piping design basis (6724-700-50-43-db-0016)_rev.a

Title:PIPINGDESIGNPHILOSOPHY Doc.No.:67247005002DB0001Project:ADDITIONALBOGBOOSTERCOMPRESSORLNG

DABHOLTERMINALFORRATNAGIRIGASANDPOWERPRIVATELIMITED

ProjectNo.:6724 SheetNo.:2of56

Rev.A

INDEXSHEET

PAGENO. TITLE REVA

1 COVERSHEET 70613

2 INDEXSHEET 70613

3 REVISIONRECORDSHEET 70613

4 TABLEOFCONTENTS 70613

556 PIPINGDESIGNPHILOSOPHY 70613




Rev.A

REVISIONRECORDSHEET

REV.NO. PURPOSE LISTOFPAGESUPDATED/MODIFIEDSECTIONS,IFANY

A ISSUEDFORREVIEW




Rev.A

TABLEOFCONTENTS

1.0SCOPE........................................................................................................5 2.0DESIGNPHILOSOPHY/CRITERIAGENERAL..............................................................52.1EQUIPMENTLAYOUT.............................................................................................................52.2UNITPIPING............................................................................................................................112.3OFFSITE&YARDPIPING.....................................................................................................172.4FLAREPIPING..........................................................................................................................182.5UNDERGROUNDPIPING....................................................................................................182.6FLEXIBILITYANALYSIS&SUPPORTING.......................................................................192.7MATERIALS..............................................................................................................................232.8THERMALINSULATIONOFPIPING,EQUIPMENTANDVESSELS.......................332.9PAINTING................................................................................................................................332.10WELDING................................................................................................................................332.11MISCELLANEOUS................................................................................................................343.0REFERENCEDPUBLICATION..................................................................................................364.0ATTACHMENTS:..............................................................................................................................ANNEXUREATABLEOFBASICSPAN................................................................................37ANNEXUREBACCESSIBILITYFORVALVES&INSTRUMENTS................................39ANNEXURECVERTICALANDHORIZONTALGUIDESSPACING............................41ANNEXUREDTECHNICALREQUIREMENTSOFPIPINGMATERIAL......................42ANNEXUREECLEARANCES..................................................................................................54




Rev.A

1.0 SCOPE

ThisDesignBasisbrieflycoversthebasicrequirementsforthedesignofpipingsystemsCoveredbyASMEB31.3.TheseshallbeadheredtobyLSTKContractor(s)orhissubcontractor(s)duringthecourseofengineering,procurement&construction.

2.0DESIGNPHILOSOPHY/CRITERIA:GENERAL 2.1EQUIPMENTLAYOUT 2.1.1BASISOFEQUIPMENTLAYOUT

Equipmentlayoutshallbedevelopedbasedonthefollowingdata:

P&IDs.OverallPlotPlan.Winddirection.EquipmentDataSheets.IndicativeEquipmentLayoutfromBasicEngineering,ifany.Processpackage.

2.1.2DEVELOPMENTOFEQUIPMENTLAYOUT

Thefollowingaspectsshallbeconsideredduringdevelopmentofequipmentlayout:

ProcessRequirementi.e.properinterconnectionbetweenequipmentasperP&IDstoachievetheintendedprocessparameters.EconomyofPipingmaterialMinimizethequantityofcostlypiping.Erection&ConstructionrequirementErectionschemeandscheduleofallequipmentmustbeconsideredduringequipmentlayouttohavesmootherection,approachroadforcranes/derricketc.SafetyRequirementsAsaminimum,OISDStd.118shallbefollowed.FirefightingfacilitiesshallbeprovidedasperTAC&OISDnorms.Safetyshowerlocationshallbemarkedinequipmentlayout.FordetailedguidelinesreferGeneralCivilDesignbasisforfireprotection.Constructability,OperationandMaintenanceRequirement:




Rev.A

OverheadandsideclearancesforcompressorsandpumpsHorizontal&overheadclearancesforeasymovementofworkingpersonnelCraneapproachesforaircoolers/firedheaters.ProvisionofmonorailforpumpsProvisionofEOT/HOTcraneforcompressorsProvisionofoperatorscabin

SimilarequipmentgroupingAllcolumns,exchangers,pumpsetc.shouldbegroupedtogetherforconvenienceofmaintenanceandsafetywhereverfeasible.Thetechnologicalstructuresshouldbeinterconnectedforeasymovementofoperationalpersonnel.U/Gpipingcorridorsformainheadersshouldbemarkedinequipmentlayoutforallundergroundpiping.Allareasrequiringcraneaccessforerectionorspecificmaintenancepurposee.g.catalystloadingetc.shallbemarkedontheequipmentlayout.

2.1.3PIPERACK

Ingeneral,equipmentlayoutshallbepreparedconsideringstraightpiperack,howeverothershapeslikeL/T/U/H/Zetccanalsobeconsideredbasedonareaavailable.Thetotalwidthofpiperackshallinclude25%extraspaceforfutureexpansion/modificationsinunitforrackwidthsupto16Mand10%forrackwidthsabove16M.Thewidthoftherackshallbe6M,8Mor10Mforsinglebayand12M,16Mor20Mfordoublebayhaving4tiersmaximum.Thespacingbetweenpiperackportalsshallbetakenas6Mingeneral.Howeveritcanbeincreasedto8Mdependingonthesizeofthepumpstobehousedbelowpiperack,inwhichcaseanintermediatestructuralmembershallbeprovidedinpiperackfortier.




Rev.A

ForUnits,clearancebeneathpiperackshallbe4.0Mminimumbothinlongitudinalandtransversedirections.ForOffsites,clearancebeneathpiperackshallbe2.2Mminimumbothinlongitudinalandtransversedirections.Roadclearanceshallbe7Mminimumformainroadand5Mforsecondaryroad.Waterlinesmorethan30shallnotberoutedoverpiperack,theseshallberoutedunderground.

