b.29 mechanical piping - vn - centrepoint

5/23/2018 B.29 Mechanical Piping - VN - Centrepoint

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MECHANICAL PIPING

The English language version prevails. u tin ting Anh khi c tranh ci.

Centrepoint Page 1 of 24 of B.29 18 September 2007

MECHANICAL PIPING HTHNGNG NG CKH

1 GENERAL 1 TNG QUT

1.1 FUNCTIONAL DESCRIPTION 1.1 M T

The piping scope of work covers thepipework for the chilled water,condenser water, sprinkler, hydrants &hosereel, liquid fuels pipework.

Phm vi cng vic hthng ng ngbao gm ng ng cho hthng ncti lnh, nc gii nhit dn ngng, uphun cha chy tng, hthng hngcha chy, cun vi cha chy, nhinliu lng.

1.2 CROSS REFERENCES 1.2 THAM CHIU CHO

GeneralComply with the General Requirementsworksection.

Tng qutPh hp vi chng Nhng yu cuchung.

Related worksections

Refer to the following worksections:Mechanical General Requirements,Adhesives, Sealants, Fasteners, FireStopping, Service Trenching, Acoustic &Vibration Control, Tanks & Vessels,

Pumps, Mechanical Controls,Mechanical Piping Insulation,Mechanical Commissioning.

Nhng chng lin quan

Tham chiu n cc chng sau:Nhng yu cu chung v c kh, Keodn, Cht trt kn v Phkin kp cht,Cht ngn chy, H thng mng,

Kim sot n v rung ng, H thngBn cha & Bnh cha, Hthng Bm,Hthng iu khin ckh, Cch nhitng ng ckh, Chy thv nghimthu phn ckh.

1.3 STANDARD 1.3 TIU CHUN

GeneralTo AS 4041.Valves: Australian or British Standards

Tng qutTheo tiu chun AS 4041Van: Tiu chun Anh hoc c

1.4 DESIGN 1.4 THIT K

PerformanceBase design pressures on 1.5 times- the maximum hydrostatic head at the

location; and/or- the pump shut off head at the

maximum impeller size.Which ever is the greater.

c tnhp sut thit kbng 1,5 ln- ct p thy tnh ln nht ti vtr; v/

hoc- p lc tt bm vi kch thc cnh

cng tc ln nht.Ly gi trno ln hn.

SystemProvide piping systems complete with allnecessary piping, valves, supports,guides, drains, vents, expansioncompensation and all fittings necessaryfor their safe and efficient operation.Installation: Follow the line of walls,ceilings, etc., and include all necessaryoffsets and arrange to avoid interferencewith the building or other servicesregardless of whether or not theseaspects are shown on the drawings.

Sizing: Allow to modify pipe sizes tomeet the performance of this

HthngCung cp h thng trn gi vi tt cng ng cn thit, van, chi tit treo, chi tit dn hng, ng thot nc,ng thng hi, b trgin nv tt ccc phkin cn thit hthng hotng c hiu quv an ton.Lp t: Chy thng theo cc tng,trn, v tt c cc thay i cao cn thit v lp t trnh gy tr ngicho to nh hoc cc h thng khckhng k rng n c hoc khngc thhin trn bn v.Kch thc: cho php thay i kchthc ng ng p ng c cng


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MECHANICAL PIPING



specification. sut/ c tnh ca ti liu Qui nh kthut ny.

Plant accessGeneral: Make adequate provision forplant isolation and maintenance. Locatevalves and other components in ceilingswhere they are easily accessible and

where access or leaks will not causeinconvenience or risks to occupants, ordamage to water sensitive equipment.

Connections: Arrange connections toplant to permit dismantling of the plantwithout disturbing other pipes and topermit removal of the plant withoutremoval of the piping. Provide union onat least one side of each screwed valveand screwed pipeline componentrequiring removal for inspection ormaintenance. Make all connections toplant by one of the following methods:

- Flare compression joints (up to 20mmcopper and only where there is novibration).

- Screwed brass unions (up to 50mmsize and for pressures up to 800kPa).

- Bolted flanges (no limitation).

Tip cn vi hthngTng qut: Phi lp t sao cho c thc lp v bo tr cho hthng. nh vvan v cc phkin khc trong trn nhni m c th d dng tip cn v s

tip cn v r rkhng gy bt tin haynguy hi cho nhn vin bn trong, hoch hng cho cc thit b d b h donc.u ni: lp t cc u ni n thit bcho php tho d thit bm khngnh hng n ng ng khc v thori thit b m khng cn tho ng.Trang bmt racco ti thiu mt uca mi van ni ren v phkin ngng ni ren i hi phi kim tra hocbo tr. Thc hin tt c cc u nin thit bbng mtrong cc phngphp sau:- Mi ni nn l u (ng ng ng

knh n 20mm v chkhi khng crung ng).

- Racco ng thau ni ren (kch thcn ng knh 50mm v p sut n800kPa)

-Ni mt bch bt bulon (khng bgii hn)

2 QUALITY 2 CHT LNG

2.1 SAMPLES 2.1 MU VT T

Sample PanelsGeneral: Supply a sample panel of all

mechanical piping product, valves &accessories used.

Bng mu vt tTng qut: trnh duyt mt bng gn

cc mu vt tca tt ccc mu ngckh, van v phkin sdng.

2.2 SUBMISSIONS 2.2 TRNH DUYT

Shop DrawingsSubmit drawings and schedules showingthe layout and details of the system,including- location, type, grade and finish of

piping, fittings and pipe supports.

Bn vthi cngTrnh duyt bn vthi cng v bng litk th hin b tr v chi tit ca hthng, bao gm- V tr, chng loi, cp v bmt

hon thin ng, phkin, v chi tittreo .

Pipework & fittingsSubmit product data and type test

information on the following,- Pipework- Fittings

ng ng v phkinTrnh duyt ti liu sn phm v kt

quthnghim mu cho- ng ng-phkin

ValvesGeneral: For each, submit a scheduledetailing reference number, valve type,size, manufacturer, manufacturersreference and valve tag.Calibrated balancing valves: For eachtype and size of valve, submit amanufacturers calibration chart relating

VanTng qut: Mi loi van, trnh duytmt bng lit k th hin chi tit stham chiu, chng loi van, kch thc,nh sn xut, m sca nh sn xut vthtn.Van cn bng c chia : cho mi loiv cvan, trnh gin nh c t


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pressure drop to fluid flow across thevalve opening range. Submitindependent test reports giving accuracyand repeatability tolerances.Automatic/dynamic system balancingvalves: For each type and size of valve,submit a manufacturers report verifying

a flow rate accuracy of 5% or better ismaintained over the selected pressuredifferential control range.

nh sn xut lien quan tr lc dngchy qua van chm. trnh bnbo co c lp a ra dung sai chnhxc v lp li.Van cn bng t ng/ng lc: chomi loi v cvan, trnh bo co canh sn xut xc minh sai s 5% lu

lng hoc tt hn c duy tr dyiu khin p sut hot ng thay i.

2.3 QUALIFICATIONS 2.3 NNG LC

Examination and testing for qualificationof welding and brazing procedures or ofwelding and brazing personnel shallcomply with AS/NZS 3992, OR anapproved local authority.Welding and brazing personnel shallsupply current & certified certificatesdemonstrating their skill level.Welding and brazing personnel shall be

required to complete a welding and/orbrazing test as applicable which shall betested by an approved authority usingultrasound or other approved techniques.Welders shall be tested monthly, andreport supplied to the Project Manager.

