BIỆN PHÁP THI CÔNG ỐNG CẤP THOÁT NƯỚC

HCMC Metro Cp-2 Project
Me thod Sta tem e nt fo r
TITLE : Plum bi ng & Sa nita r y
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Ho Chi Minh City Urban Railway Construction Project
PROJECT TITLE:

Ben Thanh - Suoi Tien Section (Line 1)
Construction Package 2 : Civil(Elevated & Depot)

Manufacturing QualityPlan

REVISION STATUS
REV. No.

DATE

DESCRIPTION

0

______ 2012

FIRST ISSUE

PREPARED BY
NAME
SIGNATURE
DATE

GS Neotek Vietnam

CHECKED BY

REMARKS

APPROVED BY


HCMC Metro Cp-2 Project
Me thod Sta tem e nt fo r
TITLE : Plum bi ng & Sa nita r y
Pipi ng wor k s

TABLEOF CONTENTS

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Pageno.

1

Aim...........................................................................................................................................2

2

Scopeof Works......................................................................................................................2

3

QualityControl........................................................................................................................2

3.1

Purpose/Scope..................................................................................................................2

3.2

Referencesand Standard...................................................................................................2

3.3

ProcessFlowChartfortheWorkPlanProcedure...........................................................3

4

Procedure...............................................................................................................................4

5

MaterialControl.....................................................................................................................4

6

Methodology..........................................................................................................................5

6.1

PPR PipesandFittingsInstallation..................................................................................5

6.2

uPVCPipesandFittingsInstallation...............................................................................16

6.3

HDPE PipesandFittingsInstallation...............................................................................23

6.4

UndergroundPipesInstallation.......................................................................................24

7

MachineryandTools............................................................................................................25

7.1

Machineryandtoolsforconstruction..............................................................................25

7.2

Machineryandtoolsfortesting........................................................................................25

8

TestMethodandTestPlan,TestRecordForms,InspectionForms.................................26

8.1

TestMethod........................................................................................................................26

8.2

InspectionandTestPlan...................................................................................................27

9

SafetyPlan............................................................................................................................27

10

Appendix................................................................................................................................28

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1. Aim
TheobjectiveistodescribetheinstallationofPlumbingWorksassociatedwithinstallationof
internalpipestoensurecompliancewithcontractrequirements, approvedshopdrawing, combine
andcoordinatedallservicesandstructuralpenetration shopdrawings, material,
specificationandqualitycontrol.
2. ScopeofWorks
ThisMethodStatement describestheworkexecutionfortheinstallation ofpipeforPlumbing
andSanitarysystempipingworks.
3. QualityControl
3.1. Purpose/Scope
ThisprocedureestablishestheinstructionsforthepreparationandcontrolofInspectionand
TestPlan(ITP)forfieldconstruction activitiesandnotificationtoOwner’sproject
managementfortheirselectedinspectionpointin atimelymanner.
3.2. ReferencesandStandard
Materials
uPVCpipeforSoil,Waste,VentandDrainSystem
PPRpipeforColdandHotWaterPipeSystem
HDPE pipe for external cold water pipe system only

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Standard

SS213&SS272
DIN8077/8078


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3.3. ProcessFlowChartfortheWorkPlanProcedure
1. Materials
2. ShopDrawing
3.MethodStatement

Rejected

Engineer's/Consultant’sComments
Approved

Materialsprocurement &delivery to site.
Rejected

Inspection
Approved

Installationofpipeopening through
slab&walls
Rejected

Rejected

Inspection
Approved

Rejected

1. Hangers / Supports Installation
2. Pipeinstallationbasedonapproved
shopdrawings
Inspection
Approved

1. Hydraulic Test–Cold&HotWater Piping
2. Water Leak Test–Soil,Waste, Vent &Drainagepipe
Rejected

Inspection
Approved

Rejected

1. Pipeinsulation(whereapplicable)
2. Pipe penetrationseals
3. Firestopping(whereapplicable)

4. Pipesystemcleaning&flushing
Inspection
1. Installationofequipment
2. F
inalconnectiontoequipme
nt, valves
andaccessories

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4. Procedure
4.1. Forsiteinspection,Main-conEngineer shallpreparethe Request forInspectionandnotifytothe
Engineernotlessthanoneworkingdayinadvancefor requiredholdandwitnesspoint.
4.2. ITPshallbepreparedbyresponsibleMain-conEngineeraccordingtoconstruction detail
scheduleonthebasisoftheapplicable shopdrawings, methodstatementand/or specification.
4.3. Main-conEngineershallfollowuptheinspectionactivitiesinaccordancewiththe“ITP”.