2.1.4TOWERSANDVERTICALVESSELS(ASAPPLICABLE)

Towersandverticalvesselsshallbearrangedinarowwithcommoncentreline,decidedbythelargestvessels,placingO.D.oftheequipmentminimum4Mawayfromthepiperack.Aminimumclearanceof3Mshallbeallowedbetweentowershells,butinanycaseplatformsofadjacenttowersshallnotoverlap(minimum100mmhorizontalgapshallbeprovidedbetweenplatformofadjacenttowers)andthataminimum900mmisleftbetweentowerplinths.Thegapbetweenverticalvesselsshallallowfullopeningofmanholecoverswithoutrestriction.Effortsshallbemadetoprovideinterconnectingplatformsatsuitablelevelsforadjacenttowersand/oradjacenttechnologicalstructures&rackwalkwaysetc.Interconnections,whereverfeasibleshallbedoneaftertakingthermalexpansionsoftowersintoconsiderationsAlllevelswitches,LGsetcincludingtheirisolationvalvesshallbeaccessiblefromladdersorplatforms.Tohandleheavyitems(likereliefvalves,blindsetc.)adavitshallbeprovided.Thedavitshallbeonthesideofthevesselawayfromthepiperack.Theareaatgradeshallbekeptclearforadropout.

2.1.5HORIZONTALVESSELS

The horizontal vessels shall be laid perpendicular to pipe rack and shall be placedminimum4Mawayfromthepiperack.Theclearancebetweenadjacenthorizontalvesselshellsshallbeminimum2Mor900mmclearaislewhicheverishigher.




Rev.A

2.1.6PUMPS(ASAPPLICABLE)

Whereverpracticablepumpsshallbearrangedinrowswiththecentrelineofthedischargenozzleonacommonstraightline.Pumpsshallbekeptoutsidethepiperackwithpumpdischargenozzlekeptatadistanceof1metrefrompiperackandmotortowardsrack.Gapbetweeneachpumpfoundation/andfoundationoftechnicalstructureshouldbesufficientforeasyremovalofequipmentafterpiping.Clearancebetweentwoadjacentpumpsshallbesuchthatclear900mmaisleisavailable.Allpumpsnotopentoskywithmotorrating>=75KWshallbeprovidedwithmonorail.Nomonorailshouldnormallybeprovidedforpumpsopentoskyandsufficientspacebelowrackshallbeavailableforpumpmaintenance.

2.1.7AIRCOOLERS(ASAPPLICABLE)

Aircoolersshallbelocatedoverthemainpiperackorontechnologicalstructure.Foraircoolerslocatedontechnologicalstructure/rack,blindfloorshallbeprovided.Blindfloorisgenerallynotrequiredifpumpshandlinghydrocarbonsorequipmentarenotplacedbelowthem.ThewidthofthestructurefromwhereAircoolerassemblyissupportedshallbeabout2.0mmorethantheAircoolertubebundlelengthsothatpropersupportingofinlet/outletpipingmanifoldscanbedonefromthemainmembersofpiperack/technologicalstructuretotransferpipingloadtomainstructuralmembers.Davitshallbeprovidedforloweringthegearboxesetc.alongwithmobiletrolleywithretractablejackingarrangementofsuitableloadcarryingcapacity.

2.1.8COMPRESSORSANDTHEIRPRIMEMOVERS(ASAPPLICABLE)

Followingtypesofcompressorsareusedinprocessplants:

a.Centrifugalcompressors

b.Reciprocatingcompressors.

c.Liquidringcompressors




Rev.A

d.Screwcompressors

e.Diaphragmcompressors

Compressors shall be located to keep suction lines as short as possible. The gascompressors shall be located downwind side of furnace so that leaks are not blowntowardsfurnace.Ingeneralcompressorsaretobelocatedundershed.Whencompressorsare locatedunder shed, sides tobekept fullyopen for the low shedorpartially closedfrom top forhighshed toavoidaccumulationofheaviergases in theshed,however, incase of hydrogen compressors located under the sheds provision for top venting fromcompressorshedsshallbeprovided.In case of a turbine driven compressor, if exhaust steam is condensed, turbine andcompressor need to be located at an elevated level and condenser tobe located belowturbine.Amajorconsiderationincentrifugalcompressorlocationisthelubeandsealoilconsole. Itmustbeaccessible froma road,mustbe lower than thecompressor toallowgravitydrainofoil to the consolesoil tank. Intercoolers&Knockoutpotsmaybekeptwithin/outsidetheCompressorhouseshed,but,shallbekeptnearcompressorhouse.ForcompressorsElectricallyOperatedTravellingCranetohandleheaviestremovablepieceshallbeprovidedforeachcompressorhouse.Maintenancebayforcompressorsshallbeprovided.Maintenancebayshallbeaccessiblefromroadtofacilitateunloading&loadingontotrucketc.Forremovalofbundlesofexchangerslocatedwithinbuildingmonorailarrangementshallbeprovided.Compressormanufacturermaybeconsultedforrecommendedlayoutandadditionalrequirementformaintenance.Licensorsrequirement,ifany,shallalsobetakenintoconsideration.

2.1.9CLEARANCEANDACCESSIBILITY

2.1.9.1CraneAccess

Equipment,structuresshallbearrangedtopermitcraneaccesstoserviceaircoolers,compressors.Dropoutbaymaybeconsideredforexchangers&coolersatelevatedstructures.




Rev.A

2.1.9.2AccesstoPumps

Clearaccessof4.0Mverticallyand3Mhorizontallyshallbeprovidedcentrallyundermainpipewaysforsmallmobileequipmenttoservicepumps/motors,wherevertheseareinstalledunderpipewayswithpriorspecificapproval.Pumpsoutsiderackshallbeapproachablebymobileequipmentsetc.fromunderthepiperack.

2.1.9.3Accesstoloweritemstograde(LoweringArea)

Clearaccessshallbeprovidedatgradeontheaccesssideforloweringexternal&internalfittings,PSVs,Controlvalvesetcfromelevatedequipment(columns,towersetc)byprovidingpipedavits.

2.1.9.4Layout&AccessRequirementsForPlatforms(LaddersAndStairs)

Forprovidingplatformladder&staircasefollowingguidelinesshallbefollowed:Twomeansofaccess(i.e.twoladdersoroneladderandonestaircase)shallbeprovidedforanyelevatedplatform,whichservesthreeormorevessels&forbatterylimitvalvesoperatingplatforms.Platforms,ladders&stairwaysshallbeconsistentwithaccess&safetyrequirements.Stairwayfortankstobeprovidedonupstreamofpredominantwinddirection.