Kim tra v th nghim xc nhnng lc ca thtc hoc thhn thauv hn thp phi tun th tiu chunHOC c mt cquan thm quyna phng c ph duyt.Th hn thau v thp phi trnh duytGiy chng nhn hin ti chng minhcp bc th.Thhn thau v thp sc yu cu

thc hin mt cuc kim tra hn thpv/ hoc hn thau tng thch vi ktquhn sc thnghim bi mt cquan thm quyn c ph duyt bngcch siu m hoc k thut khc cph duyt. Thhn phi c kim trahng thng, v trnh bo co cho Gimc Dn.

3 PIPING 3 NG NG

3.1 COPPER PIPING 3.1 NGNG

PipesStandard: To AS 1432 type B, hard

drawn.

ng ngTiu chun: theo tiu chun AS 1432

type B, ko ngui.JointingSelect from the following except where aspecific jointing method is shown on thedrawings or specified elsewhere:

- Silver brazed capillary joints.- Brass flanges with brass nuts and

bolts.- Flare compression joints: 20DN

nominal size and only where novibration occurs.

- Proprietary grooved joints.

Ni ngChn trong cc cch sau trkhi c mtphng php ni c bit c yucu trong bn v hoc i hi nikhc:- Hn bc cho cc mi ni ng mao

dn.- Mt bch thau c bulon v ai c

thau.- Mi ni nn l u: ng knh danh

nh 20 v chni khng c rungng.

- Mi ni s dng ph kin cn rnhnguyn bmua sn.

FittingsCapillary fittings including adaptorcapillary fittings with threaded ends orcompression-type connector ends: To AS3688, of copper or dezincification-resistant copper alloy.Compression fittings including adaptorcompression fittings with connector-endsfor screwed or capillary joints: To AS3688, flared type, of copper or

PhkinPhkin mao dn bao gm loi adapterc u ren hoc u ni kiu p: theotiu chun AS 3688, lm bng nghoc hp kim ng chng oxy ho khkm.Phkin kiu p bao gm phkin niadapter kiu p c u ni ren hoc nimao dn: theo tiu chun AS 3688,kiu l u, lm bng ng hoc hp


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dezincification-resistant copper alloy.Unions: Bronze, proprietarymanufacture, with ground or accuratelymachined face joints.Flanges: Brazing metal to AS 2129.

Demountable joints: Expand pipes intoflanges and braze.

kim ng chng oxy ho khkm.Racco: ng thic, sn xut nguyn bmua sn, c mi ni c b mt mihoc gia cng chnh xc trn my.Mt bch: kim loi hn thau theo tiuchun AS 2129.Mi ni tho lp: ng ko di n cuimt bch v hn thau.

Permanent jointsProvide brazed slip joints. Provide eithercapillary fittings, or expand one pipeover the other leaving a minimumclearance and an effective overlap.

Mi ni cnhThc hin mi ni b trhn thau. Sdng hoc phkin mao dn, hoc kodi mt ng sang ng kia to khongcch nh nht v mt s gi u cnthit.

Slip joint overlap table Bng gi tr gi u cho mi ni btr

Nominal pipe size, DN Overlap (mm)

Kch thc ng danh ngha Gi trgi u

15, < 20 12

20, < 32 15

32, < 50 25

50, < 80 30

80, < 125 35

125, < 200 40

3.2 STEEL PIPING 3.2 NG THP

Pipe for closed systemsIf water in the system does not come intocontact with the atmosphere, providepipe to

- AS 1074;- BS EN 10216-1;- BS EN 10217-1;- API 5L; or- ASTM A53/A53M.

ng ng cho hthng knNu nc bn trong h thng khngtip xc vi kh quyn, s dng ngtheo tiu chun:

- AS 1074;- BS EN 10216-1;- BS EN 10217-1;- API 5L; or- ASTM A53/A53M.

Pipe for aerated systemsIf water in the system comes into contactwith the atmosphere, provide galvanisedpipe, either seamless, or welded with theweld normalised (eg with ERW process),pipe to API 5L grade B.Note that galvanised pipe should not be

welded unless it is hot dipped again.

ng ng cho hthng ng hNu nc bn trong h thng tip xcvi kh quyn, s dng ng c trngkm: hoc hn bng qu trnh bnhthng ho (ngha l qu trnh hn intr in ERW), ng theo tiu chunAPI 5L cp B.

Lu rng ng trng km khng nnhn trkhi sc mnhng nng li,

JointingGeneral: Select from the followingexcept where a specific jointing methodis shown on the drawings or specifiedelsewhere:

- Black steel pipe:

. Butt welded.

. Welded-on flanges.

Ni ngChn trong cc cch sau trkhi c mtphng php ni c bit c yucu trong bn v hoc i hi nikhc:

- ng thp en

. Hn u u ni tip

. Mt bch hn


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. Proprietary grooved joints.

- Galvanized steel pipe:

. Screwed and socketed up to 50 mmsize.

. Galvanized screwed flanges.

. Underground pipe: Welded and hot

dip galvanized after fabrication toAS/NZS 4680.

. Proprietary grooved joints.

. Mi ni s dng bch cn rnhnguyn bmua sn.

- ng thp trng km:

. Ren v lp ui cho ng ti 50mm

. Mt bch ren trng km

. ng ngm di t: Hn v trng

km nhng nng sau ch to theoAS/NZS 4680.

. Mi ni s dng ph kin cnrnh nguyn bmua sn.

FittingsIn welded pipe: Butt-weld fittings (e.g.bends and tees). Provide sweep tees andlong radius type bends.Steel for fabricated pipe fittings: Samegrade and wall thickness as the pipe.Fittings for non-vertical lines: Provideeccentric reducing fittings installed toavoid gas binding, liquid retention or

both.

Phkini vi ng hn: sdng phkin hni tip (ngha l co v t). Sdng tcong v c bn knh ln.Thp lm ph kin ng ng giacng: cng loi v cng chiu dy ving.Phkin cho tuyn ng lp nghing: sdng ph kin gim lch tm trnh

sgikh, cht lng hay chai.

3.3 PVC PIPING 3.3 NG PVC

StandardsUnplasticised pipes and fittings (PVC):To AS/NZS 1477.Oriented PVC (PVC-O) pipes: ToAS 4441 (Int).Solvent cement: To AS/NZS 3879.

InstallationStandard: To AS 2032.

JointingPermanent joints: Solvent cement.Demountable joints:

- Piping DN 50: Threaded fittings.

- Piping > DN 50: Flanges with backingrings.

Tiu chunng v ph kin khng do (PVC):theo AS/NZS 1477.ng ngm PVC (PVC-O): theoAS 4441 (Int).Keo: theo AS/NZS 3879.Lp t:Tiu chun: theo AS 2032.Mi niMi ni vnh vin: keoMi ni tho c:ng DN 50: phkin renPiping > DN 50: mt bch m trn

4 VALVES AND FITTINGS 4 VAN V PHKIN

4.1 VALVES AND FITTINGS -GENERAL

4.1 VAN V PH KIN TNGQUT

ComponentsValve size: Generally at least thenominal pipe size, unless a smaller size

is necessary for throttling purposes orflow measurement.Insulated valves: Provide extended shaftsor bodies to butterfly and ball valves toallow full thickness of insulation withoutrestricting movement of hand-wheel orlever.Automatic control valves: Conform totheAutomatic controlsworksection.Connections:- Valves DN50: Screwed to AS

Cu kinKch cvan: Ni chung ti thiu bngkch thc ng, trkhi cn c mt kch

thc nhhn chnh tit lu hay olu lng.Van c cch nhit: Thc hin kodi trc hay thn n van tit lu bmhoc van bi cho php bc cch nhit dy yu cu m khng gy trngi cho dch chuyn ca tay van trnhoc tay gt.Van iu khin t ng: ph hp vichng iu khin tngMi ni:


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1722.1.- Valves > DN50, valves in headers:

Flanged to AS 2129.Handwheels and handles: Removable,with the direction of closing markedpermanently on handwheels.Copper alloy valves: Dezincificationresistant and stamped accordingly.Valves for water circuits open to airincluding open condenser water circuits:Body bronze for sizes DN50.