4.4. Uponcompletionoftheworkoperation,theresponsibleMain-conEngineershallreviewitem
coveredbytheapplicableITPtoassurethattheworkhas been completedsatisfactorilyand
thattheITPandallsupplementary documentationisattachedandsubmittedtothe Engineer.
4.5. Main-conshallrequesttheEngineerforvisualcheckon site,towitnesshowthePPR,uPVC
andC.I.pipearecut,heatedandcooled,joinedtogether.
5. MaterialControl
5.1. PURPOSE
Thispurposeistoprovideinstruction forthecontrolandreceiptofmaterial,equipmentand
suppliespurchased,furnishedorcontrolledbyMain-confor HCM Metro CP-2 – Line 1Project.
5.2. SCOPE
Thisprocedureisapplicabletoreceiving,handling,storage, maintenanceandinspectionof
itemsreceivedbyMain-confortheconstructionof HCM Metro CP-2 – Line 1 Project.
5.3. RESPONSIBILITY
a) Main-conengineershallberesponsiblefortheimplementation ofreceivinginspectionand
notifyingOwner’sProjectEngineer(1 dayin advance)
materialdeliveryITPformsforthematerialsw/c Main-conpurchasedinthe localmarket;and
foroverseas,thearrivalofmaterialshallbeadvisedtoClient/Project Engineeronthe
shipmentdateandETAinHCM.Main-conEngineershallnotifytheClient/Project Engineer
uponarrival inHCMoneday inadvance forreceivinginspectiontosite. The
Client/ProjectEngineershalldesignatethelaydownareasforthebulkmaterials.
b) TheSubcontractorshallplaceitemsinthestorageareasto whichtheyareassigned.
c) TheSubcontractorshallrecordeachitemonthematerialstockinventoryreportand
shallbesubmittedto Main-conformonitoring.
5.4. GENERAL
a) MaterialControl&Receivingshallconsistprimarilyofcommercial receiptincluding
count,conditionand identification.
b) Receivingshallbe performedinconjunctionwithinspectionbyMain-conEngineer.
c) Receiving inspection shall be performed based on the requirement of the latest
approvedmaterialsandprocurementdocuments.

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5.5. RECEIVING
ReceivinginspectionshallbeperformedbytheMain-conengineerandClient/ProjectEngineer
formaterialandequipmentreceived
STORAGE
a) StorageArea
1. Access to storage areas shall be controlled and limited only to authorized personnel.
2. Cleanlinessandgoodhousekeepingpracticesshallbeenforcedatalltimesinthe
storageareas
3. Main-conengineershallperformtheperiodicinspectionforstorageareaeveryweek.
5.6. MARKING
The subcontractor shall ensure that material delivered to site areneatly arranged,packed and
labeledasperitem againstthepackinglistorreceiptfrom themanufacturer.
5.7. METHODS
a) Allitemsshallbestoredinsuchamannerastopermitreadyaccessforinspection and
maintenancewithoutexcessivehandlinginordertominimizerisk ordamage.
b) Itemsstackedforstorageshallbearrangedsothattheracks,cribbingorcratesare

bearingthefull weightwithoutdistortionof the item.
6. Methodology
6.1. PPRPipesandFittingsInstallation
a) AdhesiveBondingJointFor PP-RPipesandFittings
1) Cuttingofthepipe
- Markpipeaccordingtothenecessarylength.
- Cutthepipefollowingthemarking.Cutthepipeatrightanglesto thepipeaxis.
- Forbiggerpipesusecuttingmachineasshownbelow

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2) Heatingofpipeandfitting
- Pushtheendof thepipeupto theweldingdepthintotheweldingtool.
- Afterthestipulatedheatingtimes,quicklyremovepipe andfittingfromthewelding
tool(Seetable1)
- JointhemimmediatelyuntilthemarkedweldingdepthiscoveredbythePP-R beadfrom
thefitting.
- Beforestartingthefusion,checkifthealuminum-PP-compositelayerhasbeen

completelyremove.
- All used devices and tools must have reached the necessary operating
temperatureof 260deg.C.
- Suitablemeasuringinstrumenthavetomeasureatemperatureofupto350deg.
C

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2) Weldinsaddles
- Weldinsaddlesareavailable forpipeouterdiameter of40,50,63,75,90,
110,125,160,200and250mm.Themaximum sensorwell diameter is
specifiedinthefollowingTable.2
- Weldinsaddlesareusedfor:
i. Branchconnectionsin existinginstallations.
ii. Thesubstitutionof atee.Branchconnectionsinrisers.
iii. Sensorwells,etc.