(i)Platformatelevatedstructure

Dualaccess(i.e.onestaircaseandoneladder)shallbeprovidedatlargeelevatedstructureifanypartofplatformhasmorethan22.65M(75ft)oftravel.Aircoolersshallhaveplatformswithinterconnectedwalkwaysprovidedtoservicevalving,fanmotorsandinstruments.AccessrequirementsshallbeDualaccess(i.e.onestaircaseandoneladder).

(ii)Platformswithstairaccessshallbeprovidedonlyfor:

Locationatwhichnormalmonitoring(onceadayormore)isrequiredorwheresamplesaretaken.

Locationswherevesselsorequipmentitemshaveoperatorattentionsuchascompressorsetc.

Mainpiperackatbatterylimits




Rev.A

(iii)Platformswithladderaccessshallbeprovidedfor

Itemsthatrequireoccasionaloperatingaccessincludingvalves,spectacleblindandmotoroperatedvalves,heaterstacksamplingpoints.Manwaysabovegradeonequipment.

(iv)LadderLocation

Whereverpracticable,laddershallbesoarrangedthatusersfaceequipmentorplatformratherthanfacingopenspace.Landingsshallbestaggered.Noladdershallbemorethan6Minoneflight.

2.1.9.5CLEARANCES

MinimumclearancesshallbeasindicatedinAnnexureE.2.2UNITPIPING 2.2.1BASISOFUNITPIPING

Piping&InstrumentDiagramEquipmentlayoutEquipmentDatasheet&SettingplanLinelistInstrumentDatasheetStructural&buildingdrawingsTopographyoftheplantPipingmaterialspecificationOverallplotplan




Rev.A

Thefollowingobjectiveshallbeachievedduringpipinglayout:

Properaccesstoalloperatingpointsincludingvalvesandforallorificetappingpoints,instrumentsinparticular(referAnnexureB).Properaccesstointerrelatedoperatingpointsforspecificpurposeandformaintenance.

2.2.2PIPEWAYS/RACKPIPING

Racks shallbedesigned togive thepiping shortestpossible run and toprovideclearheadroomsovermainwalkways,secondarywalkwaysandplatforms.

Predominantlyprocesslinesaretobekeptatlowertierand,utility&hotprocesslinesonuppertier.

Generally the top tier is to be kept forElectrical cable trays (if not provided inunderground trench) and Instrument cable ducts/trays. Cable tray laying to takecareofnecessaryclearancesforthefireproofingofstructure.

Generallythehot linesandcold linesshallbekeptapart indifferentgroupsonatier.

Generallythebiggersizelinesshallbekeptnearertotherackcolumn.

MinimumspacingbetweenadjacentlinesshallbedecidedbasedonO.D.ofbiggersize flange (minimum rating 300# to be considered), O.D. of the smaller pipe,individualinsulationthicknessandadditional25mmclearance.Evenifflangeisnotappearingthemin.spacingshallbebasedonabovebasisonly.

Actual line spacing, especially at L bend and loop locations, shall take care ofthermal expansion / thermal contraction / nonexpansion of adjacent line. Nonexpansion/thermalcontractionmaystopthefreeexpansionoftheadjacentlineatLbendlocation.

Anchorsontheracksaretobeprovidedontheanchorbayiftheconceptofanchorbayisadopted.Otherwiseanchorsshallbedistributedovertwotothreeconsecutivebays.

Anchorsshallbeprovidedwithinunitonallhotlinesleavingtheunit.




Rev.A

Processlinescrossingunits(withinunitsorfromunittomainpipeway)arenormallyprovidedwithablockvalve,spectacleblindanddrainvalve.Blockvalvesaretobegroupedandlocationsofblockvalvesinverticalrunofpipearepreferred.Iftheblockvalveshavetobelocatedinanoverheadpipeway,staircaseaccesstoaplatformabovethelinesshallbeprovided.Stubsinseawatershallbefromtopofmainheader.

2.2.3VESSELPIPING/CONTROLVALVES

Pipingfromvesselshalldroporriseimmediatelyuponleavingthenozzleandrunparallelandcloseaspracticabletovessel.

Pipingshallbegroupedasfaraspossiblefortheeaseofsupportsandshallrunontheracksideofthecolumn.

Manholesshallbekeptontheroadsideoftheequipmentandshallbeapproachablefromtheplatform.Platformwidthshallbesuchthatminimum1Mspaceisavailablebeyondmanholeformovement.

Pipingshallbesupportedfromcleatsweldedonthevesselasfaraspossible.

Properguidesatrecommendedintervalsshallbeprovidedforlongverticallines.

Accessplatforms/laddersshalltobeprovidedalongthecolumnforvalvesandinstruments.Minimumclearwidthofplatformshallbe750mm.

Foreaseofoperationandmaintenance,columnandvesselswhicharegroupedtogether,shallhavetheirplatformsatthesameelevationandshouldbeInterconnectedbywalkways.Howevereachcolumn/vesselshallhaveanindependentaccessalso.

Column/vesselplatformsshouldbedesignedinsuchawaysothatallthenozzlesshouldbeapproachablefromplatforms.

Pipingatcolumns/vesselnozzlesshallbearrangedsothatblankscanbeeasilyinstalledforhydrotesting.

UnlessspecificallyindicatedinP&IDscontrolvalvesshallpreferablybekeptatgrade.




Rev.A

Pipingintendedforvacuumservicesshallberoutedasshortaspossiblewithminimumbendsandflangedjoints.Pipingsupportcleatsforsafetyvalvesshallbeindependentmeantforsafetyvalvesonly&shallbedesignedconsideringimpactloadingduringpoppingoff.UtilityConnectionnozzlesshallbefromside/top.

2.2.4PUMPPIPING

Pumpdrivesshallhaveclearaccess.

Pumpsuctionpipingshallbeasshortaspossibleandshallbearrangedtoavoidvapourpockets.

Reducersimmediatelyconnectedtothepumpsuctionshallbeeccentrictypewithflatsideuptoavoidtheaccumulationofgaspocket.

Forendsuctionpumpselbowsshallnotbedirectlyconnectedtothesuctionflange.Astraightpieceminimum3timesthelinesizeshallbeprovidedatthesuctionnozzle.