- van DN 50: ni ren theo tiu chunAS 1722.1.

- van > DN 50, van trong ng gp: nimt bch theo tiu chun AS 2129.

Tay van trn v tay gt: tho c, vichiu ng c ghi c nh trn tayvan.

Van hp kim ng: chng oxy ho khkm v ng du.Van ca tuyn ng h bao gm cmch nc dn ngng h: thn vanng thic i vi kch thc DN 50.

InstallationValves: If practicable, install with thestem horizontal.Non-return valves: Provide at least 6pipe diameters of straight pipe on theupstream side.Flow measuring valves: Install withpressure tappings accessible.

Lp tVan: Nu kh thi, lp t trng mtrn phng ngang.Van mt chiu: lp c on ng thngdi ti thiu 6 ln ng knh phathng ngun.Van o lu lng: lp t c l gnng hp sut tip cn c.

Valve IdentificationGeneral: Tag all valves and flowmeasuring devices for identificationpurposes. Provide a circular brass discattached to the valve by a stainless steelwire drawn through the holes in the disc,on each valve provided with operatinghandwheel or lever stamp the valveidentification mark on the disc incharacters 10mm high.Valves without operating handwheels:Mark by aluminium or brass strap 20mmwide by 90mm long stamped in the samemanner as the valve identification discs.Attach by stainless steel wire to the body

of the valves.

Nhn bit vanTng qut: gn th cho tt c cc vanv thit bo lu lng nhn dng.Sdng mt a thau trn nh vo vanbng dy thp khng rlun qua ltrna, trn mi van c tay van trn hoctay gt ng du nhn bit van trn abng chcao 10mm.

Van khng c tay ng m: Ghi nhnbng dy ng hoc nhm rng 20mmdi 90mm ng du bng cng cchnhl a nhn dng van. Gn ln thnvan bng dy thp khng r.

4.2 WATER VALVE TABLES 4.2 BNG PHN LOI VANNC

Copper piping systems: Open-circuit condenser cooling water systems

Hthng ng ng: Hthng ng nc lnh dn ngng mch h

Function Valve type Size range (mm)

Copper alloy wedge gate, 15 65

Butterfly 65

Isolating

Cast iron wedge gate or 80

Copper alloy lift or swing 15 65Non-returnCast iron lift or swing 80

Copper alloy globe, needle 15 65

Butterfly 65

Throttling or balancing

Proprietary integral globe No size limitation

Level control Copper alloy ball float 15 50

Copper alloy 15 65Pressure relief

Cast iron 80


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Bleed Ball 15 65

Gauge Ball 15 65

Drain Ball 15 65

Steel and closed copper piping systems: Chilled water, heating water, closed

circuit condenser cooling water systemsHthng ng ng v ng thp kn : Hthng ng nc ti lnh, nc nng,ng nc dn ngng mch kn.


Copper alloy wedge gate 15 50

Ball or diaphragm 15 65

Isolating

Cast iron wedge gate ordiaphragm

80

Copper alloy lift or swingcheck

15 50Non-return

Cast iron lift or swingcheck 65 100

Copper alloy globe, needleor diaphragm

15 65

Cast iron globe ordiaphragm

80


Proprietary integral globewith presstappings/locking stem

No size limitation

Copper alloy ball float 15 65Level control

Cast iron ball float 80

Copper alloy type 15 65Pressure relief

Cast iron type 80

Air relief Copper alloy automatic airvent

15 20

Copper alloy 15 65Strainer

Cast iron 80 150

Copper alloy 15 100Pressure reducing

Cast iron 15 100

Bleed Ball 15 65

Gauge Ball 15 65

Drain Ball 15 65

Plastic piping systems: Condenser water, cooling water systems

Hthng ng nha: Hthng ng nc gii nhit dn ngng, nc thp giinhit


Isolating Copper alloy wedge gate,ball or diaphragm

15 65


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Cast iron wedge gate ordiaphragm

80

Copper alloy lift or swingcheck

15 65Non-return

Cast iron lift or swingcheck

80

Copper alloy globe, needleor diaphragm

15 65

Cast iron globe ordiaphragm

80


Proprietary integral globewith presstappings/locking stem

No size limitation

Level control Copper alloy ball float 15 50

Pressure relief Copper alloy type 15 50

Copper alloy automatic airvent

15 20

Strainer copper alloy 15 65

Air relief

Cast iron 80 150

Bleed Ball 15 65

Gauge Ball 15 65

Drain Ball 15 65

4.3 WATER VALVE SELECTION 4.3 CHN VAN NC

Working pressure rating: Minimum 1.4MPa and to suit the system pressurerequirements.

Working temperature rating: To suit thesystem requirements.Limitations on size and type:- Isolating valves:

. Gate valves: No limitation.

. Ball valves: DN50.

. Butterfly valves: > DN50.- Throttling valves:

. Globe valve: No limitation.

. Calibrated balancing valve: Nolimitation.

. Butterfly valve: > DN65

Cp p sut lm vic: ti thiu 1,4MPav ph hp yu cu p sut hthng.Khong nhit lm vic: p ng yu

cu ca hthng.Gii hn ca kch cv chng loi:- Van ng m:

. Van cng: khng gii hn

. Van bi: DN 50.

. Van tit lu bm:> DN 50- Van tit lu:

. Van cu: khng gii hn

. Van cn bng hiu chun:khng gii hn

. Van tit lu bm: > DN 65

Gate valvesDescription: Straight-through flow, solidwedge type, inside screw design,medium pattern.Standards:- Bronze valves: To AS 1628.- Flanged cast iron valves: To AS 3579.

Construction:

Van cngM t: s dng cho dng chy thng,kiu chm cng, thit k ren trong, lpattern trung bnh.Tiu chun:- Van ng thic: theo tiu chun

AS 1628.- Van gang bt mt bch: theo tiu

chun AS 3579.Cu to:


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- Body:. DN80: Bronze.. > DN80: Cast iron.

- Seats: Integral seats for bronze valves,replaceable bronze seats for cast ironvalves.

- Thn:. DN 80: ng thic.. > DN 80: gang.

- Mt ta: mt ta tch hp i vivan ng thic v c ththay thivi van gang.

Ball valvesDescription: Full bore pattern withhandle parallel to the direction of flowwhen the valve is fully open.Construction:- Body: Bronze.- Ball: Hard chromed brass.- Gland seal: Adjustable.- Seat: PTFE.Reduced bore ball valves: Constructed asfor full bore ball valves. May be used fordrains, air vents and gauges.

Van biM t: l ln thng thng vi tay gtsong song vi chiu dng chy khi vanmhon ton.Cu to:- Thn: ng thic- Bi: ng thau mchome cng- Vng bt m: iu chnh c- Mt ta; PTFEVan bi lgim: cu to ging nhvanbi. C th s dng cho thot nc, xkh v gn ng h.

Angle valves

Description: 90 deg angle valve, withquick turn tap fitting.Construction:- Body: Bronze, chromed.- Ball: Hard chromed brass.- Gland seal: Adjustable.- Seat: PTFE.

Van gc

M t: van gc 90 , vi phkin renquay nhanh.Cu to:- Thn: ng thic, mchrome- Bi: ng thau mchrome cng- Vng bt m: iu chnh c- Mt ta: PTFE

Butterfly valvesDescription: Lug type.Standard: To BS 5155.Operation:

- DN150: Positive locating operatingbar, parallel to the disk with notchplate.

- > DN150: Geared or motorisedoperators.

Construction:- Body: Cast aluminium or cast iron.- Shaft: Stainless steel.- Disc: Bronze generally, stainless steel

for condenser water systems.- Seat: Bonded EPDM.

