isolation valves shall be located on each storey

A ‘Sprinkler Stop Valve Inside’ wall plate shall be affixed externally to the egress door ofthe common fire-rated exit where it discharges to a public place or open area(see Appendix B, for examples of required valve locations)

2.3 LOCATION AND ACCESS TO FIRE MAIN ISOLATION VALVES Access to anyfire main isolation valve shall be from within a fire-rated exit (stairway) or a fire-rated roomdirectly accessible from the fire-rated exit

2.4 ACCESS TO FIRE HYDRANTS Fire hydrants shall not be located within a lockedenclosure

Hydrants, where located in an enclosure, shall remain accessible at all times

2.5 PROTECTION OF SUPPLY PIPING Piping between the source of water supply andthe ring main/s shall be subject to the fire resistance and mechanical protection requirements

of AS 2118.1 and AS 2419.1

2.6 FIRE MAIN (RING) RETICULATION

2.6.1 Pipe sizing Piping to which sprinkler installations and fire hydrants are directlyconnected shall be reticulated through the building in the form of ring mains (one ring foreach pressure zone) Piping shall be sized by hydraulic calculation (see AS 2118.1) subject

to the following minimum pipe diameters —

The vertical portions of the ring main pipes shall be located within separate fire-rated exits(stairways) or fire-rated riser shafts In the case of adjoining pressure zones, which do notshare a common horizontal cross connection, each cross connection shall be located withinits own pressure zone

2.6.2 Pressure zones Separate pressure zones shall be provided where —

The number of pressure zones shall not be less than one for each 50 m rise in buildingheight

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2.6.3 Isolation valves Each pressure zone shall incorporate isolation valves arranged sothat —

can remain operable upon isolation in any fire main (ring) section between valves

NOTE: See Appendix C, Figures C3 to C5for typical schematic system configurations.Isolation valves shall be located such that not more than four storeys of sprinklers would beisolated

2.7 PRESSURE REDUCING VALVES Where pressure reducing valves are incorporatedthey shall be provided with an isolating valve on each side of the pressure reducing valve

2.8 WATER SUPPLIES

2.8.1 Combined system water flow rate The combined system water flow rate shall bethe aggregate of the fire hydrant requirement, in accordance with AS 2419, and the sprinklerrequirement, in accordance with AS 2118.1, taken at the hydraulically most favourablelocation determined in accordance with Appendix D

2.8.2 Source of water supply The system water supply shall be sourced from —

capacity which is sufficient to provide water to the combined fire hydrant and sprinklersystem for the duration required by AS 2419.1 and AS 2118.1

NOTE: The tanks may be located at high or low level and pumps shall be fitted as required

town mains being capable of providing water to the installation at the necessarypressure and flow to permit proper operation, either with or without pumps, having stopvalves so arranged that in the event of a breakdown, anywhere in the system, at leastone of the mains to the installation can remain operative

installed if necessary, of providing water at the necessary pressure and flow for properoperation of the combined installation

2.8.3 Fire mains (feed) A separate fire main (feed) shall be connected to each zone, orwhere a cascade system using pressure reducing arrangements is used, duplicate fire mains(feed) shall be connected to the highest zone

2.9 FIRE SERVICE BOOSTER Each zone shall be equipped with a booster facility forthe connection of a fire authority pump appliance The booster facility shall comply with therequirements of AS 2419.1

2.10 FIRE ALARM INITIATION The sprinkler fire alarm shall be initiated inaccordance with the requirements of AS 2118.1

2.11 FIRE ALARM CIRCUITS Each fire alarm initiating device shall be wired to a FireIndicator Panel (FIP) constructed in accordance with AS 1603.4

The sprinkler alarm on each floor shall provide a separate indication at the FIP, clearlyidentified as a sprinkler alarm for that particular floor

Sprinkler fire alarm transmission from the FIP to the local fire authority shall be via adedicated landline Where the FIP contains other detection systems they shall be connected

to the local fire authority in accordance with the requirements of AS 1670

Wiring between each switch and the FIP shall be in fire-rated wiring, having a systemperformance of at least WS52W, in accordance with AS 3013 (see Appendix E).

2.12 MONITORING OF ISOLATING VALVES Each sprinkler isolation valve, firemain isolation valve or any valve capable of isolating the water supply to the system,excluding valves under the control of the water authority, shall be monitored separately atthe FIP Monitors shall comply with the requirements of AS 2118.1 and AS 2419.1

Wiring between each switch and the FIP shall be in fire-rated wiring, having a systemperformance of at least WS52W, in accordance with AS 3013

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S E C T I O N 3 P I P E S , V A L V E S A N D F I T T I N G S

3.1 GENERAL Pipes, valves and fittings shall comply with the requirements of

AS 2118.1, AS 2419, and AS 4118 (all parts)

3.2 VALVES Valves and ancillaries in the system shall comply with the requirements of

AS 4118 as follows:

4.1 GENERAL The tests detailed in this Section shall be conducted at commissioningtime and at other times thereafter as required by the regulatory authority

4.2 PRE-TEST PREPARATION Upon completion the combined system shall be flushed

to remove any debris which may have accumulated within the pipework during construction

NOTE: The sprinkler portions of the system may be tested to 1500 kPa

4.4 FLOW TESTS A flow test shall be carried out within the fire main (ring) in eachpressure zone to prove that the water supply is capable of meeting the combined flow andpressure requirements of the zone

The pump shall be tested to prove that it is capable of delivering 50% of flow required at65% of the pressure required by the combined system

At each test facility location provision shall be made for a drain to accommodate thedischarge from the test

4.5 RECORDING OF TEST RESULTS Test results shall be recorded in accordancewith the requirements of AS 2118.1 and AS 2419.1

APPENDIX A

REFERENCED DOCUMENTS

(Normative)

AS

commissioning

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FIGURE B2 LOCATION OF FIRE HYDRANT ANDSPRINKLER CONTROL ASSEMBLIES

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FIGURE B3 SPRINKLER CONTROL ASSEMBLIES LOCATED

WITHIN NOMINATED STAIR

FIGURE C2 SYSTEM COMPONENT TERMINOLOGY

FIGURE C3 ZONE PRESSURE CONTROL — SCHEME 1

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FIGURE C4 ZONE PRESSURE CONTROL — SCHEME 2

FIGURE C5 ZONE PRESSURE CONTROL—SCHEME 3

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with the requirements of AS 2118)

to maintain Qs above

array above the ‘hydrant’ connection to the combined sprinkler/hydrant riser

maintain Qh above

System resistance curves can be plotted using the following equations:

For the hydrant system The resistance curve for the combined sprinkler and hydrant systems is obtained by plottingthe sum of the sprinkler and hydrant flows at common pressures See Figure D1

The pressure requirements at the pump discharge is the sum of the required combined system

sprinkler in the hydraulically most disadvantaged array

to the ‘sprinkler’ connection calculated at the required combined system flowrate

FIGURE D1 TYPICAL PRESSURE/FLOW CURVES FOR PUMPS

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