Pumpdischargecheckvalveifinstalledinverticallinesshallbefittedwithadrainconnectionascloseaspossibledownstreamofthevalve.

Unlessotherwisespecified,Ttypestrainersshallbeusedonpumpsuctionpipingforsizes2andabove.

Ytypestrainersshallbeusedforallsizesinsteamservicesandforpumpsuctionlinesbelow2.

Allsmallborepipingconnectedtopump(draintoOWS&CBD,seatandglandleakdrain)shallhavebreakupflangesforremovalofpumps.PipingshallbesoarrangedthattheforcesandmomentsimposedonthepumpnozzledonotexceeddoubletheallowablevaluesofAPI610.Pumpdischargeshouldbepreferablyroutedawayfromthepumpratherthantowardsthemotorside.Pumpcoolingwaterconnectionshallbetakenfromthetopofcirculatingcoolingwaterheader.Suction&dischargevalvesshallbelocatedatoperableheight.




Rev.A

2.2.5COMPRESSORPIPING

Suctionlinesshallbeasshortaspossible.

Suctionpipingshallhaveadequateflangedjointsforeaseoferectionandmaintenance.

Where the line between knockout drum and the compressor cannot be routedwithoutpocket,lowpointdrainshallbeprovidedtoremoveaccumulationofliquid.Thesystemshouldbeapprovedbyprocess.

Aminimumstraightlengthofsuctionpipeshallbeprovidedaspermanufacturersrecommendation.

Lube oil cooler space shallbeprovided in away so as to facilitate tube bundleremoval.

Alloperatingvalvesonmainsuctionanddischargepipingshallbe linedononesideasfaraspossible.

Pipingshallbedesignedso that forcesandmoments imposedon thecompressordonotexceedthemanufacturersrecommendation.

Lowpointsinthedischargelinefromanaircompressorshallbeavoidedbecauseit ispossible for lubeoil tobe trappedandsubsequently ignited. If lowpointsareunavoidable,theyshallbeprovidedwithdrains.

Incaseofreciprocatingcompressor,pipingshallbesuitablysupportedtoavoidvibrationsduetopulsatingflow.Unlessrequirementsofnopocketsarespecifiedbythelicensor,allthepipingshallrunat500mmabovegradelevelsothatpropersupportscanbeprovidedtominimizevibrations.Analogstudyshallbecarriedoutforcompletecompressorpipingincludingsuction/dischargepipingasperP&IDsandthestudyrecommendationsifany,shallbeimplemented.Reciprocatingcompressorpipingshallbeprovidedindependentsupportsfromgradeandshallnotbesupportedfromcompressorplatformstructure.Thesmallborebranchesshallbecheckedforrequirementofbracedsupports.

2.2.9RELIEFSYSTEM/BLOWDOWNSYSTEMPIPING

Wherevertheinletlinesizeishigherthanthesafetyvalveinletsize,reducershallbeinstalledadjacenttoinletofsafetyvalve.




Rev.A

Reliefvalvedischargingsteam,airorothernonflammablevapourorgasdirectlytoatmosphereshallbeequippedwithdrainandshallbesuitablypiped topreventaccumulationofliquidatvalveoutlet.

Liquidphaseblowdownsystempipingconnectedtoaclosedsystemshallbeselfdrainingtotheblowdowndrum.ClosedblowdownheadershallbeslopedtowardstheCBDdrumtoensurefreedrainage.

Liquidvapourphasereliefvalvesshalldischargeintotheflareheaderatanangle45degrees in thedirectionofheader flow, tominimize theeffectofkineticenergyandtoavoidaccumulationofliquid.

Pocketsintheflareheaderandblowdownsystemshallbeprohibited.Reliefvalvedischargepipingshallbetakentosafelocationasperfollowing:

3MAbovetopplatformofcolumnorstructure,within6Mradius

forsteamand8Mforhydrocarbon/toxicdischarge.

25MHorizontallyawayfromfurnace.

50MHorizontallyawayfromfurnace,ifmorethanonerelief

systemofdifferentsetpressuresisdischargingintoone

commonriserofventstack.

Inlet andoutletpipingofpressure reliefvalve shallbe adequately supported totakecareofthethrustinducedbythereliefvalveduringpopping.

Reaction forces including bothmomentum& static pressure effects due to safetyvalvepoppingshallbeascertainedintheconnectedpipingaccordingtoAPIRP520for systems discharging to atmosphere. The effect of these forces on the pipingsupportsand theanchorsof thepipingsystemshallbecalculated toascertain thatthe allowable limits at these locations arenot exceeded.The supporting structurealsoshallbeadequatelydesignedsothatwhensubjectedtothesereactionforcesthesupportingelementsconnected topipingaswellas thebasic supporting structurei.e.platformmembersetc.arecapableofwithstandingthem.Systemstressesintheinlet and outlet piping portions at safety valves also shall be kept within theallowable limits, inclusiveof thedistributionbranchingpoints in the inletportion.Thesereactiveforcesshallnotleadtoanyleakageattheflangedjointspresentinthesystem. To ascertain this the necessary calculations for checking leakage at theflangedjointsshallbeperformed.




Rev.A

2.2.10UTILITYSTATIONS

Requisitenumberofutilitystationsshallbeprovidedthroughouttheunittocatertotheutility requirement. Utility stations shall have three connections [one for LP steam(SL),oneforPlantAir(AP)andoneforServiceWater(WS)]eachof1NBunlessotherwisespecified inP&ID.Airandwater linesshallhavequick typehoseconnectionandsteamline shall have flanged type hose connection and shall be directed downward. Allconnectionsshallhaveglobevalve for isolationpurpose. Inertgashose,whenrequired,shallhavebuiltinnonreturnvalveandquickconnectioncouplingatpipingend.

Numberofutilitystationsshallbesuchthatallequipmentsshallbeapproachablefromatleastoneutilitystation.Theapproachofutilitystationshallbeconsidered15Mallaroundthestationlocation.TheUtilitystationsshallgenerallybelocatedadjacenttopiperackcolumn.Theutilitystationsshallalsobeprovidedonelevatedstructuresliketechnologicalstructure,operatingplatformsofverticalequipmentsetc.Operatingplatformshavingmanholesmustbeaccessiblefromutilitystation.