Van tit lu bmM t: kiu camTiu chun: theo BS 5155Hot ng:

- DN 150: thanh nh v ch ng,song song vi a c tm kha hnhV.

- > DN 150: iu khin mt hocbnh rng.

Cu to:- Thn: nhm c hoc gang.- Trc: thp khng r- a: ng thic ni chung, thp

khng r cho h thng nc dnngng.

- Mt ta: Bonded EPDM

Non-return valves

Flanged valves for water: To AS 4794.Disc type:- Body: Stainless steel or bronze.- Disc and spring: Stainless steel.

Swing type: To AS 1628.- Body: Bronze or cast iron to AS 3578.- Plates: Bronze or stainless steel.Dual flap type:- Body: Cast iron.

Van mt chiu

Van mt bch cho nc: theo tiu chunAS 4794.Kiu a:- Thn: thp khng rhoc ng thic- a v l xo: thp khng rKiu quay: theo tiu chun AS 1628- Thn: ng thic hoc gang theo tiu

chun AS 3578- Tm: ng thic hoc thp khng rKiu 2 np:


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- Pin and spring: Stainless steel.- Seat: Integral nitrile rubber.- Plates: Bronze or stainless steel.

- Thn: gang- Cht v l xo: thp khng r- Mt ta: tch hp cao su nitrile- Tm: ng thic hoc thp khng r

Globe valvesDescription: Inside screw design.

Construction:- Body:

. DN50: Bronze.

. > DN50: Steel.- Stem and gland: Forged brass.

Van cuM t: thit kren trong.

Cu to:- Thn:

. DN 50: ng thic.

. > DN 50: thp.- Ty v np bt: ng thau ti.

Calibrated balancing valvesDescription: Continuously adjustablegraduated limit stop for precise setting ofthe maximum valve opening, a numericindication of valve opening position, andpressure tappings across the variableorifice.Construction:

- Body: Copper alloy.Seat: PTFE.

Van cn bng hiu chunM t: ci chn chia iu chnh lintc ci t chnh xc gc m cavan, mt ch s th hin v tr m cavan, v l ren gn ng h p sutthng qua lnh ckhc nhau.Cu to:- Thn: hp kim ng

Mt ta: PTFE

Automatic/dynamic system balancingvalvesDescription: Pre-calibrated specialpurpose valve which automaticallycontrols flow rate within 5% accuracy,with an internal spring loaded cartridgecontrol mechanism and external tappingsfor pressure and temperature.Construction:- Body: To suit the piping and fluid.- Cartridge: Passivated stainless steel,

spring loaded type, incorporating avariable ported piston stamped withthe manufacturers identificationnumber.

Use dynamic balancing valves on allconstant flow fan coil units (those fancoil units with on/off valves).

Provide dynamic balancing valveswith integral shutoff valves, or installa separate shut off valve (gate type).

Van cn bng ng/ tngM t: van hiu chun trc nhm mcch c bit tng kim sot lulng trong phm vi sai s5%, c ccu iu khin dng hp c l xo bntrong v l ren ngoi gn p k vnhit k.Cu to:- Thn: tng thch vi ng v cht

lng- Hp: thp khng r, kiu ti l xo,

hp nht vi mt piston nhiu lthng c ng du m snhn dngca nh sn xut.

Sdng van cn bng ng cho tt ccc FCU c lu lng cnh (nhngFCU c gn van ng m)

Lp t van cn bng ng nguynb vi van kho, hoc lp t ringvan kho (van cng).

Pressure relief valvesDescription: Direct acting, spring loadedwith adjustable setting.Standard: To AS 1271.

Construction:- Body: Bronze or cast iron.- Valve disc and seat: Bronze.

Van xpM t: tc ng trc tip, ti l xo, cthiu chnh gi trci t.Tiu chun: theo AS 1271

Cu to:- Thn: ng thic hoc gang- a van v mt ta: ng thic

Pressure reducing valvesDescription: Self actuated, spring loadedwith adjustable setting.Construction:- Body: Bronze or cast iron.- Valve disc and seat: Bronze.

Van gim pM t: t hot ng, ti l xo, c thiu chnh gi trci t.Cu to:- Thn: ng thic hoc gang- a van v mt ta: ng thic


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Ball float valvesDescription: Copper or plastic float withstainless steel or copper linkage.Copper alloy: To AS 1910. Bronze body,needle and pins.Cast iron: Cast iron body, bronze needleand pins.

Van phao dng biM t: ng hoc phao nha c thanhni bng ng hoc thp khng r.Hp kim ng: theo AS 1910. Thn,kim v cht ng thic.Gang: thn gang, kim v cht ngthic.

StrainersSelection: 15kPa maximum pressuredrop.Construction:- Body: Bronze or cast iron.- Screen: Stainless steel.Strainers >65mm diameter: Fit a 25mmball valve blowdown.

Blc chYChn la: st p ti a 15 kPaCu to:- Thn: ng thic hoc gang- Mng: thp khng rBlc chY c ng knh > 65 mm:gn van bi xng knh 25mm.

Automatic air ventsDescription: Float operated.Construction:- Body: Copper alloy.

- Float: Non metallic.- Seat: Stainless steel.

Van xkh tngM t: vn hnh dng phao niCu to:- Thn: hp kim ng

- Phao ni: phi kim loi- Mt ta: thp khng r

Vacuum breaker valvesDescription: Ball valve operation.Construction:- Body: Copper alloy or stainless steel.- Valve and seat: Stainless steel.

Van ngt chn khngM t: hot ng kiu van biCu to:- Thn: hp kim ng hoc thp khng

r- Van v mt ta: thp khng r

4.4 LIQUID FUEL VALVES ANDFITTINGS 4.4 VAN NHIN LIU LNG V

PHKIN

Selection

Pressure rating: Minimum 1.4 MPa, or tosuit system pressure requirements.Temperature rating: To suit systemrequirements.Limitations on size and type:

- Isolating valves:

. Gate valves: No limitation.

. Ball valves: DN 50.

- Throttling valves:

. Globe valve: No limitation.

Gate valvesDescription: Straight-through flow, solidwedge type, inside screw design,medium pattern.Standards:

- Bronze valves: To AS 1628.

- Flanged cast iron valves: To AS 3579.

Construction:

- Body:

. DN 80: Bronze.

. > DN 80: Cast iron.

- Seats: Integral seats for bronze valves,

Chn la

p sut danh nh: ti thiu 1,4MPa vph hp yu cu p sut hthng.Nhit danh nh: p ng yu cuca hthng.Gii hn vkch cv chng loi:- Van ng m:

. Van cng: khong gii hn

. Van bi: DN 50- Van tit lu

. Van cu: khng gii hn

Van cngM t: dng cho dng chy thng, kiunm cng, thit kren trong, lpattern

trung bnh.Tiu chun:- Van ng thic: theo AS 1628- Van gang mt bch: theo AS 3579.Cu to:- Thn:

. DN 80: ng thic.

. > DN 80: gang.

. Mt ta: mt ta tch hp i vivan ng thic, mt ta thay th


12/24

MECHANICAL PIPING



replaceable bronze seats for cast ironvalves.

Ball valvesDescription: Full bore pattern withhandle parallel to the direction of flowwhen the valve is fully open.

Construction:- Body: Bronze.

- Ball: Hard chromed brass.

- Gland seal: Adjustable.

- Seat: PTFE.

Reduced bore ball valves: Constructed asfor full bore ball valves. May be used fordrains, air vents and gauges.

Non-return valvesSwing type: To AS 1628.

- Body: Bronze to AS 1628, or cast ironto AS 3578.

- Plates: Bronze or stainless steel.

Dual flap type:

- Body: Cast iron.

- Pin and spring: Stainless steel.

- Seat: Integral nitrile rubber.

- Plates: Bronze or stainless steel.

