pipeline activity.pdf

7/21/2019 Pipeline Activity.pdf

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PIPELINE ACTIVITIES

BY

TIRUPATI,INDIA


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pe ne :pe ne :

TransportationTransportation ofof liquidsliquids andand gasesgases fromfrom oneone

..


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Survey

Pipe line activity :

Unloading & stocking of pipes at site

Marking

Trench excavation

Blasting

contd


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Sand bedding

pe ower ng

Laying, joining

Back filling

Sand encasing

pec a s x ng

contd


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Pedestals, thrust blocks & valve chambers

Hydro testing

Commissioning

Final measurement

Reconciliation


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TYPE OF PIPES


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Mild steel (MS)

ass re n orcemen p as c

Ductile iron DI

Cast iron (CI)

High density poly ethylene (HDPE)

Poly vinyl chloride (PVC)


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Pre stressed concrete (PSC)

Reinforcement cement concrete (RCC)

Bar wra ed steel c linder (BWSC)

Galvanized iron (GI)

Low alloy pipe (LA)


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PVC pipe MS pipe GI pipe


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p pe p pe p pe


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TRENCH EXCAVATION


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Obtain work permit before starting excavation work.

Marking is to be made

Excavate trench up to required level with free working

slopes for stability.

1:1 clay, muram & boulders etc1:2 hard muram

NOTE: Slope not requiredfor soft & hard rock


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TRANSPORTATIONRANSPORTATION

OF

MATERIAL TO SITE


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Pipes shall be transported to the site of laying and stacked

avoid damage to the coating

Suitable gap during pipe stacking should be left at proper

intervals to permit access from one side to the other


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Each pipe & special should be properly stacked at

cause any damage to their outer coating.


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PIPE HANDLING


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manual pipe handling :

e ore an ng t e p pe,

work men should wear

1. Ro es used to lift the material must be in ood condition

and it should not be let over sharp edges

2. Ensure that the persons are moved away from the pit while

placing the pipe (if it is heavy)

3. while handling materials in the wet season, ensure that the

materials are free from slush as it may cause slipping.


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Pipe handling by machinery

Slings should be in good condition and free from defects,

Ensure proper clamping of slings, these are provided on

same direction on free len th

Ensure ro er visibilit for the crane.


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C.I D.I PIPES

LOWERING, LAYING JOINING


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Pipes should be lowered slowly in to the trench by means ofchain ulle block and tri od standor cranes or with thehelp of ropes.

socket. Spigot end shall be lubricated with good quality of

grease or oil, then the spigot shall be slipped into socket by.

S i ot ends of all i es shall face u stream irres ective of

the direction of water flow.


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GRP PIPESRP PIPES

LOWERING, LAYING

AND

JOININGOINING


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Lowering and laying :

pe s a e a n ry con t on an un er no c rcumstancesthey shall rest on sludgy bedding. Pipes shall rest continuously

on the bottom of the trench.

Clearance of approximately100mm in depth and width equal

to engt o t e co ar p us mm on ot s es s a e

provided at the joint which shall be refilled from sides after the

oint is made.

The pipe should be lowered in to the trenches either by pulley

or by means of two ropes. For road crossing or river crossingthe pipe shall laid 2.0mtr. Below the bed level. The pipe

should be encased with300mm thicksand.


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Joining :

1. Spigot and socket and socket joint with double water tight

ru er r ng gas e pac ng

2. Double socket cou lin oint with water ti ht rubber rin

gasket packing

3. Flanged joint is used for connecting the valves, the flanged

joint is made from the same materials as the pipe

4. End pipes should not kept open, the ends shall be covered up

either by suitable cap or plug or double layer of gunny bags.


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GRP joint with Spigot & socket end


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M.S PIPES

LOWERING, LAYING, JOINING

PAINTINGAINTING


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Before Laying, M.S pipes should be coated with cement or

Paintin

1. surface cleaning :

The pipe should be cleaned before painting with special

epoxy thinner. This avoids oil, Greece marks on the pipe.Due to these marks the paint wasn't sticking. Inside dust can

.

2. primary coating

After surface cleaning, firstprimer coating is necessary. Forthis purpose zinc phosphate primer is combined withactivator in 6:1 ratio. Zinc phosphate primer is component a

act vator s component , so

primer = component a + component


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3. Out side coating :

After primary coating, out side of pipe painted with

epoxy coa tarw c s com ne w t act vator n 4:1

ratio.

4. Inside :

Foo gra e epoxy used for inside painting resistscorrosion, this is the combination ofresin & cure in 1:1ratio.


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Lowering, laying and joining of MS pipes:Lowering, laying and joining of MS pipes:

Before welding the pipe faces shall be cleaned by scrapingBefore welding the pipe faces shall be cleaned by scraping

by wire brushesby wire brushes

in lining and coatingin lining and coating

e en s o p pes s a ave eve e en s or we nge en s o p pes s a ave eve e en s or we ng


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, ., .(Gap depends up on thickness) electrodes shall be conform(Gap depends up on thickness) electrodes shall be conform

to is 814to is 814--1991 i.e, e1991 i.e, e--60136013

MSMS pipespipes areare manufacturedmanufactured eithereither byby electroelectro resistanceresistanceweldinweldin or or submer edsubmer ed arcarc weldinweldin rocessrocess lon itudinalllon itudinall or or

spirallyspirally weldedwelded

. .