2.2.11FIREFIGHTING

AllfirefightingfacilitiesshallbeasperTAC&OISDnorms.SprinklersystemshallbeprovidedforallhotpumpsasperOISD/TACnorms.FordetailedguidelinesreferGeneralCivildesignbasisforfireprotection.

2.3OFFSITE&YARDPIPING

Ingeneral,offsitespiping,electricalcableandinstrumentationcableshallbelaideitheronpipe rack or on pipe sleepers. Wherever piping is laid on pipe sleepers, hardsurfacing/gravel isprovidedbelow it,hardsurfacing/gravelshouldbecompletedbeforestartofpipelaying.Widthofhardsurfacing/gravelshallbeabout1metermorethanthepipingcorridoroneitherside.Thisextrahardsurfacing/gravelshallbeformovementofoperatingpersonnelalongthepipingcorridor.Thismovementareashallbeapproachablefromtheroadatadistanceofevery500meters.

Overheadpipebridgesshallbeusedforpipesatroadcrossings.Culverts,ifrequired,maybeprovidedbut tobeminimized.Pipebridges/culvertsshallbeadequatelydesigned totakecareoffuturerequirements.




Rev.A

ClearancesbetweenlinesshallbeminimumCasgivenbelow.

C=(do+Df)/2+25mm+Insulationthickness(es)

where,dooutsidediameterofsmallerpipe(mm)

Dfoutsidediameterofflange(min300#)ofbiggerpipe(mm)

However this Cspacingbetween theoffsitepipingon the rack/sleepercanbesuitablyincreasedsothatthe linesshouldnottoucheachotherafter insulation/lateralexpansion.Adequateclearance shallbeprovided forevery long&high temperature lines toavoidclashingatthebends.See2.2.2alsoforlinespacingatLbendsandlooplocations.

Expansionloopsforalllinesshallgenerallybekeptatthesamelocation.Ventsshallbeprovidedonallhighpoints&drainsshallbeprovidedatalllowpoints.Drainvalvesatsleeperpipingshallbekeptoutsidethesleeperwayifthesameisnotaccessibleandvalvesshallbeputinhorizontalonly.Atallsuchplaceswherepipingisextendedtomakedrainvalvesaccessible2nos.ofstiffeners,irrespectiveofpiperating,shallbeprovidedasper2.7.1.Spacingofguidesoneachlineonapipebayshallnotexceedthevaluegiveninclause2.7.1.

2.4FLAREPIPING

Flare header shall be sloped towards flare knockout drum. Expansion loop shall beprovidedinhorizontalplaneasperrequirementtoaccommodatethermalexpansion.Thedesired slope shall be ensured throughout including flat loop. Flare header shall besupportedonshoeofheightrangingfrom100mmto300mm.

Proper thermal analysis temperature shall be established including the possibility oftemperature gradient along the line before providing expansion loops. Efforts shall bemadetominimizethenumberofloops.

Flarelinebetweenknockoutdrumandwatersealdrumshallbedesignedforpressurefluctuationsandadequatelysupportedtoavoidvibrations.

2.5UNDERGROUNDPIPING

FordesignofundergroundpipingsystemGeneralCivilDesignBasisshallbefollowed.




Rev.A

2.6FLEXIBILITYANALYSISANDSUPPORTING

2.6.1PIPESUPPORTINGCRITERIA&GENERALGUIDELINES.

Pipingsystemshallbeproperlysupportedtakingintoaccountthefollowingpoints:

a.SUSTAINEDLOADS

WeightofPiping(Barepipe,servicefluid,valves,flanges,jackettingetc)WeightofInsulation(ifany)Weightofsnow(ifany)Weightofonlineequipments(ifany)Weightofinstruments(ifany)PressurereliefloadsduetosafetyvalveoperationDynamicloadsduetopulsatingflow/twophasewithslugflowPressureThrustloadsincaseofexpansionjoints

b.OCCASIONALlOADS

Wind/Seismicloads(asandwhenrequired)

c.THERMALLOADS

Thermal loads due to operating/design/steam out/decoking or any other possibleabnormalcondition.

PipesupportingshallpreferablyfollowthebasicspanasgiveninAnnexureAexceptforflarelineinoffsiteontrestlesinwhichcasethebasicspanshallberestrictedtomax.18.0meters. For sizes not covered inAnnexureA, basic span shall be established based onproject requirement. For piping on rack or sleeper, as a minimum, providing restingsupport on every grid ofpipe rack/sleeper ismandatory.Guides shall beprovided onstraightrunofpipesat intervalsasspecified inAnnexureC,unlessspecificallybecomesnonviableduetoflexibilityproblems.

Additional supports, guides, anchors, special supports like spring supports and swaybraces shall be provided based upon detailed analysis of piping system to restrict theforcesonnozzlesofcriticalequipmentslikepumps,compressors,Aircoolersetc.

Apermanentsupport,eitherrestingorspringsupportshallbeprovidedfor lineswhichdonotneedanysupportingotherwisebutrequiresupportingduringmaintenance.

Barepipesofsizeabove12shallbesupportedwithpadorshoe.




Rev.A

Adequate care shallbe taken for smallbore (11/2andbelow)branch frompiping.Asarule, forall lines in600#&aboveclasses, lineshaving twophase flowand lineshavingPulsatingflowsuchasdischargeofreciprocatingcompressors&reciprocatingpumps,allsmallborebranches,e.g.vents,drain,orificetaps,pressuretapings,temperaturetapings,sampleconnections,PSVinlet,TSVinletetc.shallbeprovidedwith2numberstiffenersat90toeachotherfromthemainpipetoimpartadequatestiffnesstothebranchconnection.Thestiffenersshallbemadeof6mmthickflatsofmaterialequivalenttothepipematerial.Further, irrespectiveof linerating, thestiffenersshallbeprovidedforallorifice taps,allsmallbore tapings fromPSV inlet /outlet linesandallsmallbore tapings fromControlValvemanifolds.

Forpulsatingflowlines,detailedthermalandvibrationanalysisbyanalogstudyshallbedonetodecideonlocationofanchorsupportsandguidesetc.

Wherevertwophasewithslugflow inpiping isexpectedandforTransferLines,pipingdesignshallbecheckedbydynamicstressanalysistopreventvibrations.

Pipesupportdesignshallbesuchthatdeflectioninpipingsystemsduetosustainedloadsshallnotexceed15mm,betweentwoadjacentsupports.