Globe valvesDescription: Inside screw design.Construction:

- Body:

. DN 50: Bronze.

. > DN 50: Cast iron.

. Stem and gland: Forged brass.

Pressure relief valvesDescription: Direct acting, spring loadedwith adjustable setting.Standard: To AS 1271.Construction:

- Body: Bronze or cast iron.

- Valve disc and seat: Bronze.

StrainersSelection: 15 kPa maximum pressuredrop.Construction:

- Body: Bronze or cast iron.- Screen: Stainless steel.

cho van gang.

Van biM t: l ln thng thng vi tay gtsong song vi chiu dng chy khi vanmhon ton.Cu to:

- Thn: ng thic- Bi: ng thau mchome cng- Vng bt m: iu chnh c- Mt ta; PTFEVan bi lgim: cu to ging nhvanbi. C th s dng cho thot nc, xkh v gn ng h.

Van mt chiuKiu xoay: theo tiu chun AS 1628- Thn: ng thic theo AS 1628, hoc

gang theo tiu chun AS 3578.- Tm: ng thic hoc thp khng r.Kiu np i:

- Thn: gang- Cht v l xo: thp khng r- Mt ta: cao su nitrile tch hp

. Tm: ng thic hoc thp khngr

Van cuM t: thit kren trong.Cu to:- Thn:

. DN 50: ng thic.

. > DN 50: gang.Ty v np bt: ng thau ti.

Van xpM t: tc ng trc tip, ti l xo, cthiu chnh gi trci t.Tiu chun: theo AS 1271Cu to:- Thn: ng thic hoc ganga van v mt ta: ng thic

Blc chYChn la: st p ti a 15 kPaCu to:- Thn: ng thic hoc gang

Mng: thp khng r

Copper piping systems

Hthng ng ng



13/24

MECHANICAL PIPING



Cast iron wedge gate or diaphragm 80

Copper alloy lift or swing check 15 65Non-return

Cast iron wedge gate 80

Copper alloy globe, needle ordiaphragm

15 65Throttling

Cast iron globe or diaphragm 80

Pressure relief Copper alloy 15 50


Cast iron 80 150

Steel piping systems

Hthng ng thp


Copper alloy wedge gate, ball ordiaphragm

15 65Isolation

Cast iron wedge gate or diaphragm 80

Copper alloy lift or swing check 15 65Non-return

Cast iron lift or swing check 80

Copper alloy globe or diaphragm 15 100

Copper alloy needle 8 50

Throttling

Cast iron globe or diaphragm 125 150


Cast iron 80 150

5 INSTRUMENTS 5 THIT BO

5.1 INSTRUMENTS - GENERAL 5.1 THIT BO - PHN CHUNG

LocationTest plugs: Provide in each pipeconnection to every heat exchangingdevice and wherever else shown on thedrawings.Thermometer wells: Provide for eachpipe mounted temperature sensor.Pressure tappings: Provide test plugs orvalved tappings at each pump automatic

control valve and wherever else shownon the drawings.

VtrL th nghim: trang b cho mi ngni n mi thit b trao i nhit vnhng ni thhin trn bn v.Bu gn nhit k: trang bcho mi ngc gn cm bin nhit .Lren gn ng hp sut: trang blthnghim hoc lgn van iu khinmi van tng my bm v nhng

ni thhin trn bn v.

5.2 PRESSURE GAUGES 5.2 NG HP SUT

GeneralStandard: Bourdon pipe type to AS1349.Scale range: Full scale between 130%and 200% of maximum workingpressure.

Tng qutTiu chun: kiu ng bourdon theo AS1349.Khong o: gi tro c ti a gia130% v 200% p sut lm vic ti a.Cu to:


14/24

MECHANICAL PIPING



Construction:- Case: Glass filled nylon. Minimum

diameter 100mm.- Lens: UV stabilised polycarbonate.- Dial: UV stabilised polycarbonate.- Indicating pointer: Adjustable.

- Configuration: Direct mounting,bottom entry.- Bourdon pipe material: Stainless steel

for hot water systems. Phosphorbronze for other services.

- V: Nylon thy tinh. ng knh tithiu 100mm.

- Knh: polycarbonate chu tia cc tm- Mt s: polycarbonate chu tia cc

tm- Kim: iu chnh c

- Cu hnh: lp trc tip, hy.- Vt liu ng bourdon: thp khng rcho h thng nc nng. ng thicphospho dv cc hthng khc.

InstallationGeneral: Mount gauges vertically freefrom vibration. Provide gauge lineconnection cocks. If necessary, eliminateneedle fluctuations caused by pressurefluctuations, by means of either- an orifice or restrictor; or- a capillary pipe pressure pulse damper.Pressure gauge connections: For gaugesnot permanently connected seal outletsof isolating valves with flared seal capnuts.

Lp tTng qut: Lp t theo phng ngv khng brung. Lp t van nhchong ra ng h. Nu cn thit, khdaong kim do dao ng p sut, bngcch- mt lnh choc gim; hoc- van gim xung p c ng mao dn.u ni ng hp sut: i vi nghkhng u ni thng trc, nim knu ra ca van ng mbng chp knl u.

LocationProvide pressure gauges in the followinglocations or as otherwise shown on thedrawings.- pump supply 0 kPa to 150%

shutoff head, wrt static head.- pump suction - -20 kPa to + 50 kPa,

wrt static head.- supply and return flows of AHU/

PAU coils

- chiller supply and return flows

VtrCung cp ng h p sut theo v trhoc thhin khc theo nhbn v

- Bm cp: 0 kPa n 150% p lcngt, bao gm ct p tnh

- Bm ht : -20 kPa n 150% baogm ct p tnh

- Cp v hi ca dn coil PAU- Cp v hi ca chiller.

5.3 THERMOMETERS 5.3 NHIT K

Dial thermometersType: Mercury in steel.Accuracy: 1% of full scale deflection.Construction:- Case: Glass filled nylon. Minimum

diameter 100mm.- Lens: UV stabilised polycarbonate.- Dial: UV stabilised polycarbonate.- Indicating pointer: Adjustable.- Bulb: Grade 316 stainless steel.- Configuration: Direct mounting,

bottom entry.Installation: Install thermometersvertically, free from vibration, inthermometer wells.

Nhit kkimKiu: thy ngn trong thp chnh xc: 1% lch tonkhong o.Cu to:- V: Nylon thy tinh. ng knh ti

thiu 100mm.- Knh: polycarbonate chu tia cc tm- Mt s: polycarbonate chu tia cc

tm

- Kim: iu chnh c- Bu: thp khng r316- Cu hnh: lp trc tip, hy.Lp t: Lp t nhit k theo phngng, khng b rung, trong bu gnnhit k.

LocationProvide dial thermometers in thefollowing locations or as otherwiseshown on the drawings.

VtrCung cp ng h nhit theo v trhocthhin khc theo nhbn v- ng cp v hi ca dn PAU


15/24

MECHANICAL PIPING



- supply and return flows of AHU/PAU coils 0 deg to 40 deg C

- chiller supply and return flows - 0deg to 40 deg C

- cooling tower entering and returnflows - 15 deg to 50 deg C

- building CHW supply and returnflows - 0 deg to 40 deg C

- building CDW supply and returnflows - 15 deg to 50 deg C

0 40 C- ng cp v hi ca chiller 0

40 C- ng vo v ra ca thp gii

nhit 15 - 50 C- ng nc lnh cp v hi cho

ta nh 0 40 C.- ng nc cp v higii nhit

dn ngng 15 - 50 C

5.4 SENSING POINTS 5.4 CM BIN

Test plugsMaterial: Suitable for the service fluid upto maximum pressures and temperatures.Machined brass hexagon body withnordel synthetic rubber cores andgasketted brass hexagon screw cap.Installation: Screwed into socketswelded to pipes and extended above

insulation.