- Drillthroughthepipewallatthe intendedoutletpointbyusingthedrill.
- Inserttheheatingtoolontheconcave sideoftheweld-in saddletoolintothe
holedrilledin thepipe wall untilthetool iscompletelyin contactwith theouter wallof
thepipe.
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- Fusingtheweld-in saddlewiththepipetheoutersurface andthepipeinner
wallconnectionreacheshigheststability.
- Theweldingdevice/saddle weldingtoolmusthavereachedtherequired
operatingtemperatureof 260deg.C
- TheWeldingsurfaceshavetobecleananddry.
- Inserttheheating toolontheconcave sideoftheweld-in saddletoolintothe
holedrilledin thepipe wall untilthetool iscompletelyin contactwith theouter
wallofthepipe.Nexttheweld-in saddletoolisinserted intotheheating
sleeveuntilthesaddle surface isupagainst theconvexsideofthewelding
tool.Theheatingtimeof theelementsis generally30 sec.
- Inserttheweld-insaddlein to theheateddrilledhole.Pressedandwaitfor15
sec.Waitfor10minutestocoolbeforeexposedtofullloading.

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HCMC Metro Cp-2 Project
Me thod Sta tem e nt fo r
TITLE : Plum bi ng & Sa nita r y
Pipi ng wor k s

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4) ButtWelding
Pipesandfittingsarefused,asexplainedbelowbybuttwelding(pipedimension
160,200,and250mm)
- Cutpipeintorequiredlength.
- Plasticpipesarealignedandfixedbymeansof theclampingelements.
- Pushthepipesontotheheatingplacewithadefinedadjustingpressure.
- Whenheatingtimehasexpired,dividethemachineslide,removeheatingelement
quicklyandjointthepipes(byputtingbothpartsof theslidetogether).
- Weldedconnectioncanbe unclampedandweldingprocessis finished.

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5) Repair
- Damagedpipesmayberepairedbymeansof fusion.
- Inadditionto thistheoffersthepossibilityof thepiperepairstick.
- Theinstallation:samestepfor weld-insaddle.

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HCMC Metro Cp-2 Project
TITLE :

c) Exposedpipes

PipeHangershall
have neoprene
pad.

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PPR– PipeSupportDetailsand Schedule

2) ConcealedPP-Rpipes
- Mark locationof pipesandoutleton wallsaccordingto approvedshopdrawings.
- Afterlayouthasbeenestablished,markthepiperouteonthebrickwallwithtwo
markedlinesaccordingtoinstalledpipesize(followTable3).

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Note:Seeshop drawing
detailsfor variouspipe outlet
heightsasper san.fixtures
supplierrecommendation.

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6.2. uPVCPipesandFittingsInstallation
a) Cuttingof pipe
- Allcuttingmustbedoneinwarehouseorindesignatedareasateachfloor.All
cuttingmustnotbe doneat workarea.
- Cuttinganglemustberightangle.
- Insideedgesmustbereamedsmoothbyreamerorsandpaper.
b) AdhesiveBondingW ork(foruPVCPipe)
Zeropoint
Stopper

Swelllayer by Adhesive
(0.1-0.2mm)

Marking

PVCsocket

Ｌ

Ｌ

PVCPipe

PVCsocket

PVCPipe

DeformationsRegion

Marking

Fluidityregion

BoundaryofJoint
ActualPVCSocketLength

12

BoundaryofJoint

Figure1:DetailsofAdhesiveBondingJoint

- Ensurepipesarecorrectdiameter,approvalmaterialpriortostartworks.Plainends shall
be inspected with special attention, as these ends
arethemostsusceptibletodamage.

- Pipesshallnotberolledorskiddedagainstotherpipematerials.Make
surethatthepipesarefreefrom debrisandotherforeignmaterials.
- Markthemeasuredlengthonthepipe bypermanentmarkerpen.
CutthepipeusingapowersaworaPVCcutter.Besureto cutthepipe squarely.

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- Chamferthe
cornersandremoveallburrsbyreamer,fileorsandpaper,cleanawaydust,dirtandoils
withacleanrugbeforeapplyingadhesive.

- Beforejointing,insertthepipeintothejointsocketandconfirmthatthelengthfrom
zeropointtotheendof pipeis 1/3to 2/3of actualsocketlength.

- Attachmarkingon thepipesurfacebypermanentmarkerpen.
Markingpositionshallbeactualsocketlengthfrom theendof pipe.
- Applyadhesiveuniformlyandthinlywiththebrushforoutsideofpipeandinsideof
socketandinsert.Don'ttwistafter
i
nserting,butinsertstrongly,andpressitdownasitis.Standardcontroltimesis30secondsfordi
ametersof50mmorless, take60secondsfordiameterofmorethan50

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- I
mmediatelyinsertpipeintofittingsocket,givingthepipeaonequarterturnandmakingsureitgo
esallthewaytothesocketbottom.

-Holdthejointtogetheruntilatightsetis attained

- Standardcontroltimesis30secondsfordiametersof50mmorless,take
60secondsfordiameterofmorethan50mm.

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