Asfaraspossiblelongtrunniontypesofsupports(morethan0.5mtr.)aretobeavoided.Incaselongtrunnionsupportisunavoidableinstraightlengthofpipe,trunnionheighttoberestrictedto0.5mandbalanceheighttobemadeupbyprovidingextendedstructure.

In theheaterswheresteamairdecokingprovision is there, themain linesanddecokinglines should be supported in such away that either of the lines should not be in thehangingpositionwhennotinoperation.

Pipingpassingthroughthetechnologystructureorpassingneartheconcretecolumnetc.should have adequate space to avoid restriction of line movement during thermalexpansion. The gap should take care the thermal expansion along with insulationthickness.

HighdensityPUFblocks shallbe considered for coldpiping supports.Woodenblocksmaybeusedforloadtakingsupportsonverticallinesorasanchorsupports.

Allpipessupportsshallbesodesignedthatthereisnounduetensiononequipmentflanges.




Rev.A

2.6.2FLEXIBILITYANALYSISCRITERIA&GENERALGUIDELINES.

Pipingshallbeanalyzedforexpansion,contraction,differentialsettlement,reliefvalvereactionandeffectsmentionedinpara2.7.1.

Thedesignofpipingsystemsshalltakeintoaccountthedifferentconditionsexpectedduringoperation,startup,shutdown,coldbranchincaseofstandbypump,tracing,etc.Hydrocarbonlinesshallbedesignedforsteamoutconditions,ifsospecifiedinProcessdocument.Systemwherecombinationofdifferentoperatingconditionsareenvisaged,suchsystemshallbeanalyzedforallpossiblecombinations.Theuseofexpansionjointsshallbeconsideredonlywhenspaceorpressuredroplimitationdoesnotpermitpipebends.Expansionjointofaxialtypeshallgenerallybeavoided.Forcesandmomentsduetoweight,thermalloadsandotherimposedloadsontheequipmentnozzlemustnotexceedtheallowedloadsfortheequipment.Incasethesameisexceeded,categoricalwrittenconfirmationofacceptanceofthehigherloadsshallbeobtainedfromtheequipmentsupplier.

2.6.3METHODOFANALYSIS

Followinglinesshallbeconsideredcriticalandfortheseformalanalysisismandatory.Otherlinesmayalsoneedanalysis,ifrequired:

Allprocesslinestoandfromfiredheatersandsteamgenerators

Allprocesslinestoandfromcentrifugalcompressorandblower

Alllinestoandfromturbines

Allpumplines(6&aboveandanalysistemp>120C&lessthan60C)&aircoolerlines.

Reboilerpiping,Flareheader/subheaders,Jacketedlines,NonmetallicPiping




Rev.A

Allotherlinesasbelow:6to8analysistempabove300C&lessthan100C10to14analysistempabove150C&lessthan80C16&aboveanalysistempabove100C&lessthan80C

Linesrequiringcompositestressanalysis(PipingalongwithStructureandEquipments),Dynamic/Wind/SeismicanalysisLinesrequiringFlangeleakagecheck,i.e.26&aboveexceptair&waterlines(upto600rating)4&aboveforhydrogenlines(900ratingandabove)8&above,otherlines(900ratingandabove)Allothercriticallines(connectingtosensitiveequipments).SuchasPlatefinexchangers,Coldboxes(sizes6andaboveandanalysistemp.>120C&lessthan60C)OnlyCAESARIIsoftwarepackageshallbeused.

Alllinesshallbeanalyzedatanalysistemperature.Intheabsenceofanalysistemperature,linesshallbeanalyzedatoperatingtemperatureifdifferencebetweenoperating&designtemperaturesislessthanorequalto30degC,otherwiseitshallbeanalyzedatdesigntemperature.However,analysisofflareline&calculationofthermalgrowthoftallequipmentsshallbedoneasperProcessinput.

Forlinesinvolvingpulsatingflowsuchasthoseconnectedtoreciprocatingpumps&compressors,inadditiontothermalanalysis,analogstudyforacoustic&mechanicalvibrationsshallbedonealongwithequipments,byapprovedvendor/Agency.

DynamicanalysisshallbeperformedwherevertwophasewithslugflowinpipingisexpectedaspertheprocessrequirementandforTransferLines.Thefundamentalfrequencyofthepipingsystemshallbewellabovetheimposedfrequencies,ifany,toavoidresonance.Theminimumacceptablefrequencyfortransferlinesshallbe7Hzandforremaininglineswithslugflow,itshallbe6Hz.




Rev.A

SeismicandwindforcesshallbebasedonrecommendationsofSeismicdesignbasisandWinddesignbasisrespectivelyofPNCPcoveredelsewhere.

2.7MATERIALS

Basicmaterialselectionofparticularlinedependingonitsservice,temperatureandCorrosivityshallbeasspeltoutinprocesspackage.Detailedmaterialspecificationshallfollowtherequirementsstatedherewith,exceptwhereverspecifiedasperLicensorsrequirement.

2.7.1PIPE

2.7.1.1WALLTHICKNESS

CalculationofpipethicknessandbranchreinforcementshallbebasedonrequirementsofASMEB31.3/IBRasapplicable.Propercorrosionallowanceandmilltoleranceshallbeconsideredwhileselectingnominalthickness.

Forcarbonsteelandlowalloysteelpipesminimumpipethicknessshallbeasfollows:

S160upto0.75NB(forotherthansteamtracing),

XSupto0.75NB(forsteamtracing),

XSfor1to2NB,

STDforabove2NB.

Forstainlesspipesminimumpipethicknessshallbeasfollows:

80Supto0.75NB,

40Sfor1NBto2NB,

10Sforabove2NB

Thephilosophyofminimumthickness/scheduleisapplicableforbothseamlessandweldedpipes

The abovementionedminimum thickness/schedule criteria is not applicable tocategoryDclasses(forservicesinA3A,A3Yspecsetc),firewaterservice(A33A)andA10AspecificationwhereISpipesorweldedAPI5Lpipesarebeingused.




Rev.A

All pipes (seamless & welded) shall have uniform negative wall thicknesstoleranceof12.5%forwallthicknesscalculationspurpose.