Nt thnghimVt liu: thch hp vi cht lng v psut, nhit ti a. Thn lc gicng thau gia cng trn my vi li caosu tng hp hnordel v nt chp renlc gic ng thau c m kn.Lp t: bt ren vo ai c hn vo ngv li ra ngoi lp cch nhit.

Thermometer pocketsConstruct for use with glass stemthermometers, from the same material asthe pipe. Weld or braze to pipes. Fillpockets with conductive medium.

Ti gn nhit ksdng vi nhit kkiu trc thytinh, cng loi vt liu vi ng ng.Hn thp hay thau vo ng. Lm yti bng vt liu dn nhit.

Thermometer wellsProvide stainless steel thermometer wellsof the separable type to enable thesensing element to be withdrawn withoutdraining the system. Screw wells into aboss welded to the pipe, to suit theinstalled sensing element. Fill wells withconductive medium.

Bu gn nhit kLp t bu gn nhit k bng thpkhng r kiu tch ring c th rtc cm bin ra m khng phi xhthng. Bu nhit k c lp ren vophn li hn vo ng, tng thch vicm bin lp t. Lm y bu bng vtliu dn nhit.

5.5 WATER FLOWMEASUREMENT

5.5 THIT B O LU LNGNC

Sensing elementType: Low loss pitot type averagingsensor, with 2 flared isolating valves forconnection of pressure lines.Material: Stainless steel.Installation: Comply fully withmanufacturers recommendation forinstallation, connection and valving.Provide manufacturers recommendedstraight lengths of pipe upstream anddownstream of tapping point. Mount in

the piping using an adaptor bushing andwelding boss.Accuracy: Within 1.5% over the rangeof flow anticipated.Stability: Within 0.125% over fiveyears.Repeatability: 0.1%.Marking: Provide a stamped tag showingnormal, maximum and minimum flows,pipe size, serial number and related data.

Flow meters

Cm binKiu: cm bin ng pitot tn tht nh,vi hai van ng m l u ni ving p sut.Vt liu: thp khng rLp t: tun theo y khuyn coca nh sn xut vlp t, u ni vlp van. Cung cp theo yu cu ca nhsn xut on ng thng thngngun v hngun ca l g lp. Lpvo ng bng ng lt adapter v u

hn.chnh xc: 5% khong lu lngnc oTnh n nh: trong khong 0.125%trn 5 nmTnh lp li: 0.1%.Ghi nhn: cung cp nhn tn, lu lngln nht v nhnht, sse-ri v thongtin lin quan.

ng hlu lngTng qut: ng hchia thng nht


16/24

MECHANICAL PIPING



General: Graduated meters incorporatingvariable pulsation dampening control,integral equalising valve, 2 bleed valves,and a direct reading scale linear to flowrate. Provide nylon connecting hosessuitable for a pressure of 1030 kPa.Function: To read directly the flow rate

in the pipe with a scale appropriate to theexpected flow rate.

vi b phn gim xung nhp, van cnbng, 2 van x, v mt thang o trctip tuyn tnh vi lu lng. Sdngng ni nylon ph hp vi p sut n1030 kPa.Chc nng: ch ra trc tip lulng trong ng vi mt tltng ng

vi lu lng mong i.

6 INSTALLATION 6 THI CNG

6.1 INSTALLATION - GENERAL 6.1 THI CNG - PHN CHUNG

ArrangementChanges of direction: Provide longradius elbows or bends wherepracticable, and swept branchconnections. Provide elbows or shortradius bends where pipes are led up oralong walls and then through to fixtures.Do not provide mitred fittings.

BtrThay i chiu: S dng khy v ngcong bn knh ln ni kh thi, v ngnhnh cong, S dng khy hoc ngcong bn knh nhni ng lp ln hocchy dc tng v vo thit b. Khngsdng phkin vung gc.

InstallationGeneral: Install piping in straight lines atuniform grades with no sags. Arrange toprevent air locks. Provide sufficientunions, flanges and isolating valves toallow removal of piping and fittings formaintenance or replacement of plant.Arrangement: Arrange and supportpiping so that it remains free fromvibrations whilst permitting necessarymovements. Minimise the number ofjoints.Spacing: Provide at least 25mm clearbetween pipes and between pipes and

building elements, additional toinsulation.Dissimilar metals: Join dissimilar metalswith fittings of electrolyticallycompatible material.

Lp tTng qut: lp t ng trn ngthng c dc ng nht m khng bvng. B tr trnh s nht gi. Cungcp racco, mt bch v van cch lycho php tho ng v iu chnh botr hoc thay thmy mc.Btr: btr v chng ng khngbrung ng trong khi vn cho php dichuyn cn thit. S mi ni l tithiu.Khong cch: cung cp khong trng tnht 25mm gia cc ng hay gia ngv ta nh, cng vi scch nhit.

Kim loi khng ng nht: ni cc kimloi khng ng nht bng vt liutng thch in phn.

Embedded pipingExpansion and contraction: Sheath orsleeve metal piping chased into masonryor encased in concrete so that expansionor contraction can take place withoutdamage to the pipe or to the material orsurface finish of the surroundingelement.

ng mSgin nv s co li: bc ng hocng bc ngoi bng kim loi chn vova hhay cho vo btng sginnhoc co li c thxy ra m khngnh hng n ng hoc vt liu hocb mt hon thin ca cu to xungquanh.

6.2 ACCESSIBILITY 6.2 TNH TIP CNC

GeneralProvide access and clearance at fittingswhich require maintenance or servicing,including control valves and jointsintended to permit pipe removal.Arrange piping so that it does notinterfere with the removal or servicing ofassociated equipment or valves or blockaccess or ventilation openings.

Tng qutCung cp li vo v khong trng ticc my cn duy tr v bo dng, baogm van iu chnh v mi ni cdng cho php tho ng.Btr ng khng cn trstho riv bo dng cc thit bv van c linquan hoc stip cn ckhi hoc cclthng gi.


17/24

MECHANICAL PIPING



GaugesLocate thermometers, pressure gaugesand similar instruments so that they areeasily read after installation.

ng hnh v nhit k, p k v cc kh ctng tsao cho dc sau khi lp t.

6.3 CLEANING 6.3 VSINH

External preparationRemove scale, rust, and grease andensure that surfaces are clean and dry.Protection: During construction, preventthe entry of foreign matter into thepiping system by temporarily sealing theopen ends of pipes and valves withpurpose-made covers of pressed steel orrigid plastic.

Chun bbmtCo r, cu v du mv m bo rngbmt sch v kh.Bo v: trong qu trnh thi cng, ngncc vt bn ngoi vo h thng ngbng cch lm kn tm thi pha bngca cc ng v van vi np ph bngthp dp hoc cht do cng.

6.4 SUPPORTS 6.4 CHI TIT TREO

Support systemsGeneral: Provide proprietary supportsystems of metallic-coated steel

construction.Vertical pipes: Provide anchors andguides to maintain long pipes in position,and supports to balance the mass of thepipe and its contents.Saddles: Do not provide saddle typesupports for pipes DN25.Dissimilar metals: If pipe and supportmaterials are dissimilar, provideindustrial grade electrically non-conductive material securely bonded tothe pipe to separate them. Providefixings of electrolytically compatiblematerial.

Uninsulated pipes: Clamp pipingsupports directly to pipes.Insulated pipes:- Spacers: Provide spacers at least as

thick as the insulation between pipingsupports and pipes. Extend either sideof the support by at least 20mm.

- Spacer material: Rigid insulationmaterial of sufficient strength tosupport the piping and suitable for thetemperature application.

- Vapour barriers: For cold pipes applyaluminium foil tape over thecircumference of the spacer to form avapour barrier.

- Metal sheathing: Provide a 0.55mmthick zinc-coated steel band betweenthe aluminium foil tape and thesupport for the full width of thespacer.