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What is metal arc welding :

In metal arc welding a metal rod is used as oneelectrode during the welding operation this metal electrode ismelted by the heat of the arc and is fused with the base metal.

Welding defects :1. Lack of penetration,

2. Slag inclusion,

3. Under cut,

. oor us on,

5. Porosity,

. ,

7. Spatter,

8. Wra in & distortion.


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HDPE PIPE

LAYING JOINING


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FusionFusion weldingwelding isis commonlycommonly usedused inin HDPEHDPE andand isis aa

permanentpermanent typetype ofof jointjoint

TheThe pipespipes shallshall bebe brushedbrushed throughthrough outout toto removeremove anyany soilsoildepositeddeposited oror stonestone theirtheir inin

PipesPipes shallshall bebe laidlaid inin drydry conditioncondition andand under under nono

circumstancescircumstances thethe shallshall restrest onon slushslush beddinbeddin

ClearanceClearance ofof requiredrequired depthdepth && widthwidth onon bothboth sidessides shallshall

,,

afterafter thethe jointjoint isis mademade


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ForFor roadroad crossingcrossing oror riverriver crossingcrossing thethe pipepipe shallshall bebe laidlaid 22

PipePipe afterafter transportingtransporting toto thethe exactexact placeplace shouldshould bebe cutcut squaresquare

byby thethe hacksawhacksaw bladeblade

TThehe faceface ofof thethe i ei e should should bebe sli htlsli htl scra ed scra ed rior rior toto thethefusionfusion weldingwelding toto removeremove oxidizedoxidized layerlayer

weldingwelding


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TheThe heatingheating mirrormirror // panpan shouldshould bebe heatedheated upup toto 200200 degdeg.. cc

andand thethe surfacesurface ofof thethe panpan shouldshould bebe 210210 ++ oror 55 degdeg.. CC

TheThe heatingheating panpan shouldshould bebe metallicmetallic plateplate whichwhich isis heatedheated upuptoto thethe re uiredre uired tem eraturetem erature eithereither bb electricalelectrical coilcoil embeddedembedded

insideinside oror byby blowblow torchtorch

thethe heatingheating mirrormirror // panpan withwith TeflonTeflon paperpaper onon eacheach sideside

TheThe contactcontact pressurepressure ofof 00..22 kg/cmkg/cm22 inin eithereither sideside ifif thethe pipepipeshouldshould bebe maintainedmaintained


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InitialInitial heatingheating timetime forfor achievingachieving thethe moltenmolten rim,rim, variesvaries fromfrom

11 toto 55 minmin dependingdepending onon thethe pipepipe wallwall thickthick && sizesize..

Pi esPi es shouldshould bebe removedremoved fromfrom thethe heatinheatin mirrormirror // anan whenwhen

thethe rimrim ofof thethe moltenmolten materialmaterial isis formedformed andand ensureensure thatthat thethe rimrimformationformation isis notnot excessiveexcessive..

ImmediateImmediate jointjoint shouldshould bebe mademade byby thethe applicationapplication ofof

moderatemoderate pressurepressure ofof approxapprox..11 toto 22 kg/cmkg/cm22 forfor 22 toto 33 secsec..

whilewhile joining,joining, thethe pressurepressure shouldshould bebe maintainedmaintained untiluntil thethe

ointoint isis lukeluke warmwarm..

AfterAfter thethe pressurepressure isis relieved,relieved, thethe jointjoint shouldshould bebe allowedallowed toto


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BackBack fillfill withwith excavatedexcavated soilsoil shouldshould bebe freefree fromfrom

c n ers,c n ers, as es,as es, s ag,s ag, re use,re use, ru s ,ru s , vege a evege a e or or organ corgan c

metal,metal, lumpylumpy oror frozenfrozen metal,metal, bouldersboulders rocks,rocks, otherother materialsmaterialswhichwhich inin thethe opinionopinion ofof anyany authority,authority, isis deleteriousdeleterious..

Concrete slabs over pipes :Concrete slabs over pipes :

whenwhen pipespipes areare laid laid belowbelow roadsroads (which(which maymay bebe

subjectedsubjected toto heavyheavy traffictraffic loads),loads), trenchestrenches shouldshould bebe coveredcovered

ww re n orcere n orce concre econcre e s a ss a s


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GRP Lamination Details

1. Grinding wheels, (machine)

2. Surface,

3. Robin,

4. Matt5. Resin,

6. Hardener,

. ,


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am na on rocess :

1. First rindthe dama ed ortion with rindin wheel.

2. After that , mix the aerosol powderwith hardener, this

m x ure as o e pu on amage por on, ar ener s

used to set quickly that joint.

3. Surface is very soft material, this has to put on that portion

& paste with resin which is used for sticking & hardening.


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4. Matt & robin are the strength of that lamination

process

these both used one by one on damaged portion.

5. The robin & matt used up to 7 times6. Resinpour on robin & matt


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Hydro Testing:

1. After Completion of each section of pipeline, it shall be

es e or wa er g ness e ore e ng covere n.

2. This can be done by closing each end by means of

valve, blank flange, cap or plug and filling the pipe with

water.


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3. The pressure shall be raised gradually by means of a hydro

testing pump till the pressure is at least one and half times

t e wor ng pressure.

4. A pressure to be specified by the authority for a duration of

one hour.

NOTE : In the test pressure drops after one hour


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THANK U.....

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