Forthicknessesexceedingminimumthickness/schedulecriteria,scheduleXSshallbeselectedforCS&ASclasses(for2&above).IntermediateschedulesbetweenSTD&XSshallbeignored.SimilarlyforSSclasses(2&above)S10,S20,S30&40Smaybeselectedbeyondminimumthickness/schedulecriteria.If,thethicknessesexceedXSinCS&ASclassesand40SinSSclasses,onlythen,thethicknessshallbecalculatedbasedonactualserviceconditionssubjecttoaminimumof80%classrating.Maximum10%ofcorrosionallowancemaybereducedinspecialcases,tooptimizethepipeschedules.Ingeneral,thepressuretemperaturecombinationtocalculatewallthicknessshallbeasfollows:




Rev.A

Material Class Size Design condition

C.S. (A106 GR.B, API-5L GR.B, A672)

LTCS (A333 GR.6),

Low Alloys,

1.25% Cr-0.5% Mo, 2.25% Cr- 1.0% Mo,

5%Cr-0.5% Mo, 9%Cr- 1.0% Mo

150

upto 24" Class condition above 24" Line condition (#)

300

upto 14" Class condition above 14" Line condition (#)

600

upto 8" Class condition

above 8" Line condition (#)

900 upto 8" Class condition

above 8" Line condition

1500 & 2500 upto 4" Class condition above 4" Line condition

SS

(A312 TP304, 304L, 316L, 321,347) OR

(A358 TP304, 304L, 316, 316L, 321, 347)

150

up to 24" Class condition

above 24" Line condition ($)

300



Material Class Size Design Condition 600 upto 6" Class condition

900,1500




2500



Higher Alloys

150


above 6" Line condition 300-2500 all sizes Line condition

#OnlyIfthethickness/scheduleasperclassconditionexceedsXS.$OnlyIfthethickness/scheduleasperclassconditionexceeds40S.ForCatDclasses,forabovegroundapplications,D/tratioshallbetakenas120(max.).ForotherthanCatDservices,D/tratioshallbegenerallyrestrictedto100.Disnominaldia.andtisnominalthickness.




Rev.A

2.7.1.2PIPESIZE

Pipesizesshallnormallybe0.5,0.75,1.0,1.5,2.0,3,4,6,8,10,12,14,16,18,20,

2.7.1.3PIPETYPE

Material Size Type CS, LTCS, AS (except for Cat D fluids & LP hydrocarbons in offsites)

Upto 14"

Seamless

16" and Above

E.F.S.W.

SS (Process lines)

Upto 8"

Seamless

10" and Above

E.F.S.W.

SS (Non process lines)

Upto 1.50"

Seamless

2" & Above

Welded

CS (Cat D fluids & Fire water service)

ALL

Welded*

CS (LP hydrocarbons offsites)

Upto 6"

Seamless

Above 6" Welded




Rev.A

*LimitedtoCatDservices&Firewaterserviceswithfollowingexceptions:

ForU/Gpipesincoolingwater&Firewaterservices:6&belowA106GrBSeamless8&aboveIS3589Gr330Welded/ASTMA53Gr.BWelded/API5LGr.BWelded(Forcoolingwaterservices)8&above IS3589Gr410Welded/A53Gr.BWelded/API5LGr.BWelded (Forfirewaterservices)

2.7.2FITTINGS

Typeoffittingsshallbeequivalenttopipetype.

ThicknessoffittingsatendstomatchpipethicknessforBWfittings.

SWfittingsshallbe3000#,6000#or9000#dependingonthepipethicknessesS80,S160andaboveS160respectively.

Upto600#allbranchconnectionsshallbeasfollows,unlessspecificallymentionedotherwiseinPMS:

Upto11/2NBHalfcouplings/Tee

2andaboveTees/Pipetopipewithorwithoutreinforcementpad

Forbranchconnectionsabove600#rating,equaltee/unequalteeshallbeusedforall sizes. Incaseofnonavailabilityofunequal tees,oletsmaybeused. Usageofsweepoletshallbeavoidedduetopooravailabilityglobally.

MitresshallbeusedinCategoryDserviceabove6NB.Elbows(seamless/welded)are acceptable inplace ofmitres, however, thickness of elbows shall be same asmitres.Seamlesselbowsareacceptableinplaceofweldedelbows.

Forother thanCategory D fluid in150#and300#Classmitrescanbepermittedfor sizes above 48.Mitres to be designed as perASME B31.3.However, use ofmitresshallbeminimum.

UnionshallnottobeusedinlinesotherthanCatDwaterlines.




Rev.A

2.7.3.FLANGES

Flangesshallbeasfollows:

Rating

Size

Type

Remarks

150

Up to 1.50"

SW RF

If used with non metallic gasket

Up to 1.50"

WN RF

If metallic/spiral wound gasket is used

2" & above

WN RF

For CS (Other than Cat-D), AS & SS(Cryo)

2" & above

LJ FF+Stub ends

For SS (Other than Cryo)

2" & above

SO FF

For CAT-D service

300,600

Up to 1.50"

SW RF

2" & above

WN RF

900

All

WN RTJ

Allflangejointsonpipingsystemincludingflangesontheequipment,manholes,etcshallbetightenedusingHydraulicbolttensioneraspertherequirementgiveninthefollowingtable&thestudboltlengthshallbelongerbyonediametertofacilitatebolttensioning:




Rev.A

Notes:1) Hydrogen service is defined as service in contact with hydrogen or gaseousmixturescontaininghydrogen inwhich thepartialpressureofhydrogen is5barormore.2)Jointswithleakagepotentialshallincludea)Jointsinvolvingtappedholesb)Itemsnotsubjectedtohydrotesteg.Jointsforequipmentmanholes,equipment

mounted temp, pressure& level instruments, linemounted temp connections,onlineinstrumentjointslikecontrolvalvesandsafetyvalves,compressorvolumebottles.c)Itemsinvolvingtwosetsofgasketswithonesetofboltegorificeflangejoint,joints with spectacle blind, spacer, flangeless wafer check valve, wafer typebutterflyvalves.d)TieinjointswithotherContractors&packagevendorse)Hightemperature(above370degC)jointsinhydrocarbonservice.