Hthng treo Tng qut: cung cp cc h thng treo c thi cng bng thp m kim

loi.ng ng: cung cp cc mu neo vthanh dn gi cc ng di ng vtr, v gip cn bng khi lng ng vcht bn trong.Mc ch u: Khng s dng cho ngDN 25.Kim loi khng ng nht: nu ng vvt liu treo khng ng nht, sdng vt liu khng dn in tiuchun cng nghip dn cht vo ng cch ly chng. S dng cc ph kinlm bng vt liu tng thch inphn.

ng khng bc cch nhit: bt chi tittreo trc tip ln ng.ng cch nhit:- Ming m: Sdng ming m dy

bng lp cch nhit gia gi vng. Ko di ra hai bn gi tithiu 20mm.

- Vt liu ming m: vt liu cchnhit cng vng ng vtng thch vi nhit sdng.

- Lp ngn m: i vi ng lnh. Sdng bng keo mng nhm dn xungquanh ming m to lp ngn

m.- Bc kim loi: s dng di thp mkm dy 0,55mm gia lp bng keonhm v gi ht chiu rng mingm.

Hanger size table Bng kch thc thanh treo


18/24

MECHANICAL PIPING



Minimum hanger diameter / ng knh ti thiu (mm)Outside diameter of pipe orsheathing /ng knh noing hoc lp kim loi (mm)

Light series / Ti nh Heavy series / Ti nng


19/24

MECHANICAL PIPING



Pipe Diameter / ng knh ng Gradient / dc

100 mm 1 in 20 to / n 1 in 60

150 mm 1 in 30 to / n 1 in 90

225 mm 1 in 40 to / n 1 in 150

300 mm and above / v ln hn 1 in 150 to / n 1 in 250

6.5 FLEXIBILITY 6.5 TNHN HI

GeneralProvide pipe anchors offsets orexpansion devices and pipe guides whichaccommodate expansion and contraction,and minimise the transmission ofvibration and noise to buildingstructures. Locate anchors and guides atequal distances on each side ofexpansion devices. Weld or securelyclamp anchors to bare pipe. If limitationsin the strength of structures preclude theuse of expansion devices and anchors,arrange piping to move in lateral andlinear directions (e.g. at bends) while notdeviating from gradients.

Tng qutS dng khy neo ng hoc chi titgin n v dn hng ng m c thiu tit sgin nhay co rt, v gimthiu s truyn rung ng v ting nvo kt cu to nh. nh vchi tit neov dn hng nhng chi tit chu ginn. Hn hoc kp cht neo ng vo ngtrn. nu c gii hn khnng chu lcca kt cu, khng sdng chi tit ginn v neo ng, b tr ng ng dchchuyn nghing v tuyn tnh (ngha lchcong) trong khi khng c lmsai lch dc.

PipeworkSize of Service (mm)

ngKch thc (mm)

Material Location 15 20 25 32 42 54 65 76 100 150 > 200

Vt liu Vtr

Cast iron Vertical 1.8 1.8 1.8 2.4 2.7 2.7 2.7

Gang Phng ng

Horizontal 1.8 1.8 1.8 2.4 2.7 2.7 2.7

Phng ngang

(meter)

Grey Iron Vertical 1.8 1.8 1.8 1.8 1.8 1.8 1.8

Thp en Phng ng

Horizontal 1.5 1.5 1.5 1.8 1.8 1.8 1.8

Phng ngang

(meter)

Mild Steel Vertical 2.4 3.0 3.0 3.0 3.6 3.6 4.5 4.5 4.5 5.5 5.5

Thp Phng ng

mm Horizontal 2.0 2.4 2.4 2.7 3.0 3.0 3.0 3.6 4.0 4.5 5.0Phng ngang

(meter)

Copper Vertical 1.5 1.5 2.0 2.5 2.5 3.0 3.0 3.6 4.0 4.5 5.0

ng Phng ng

Horizontal 1.5 1.5 2.0 2.5 2.5 3.0 3.0 3.6 4.0 4.5 5.0

Phng ngang

(meter)

U-PVC Vertical 1.2 1.2 1.2 1.2 1.2 1.2 1.8 1.8 1.8 1.8

Phng ng

Horizontal 0.5 0.5 0.6 0.6 0.6 0.6 0.6 0.9 1.2 1.2

Phng ngang

(meter)


20/24

MECHANICAL PIPING



Flexible connectionsMinimise the transmission of vibrationand noise through the piping. Provideflexible connections between piping andvibrating sources.Connections to major plant items:Reinforced rubber type, spherical shape

with flanged ends.Elsewhere: Flexible reinforced nylonhose.

Ni ng mmGim thiu s truyn rung ng vting n sang ng. S dng ni mmgia ng ng v ngun rung ng.u ni vi cc thit bchnh yu: loicao su c gia c, dng hnh cu vi mtbch.

Ni khc: ng nylon mm gia c.

6.6 SLEEVES 6.6 LXUYN

GeneralLocation: Provide sleeves with adequateallowance for normal pipe movementthrough all walls, floor slabs, andbuilding elements.

Cover platesGeneral: Where exposed to view providecover plates fixed to the pipe or

insulation sheathing and free to movewith respect to sleeve and buildingsurface.Material: Non-ferrous metal, finished tomatch the pipe, or of stainless steel,close fitting and firmly fixed in place.

Tng qutVtr: cung cp lxuyn thch hp chophp i ng xuyn qua tng, sn, vcc chi tit ca ta nh.

Tm cheTng qut: cung cp tm che nhngni c th thy c ng hoc cchnhit bn ngoi v d dng di chuyn

ti lxuyn v bmt ta nhVt liu: kim loi mu hon thin phhp vi ng, hoc ph kin bng thpkhng rv cnh mt ch.

Cover plate sizes table/ Bng kch thc tm che

Nominal pipe size, DN

ng knh ng

Cover plate diameter

ng knh tm che

< 20 65 mm

20, < 50 100 mm

50 50 mm larger than pipe

6.7 JOINTS 6.7 NI NG

GeneralMinimise the number of joints. Ifpracticable, provide welded or brazedjoints or a proprietary pipe couplingsystem.

Tng qutGim thiu s lng chni. Nu khthi, sdng mi ni hn thp hoc thauhoc hthng khp ni nguyn bmuasn.

Demountable jointsGeneral: Provide demountable joints asfollows:- At connections to mechanically

cleanable heat transfer vessels andpumps.

- At maintenance locations.Pipes > DN50: Flanged type.

Mi ni tho lpTng qut: S dng mi ni tho lpnhsau:- ch ni vi bnh cha v bm

chuyn i nhit c th v sinh chc.

- cc vtr bo tr.ng > DN 50: loi c mt bch.

Flanged jointsMetal flanges: Full face flanges withundistorted machined joint faces, to AS2129.Minimum flange thickness: 12mm.Bolting: To AS 2129 Appendix C and

Mi ni mt bchMt bch kim loi: mt bch c bmtni gia cng bng my khng b vn,theo tiu chun AS 2129.Chiu dy mt bch ti thiu: 12mm.Bulon: theo tiu chun AS 2129 Ph


21/24

MECHANICAL PIPING



AS 2528.- Material:

. Non-corrosive environments: Zinc-plated steel.

. Corrosive environments: Materialwith equivalent corrosion resistanceto, and compatible with, the flanges.

Flange jointing material: Preformedproprietary type at least 0.8mm thick.Installation: Install flanges square withthe run of pipe and aligned parallel toeach other. Do not correct misalignmentby bolting.

lc C v AS 2528- Vt liu:

. Mi trng khng n mn: thpmkm.

. Mi trng n mn: vt liu c chng n mn tng ng vtng thch vi mt bch.

Vt liu m mt bch: kiu to hnhtrc nguyn bmua sn dy ti thiu0,8mm.Lp t: Lp t mt bch vung gcvi ng v thng tm song song nhau.Khng hiu chnh lch tm bngbulon.

Screwed jointsTo AS 1722.1. Do not providelongscrews or barrel nipples. Sealthreads of screwed connections withdegreased PTFE tape or a thread sealingcompound.

Mi ni renTheo tiu chun AS 1722.1. Khong sdng ren di hoc tang ni. Lm knren ca mi ni ran bng bng PTFEkhmhoc hp cht lm kn ren.

6.8 DRAINS, VENTS ANDGRADING

6.8 NG THOT, NG THNGHI VDC

DrainsWater systems: Provide valved drains tothe bottom of riser piping and asnecessary to drain liquids completelyfrom piping.Other drains: Provide drains to driptrays, automatic air vents and equipmentwith drain points.Drain size: Minimum DN20. Matchequipment drain size if larger.

Drain points: Pipe drains to dischargepoints via air breaks.Air inlet vents: Provide at high points inthe system.

ng thotHthng nc: Lp t hthng thotnc c van y ng ng v ni cnthit x cht lng hon ton khing ng.H thng thot khc: Lp t h thngng thot cho mng hng, van xkh tng v cc thit bc lthot.Kch thc: ti thiu DN20. Bng vikch thc l thot ca thit b nu lny ln hn.

im thot: ng thot dn n im xhkh.Lthng hi: lp t nhng im caonht ca hthng.

Drain size table Bng kch thc ng thotNominal size of pipe to be drained, DN Nominal size of drain and valve, DN

(minimum)

Kch thc danh nh ca ng c xDN Kch thc danh nh ti thiu ca ngthot v van DN

> 50, 100 20

> 100, 150 25

> 150, 300 32

> 300 50

Air release ventsMaterial: Copper pipe.Location: Provide 15mm minimum sizeair vents at the following locations:- High points of the system.- Sections of the piping in which air

may collect.- Upstream from each item of

Van xkhVt liu: ng ngV tr; Lp t van x kh ti thiu15mm cc vtr sau:- nhng im cao nht ca hthng.- nhng on ng c thtch ly kh.-phn thng ngun ca mi thit b.


22/24

MECHANICAL PIPING



equipment.Risers: Provide a 150mm high riser setvertically from the pipe. Connect the airvent to the top of the riser.- Diameter: Pipe diameter.Water systems: Provide manual airvents.

ng ng: lp t ng ng cao150mm ni vi ng ng. u nivan xkh vo nh ng ng.- ng knh: bng ng knh ng.H thng ng nc: lp t van xkhtay.

GradingWater systems: Grade to rise in thedirection of flow to points of air venting,except, if the water piping is exposed ina run with other services, run the waterpiping to the same grade as the otherservices.Pipe gradient for all horizontal internalsanitary piping shall be as shown on thedrawings or otherwise as indicatedbelow:

dcHthng ng nc: dc cao theo chiudng chy n im xkh, trkhi, nuh thng ng nc chy ni cng vicc h thng khc, th c cng dcvi cc hthng khc. dc cho tt c cc ng ng vsinh bn trong theo phng ngang theonh yu cu trn bn v hoc nukhng c th theo bng sau y:

Pipe Diameter / ng knh ng Gradient / dc

32 mm to / n 80 mm 1: 40

100 mm 1: 60

150 mm 1: 80

200 and above / v ln hn 1: 100

All vent pipes shall have a minimumgradient of 1: 100.

T

t ccc ng thng hi phi c dcti thiu 1: 100

6.9 UNDERGROUND METALPIPING

6.9 NG NG KIM LOI TNGM

Proximity to other servicesSeparate underground piping fromelectrical cables and gas pipes, by at

least 600mm.

Khong cch n cc hthng khcTch ring ng ng t ngm ra khidy cp in v ng ng gas, ti

thiu cch xa 600mm.BeddingSurround pipes and fittings with at least75mm of compacted sand or pre-gradedsoil, with no hard edged material incontact with pipes and fittings.

Vt liu ltLt xung quanh ng v ph kin tithiu 75mm ct m cht hoc t phnloi trc, khng c cc mnh cnhcng tip xc vi ng v phkin.

Minimum cover to top of pipesIn private property:- Subject to vehicular loading: 300mm.- Under buildings or concrete slabs:

75mm.- Other locations: 225mm.

Chiu su phti thiu ca ngTrong cc khu vc nh:- Chu ti trng xe: 300mm- Bn di to nh hoc sn bton:

75mm-Nhng vtr khc: 225mm

7 COMPLETION 7 HON TT

7.1 COMPLETION TESTS 7.1 THNGHIM HON TT

Hydrostatic testingPreparation for testing: Isolate items ofequipment not designed to withstand testpressures. . Leave pipe joints exposed toenable observation during tests. Securepipes and fittings in position to preventmovement during tests. Restrain

Thnghim thutnhChun bthnghim: Cch ly cc thitbkhng c thit kchu c psut thnghim. Sit cht ng v phkin ngn nga dch chuyn trongqu trnh th nghim. Chu c ccng gin n.


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MECHANICAL PIPING



expansion bellows.Water pre-treatment: For steel piping,introduce corrosion inhibiting chemicals.Obtain chemicals from a water treatmentspecialist, and use in accordance with thespecialists instructions, under thespecialists supervision. Leave pre-

treated water in the system until thesystem is ready for chemical cleaningand flushing.Procedure: Test completed pipingsystems including equipment designed towithstand test pressures. Isolateequipment not designed to withstand thetest pressure.Test criteria: No loss of pressure over thetest period after taking account ofchanges in ambient temperature.Test pressures:- Pressure piping: To AS 4041.Other piping: Test systems at 1.5 times

the working pressure or 1 MPa,whichever is the greater, for at least 24hours.

X l nc trc: i vi tuyn ngthp, s dng ho cht chng n mn.Mua ho cht ca cc cng ty chuynvxl nc, sdng theo hng dnca h, v di s gim st ca h.Ngm h thng bng nc x l nycho n khi hthng sn sng cho victy ra ho cht v xc ra.Th tc: th nghim h thng ng thi cng hon tt c cc cc thit bc thit kchu c p sut thnghim.

Tiu chun th nghim: khng st ptrong qu trnh thnghim c tnh nsthay i nhit .

p sut thnghim: theo AS 4041

Nhng tuyn ng khc: thnghim hthng 1.5 ln p sut lm vic hoc1MPa, tu theo gi tr no ln hn,trong vng 24 gi.


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MECHANICAL PIPING



8 SELECTIONS 8 BNG LA CHN

8.1 PIPING SCHEDULE 8.1 BNG K NG

Service

HTHNG

Material

VT LIU

AS 4041 Class

Chilled water pipeworkng nc ti lnh

Black steel for closedsystemsThp en cho hthng kn

Class 3

Condenser water pipeworkNc lnh dn ngng

Galvanised steel foraerated systemsThp trng km cho hthng h

Class 3

Liquid FuelsDu diesel

Steel for closed systemsThp cho hthng kn

Class 3

Hydrant & hosereel including pump suction,plantroom piping, and pipingin common with sprinklersystem, and drain pipe.ng hng cha chy v cunng cha chy, bao gm cng ht my bm, ngng trong phng my, ngng chung cho hu phuntng

Galvanised steel foraerated systemsThp trng km cho hthng h

Class 3

Sprinkler from supervisorygate valveu phun tng tsau vangim st

Black steel for closedsystemsThp en cho hthng kn

Class 3

b.29 mechanical piping - vn - centrepoint

Documents

ng thng

kchthc ng ng p ng c

mechanical piping vn

mechanical piping insulation

tt cng ng cn thit

ng thot nc

mechanical commissioning

mechanical controls