Nominal Bolt Diameter

Condition

Remarks

All

When specified by Process licensor/ Vendor/Project Specifications

50 mm & over

All Joints

Except under Cat-D service, as defined in ASME B31.3

38 mm & above & below 50mm

a) Class 600 & above b) Hydrogen service (Note-1) c) Cat-M service as per ASME B31.3 d) Joints with leakage potential (Note-2) e) Critical joints with equipments (Note-3

25 mm & above & below 38mm

a) Joints with leakage potential (Note-2) b) Critical joints with equipments (Note-3)




Rev.A

3)Criticaljointswithequipmentsshallincludeinlet&outletflangesofpumps,compressors&turbinesForflangeassembliesnotcoveredundertherequirementsofhydraulicbolt

tensioning,butfallinginthefollowingcategoriesBoltTorquingusingprespecified

torquevalueshallbeemployed:

Service Classes (as per ASME B16.5)

Hydrogen Service All

Category-M services as per ASME B31.3

All

Other Services 600# & above




Rev.A

2.7.4GASKETSGasketsshallbeasfollows: Rating

Material /service

Temperature (0C)

Type

Gasket or Strip material + Filler material/RTJ Gasket Material

150

CS & SS (utilities)

up to 371 0C

PLAIN

CAF

150

CS & LTCS (other than utilities)

up to 371 0C

Spiral wound

SS316+CAF

150

AS (all services)

up to 371 0C

Spiral wound

SS316+CAF

300 & 600

CS

up to 427 0C

Spiral wound

SS316+CAF

300 & 600

AS

All

Spiral wound

SS316+Grafoil

150, 300, 600

SS (other than utilities

All

Spiral wound

SS316+Grafoil (where trim material is SS304/316) SS316L+Grafoil (where trim material is SS304L/316L

300(*), 600(*),900, 1500,2500

CS

All

Octagonal RTJ

Soft Iron

300(*), 600(*), 900, 1500,2500

AS

All

Octagonal RTJ

5Cr-Alloy steel

300(*), 600(*), 900, 1500,2500

SS

All

Octagonal RTJ

SS

OnlyifRTJisspeciallymentionedinPMS.




Rev.A

2.7.5VALVES

SWvalvesUpto1inch,for150#,300#,600#(exceptball&plugvalves).Ball&Plugvalvesshallbeflangedforallsizes.FlangedvalveAbove1inchfor150#,300#,600#.BWvalves900#andabove2.7.5Overandabovetherequirementsspecifiedinclause2.7.1through2.7.5,othertechnicalrequirementprescribedinAnnexureDshallalsobeadheredto.

2.7.7NDERequirements(IfnotspecifiedinPMS)

Dependingupontheseverityofapplication,extentofNDEshallbedecided.Asarule,allhydrogen,oxygen,NACEandanyotherlethalserviceshallhave100%radiographyonweldjointsinallclassratings.Forhighpressureapplications,ie.,900#andupward100%radiographyonbuttweldjointsshallbeemployed.In100%radiographyclassesanyfilletweldsemployedshallhave100%DP/MPtestinCS/ASclassesand100%DPtestinSSclasses.Cat.DserviceasperASMEB31.3doesnotrequireradiography.ButtweldsforClassin150#fornormalhydrocarbonserviceshallbesubjectedto10%radiographyandfilletweldsto10%DP/MPtestforCS&ASand10%DPtestforSS.ButtweldsforClasses300#&600#fornormalhydrocarbonserviceshallbesubjectedto20%radiographyandfilletweldsto20%DP/MPtestforCS&ASand20%DPtestforSS.Forfirewaterservice,IBRetc.,radiographyshallbeasperstatutoryrequirement.




Rev.A

2.8THERMALINSULATIONOFPIPING,EQUIPMENT&VESSELS

2.8.1HOTINSULATION

Insulationmaterials,applicationetc.shallbebasedonrecommendationsofStandardspecificationforhotinsulationofvessels,pipingandequipments(Doc.No.6440002).InsulationthicknessonpipingshallbeasperProcessdesignbasis.

2.8.2COLDINSULATION

Insulationmaterials,applicationetc.shallbebasedonrecommendationsofStandardspecificationforcoldinsulationofvessels,pipingandequipment(Doc.No.6440003).InsulationthicknessonpipingshallbeasperProcessdesignbasis.

2.9PAINTING

Paintingmaterials,applicationetc.shallbebasedonrecommendationsofJobspecificationforshop&fieldpaintingforPNCP(Doc.No.6556642PTA05).

2.10WELDING

2.10.1APPLICABLECODES&STANDARDS

Allweldingwork, equipment forwelding,heat treatment, other auxiliary functions and theweldingpersonnelshallmeettherequirementsofthe latesteditionsofthefollowingacceptedstandardsandprocedures:

a)ProcessPipingASME:B31.3

b)TheIndianBoilerRegulationsI.B.R.

Inaddition, the followingcodesandspecificationsreferred in thecodeof fabricationshallbefollowed for the welding specifications, consumable qualifications and non destructive testprocedures.

WeldingandBrazingQualificationsASMEBPVSec.IX.

NondestructiveexaminationASMEBPVSec.V.

Materialspecifications:Weldingrods,electrodesandfillermetalsASMEBPVSecIIPartC.




Rev.A

Theadditionalrequirementsmentionedinthisspecification,overandabovethoseobligatoryaspercodes,shallbefollowedwhereverspecified.

2.10.2WELDINGPROCESSES

2.10.2.1 Welding of various materials shall be carried out using one or more of thefollowingprocesseswiththeapprovaloftheEngineerincharge.

ShieldedMetalArcWeldingprocess(SMAW)GasTungstenArcWeldingprocess(GTAW).

2.10.2.2Automaticandsemiautomaticweldingprocessesshallbeemployedonlywiththeexpress approval of the Engineerincharge. The welding procedure adopted andconsumablesusedshallbespecificiallyapproved.2.10.2.3Acombinationofdifferentweldingprocessescouldbeemployedforaparticularjointonlyafterdulyqualifying theweldingprocedure tobeadoptedandobtaining theapprovalofengineerinCharge.2.10.2.4ForadditionaldetailsWeldingSpecificationforFabricationofPiping6770001shallbereferred.

2.11MISCELLANEOUS

2.11.1Positivematerial identification(PMI) testat construction site shallbedoneasperStandardSpecification forpositivematerial identificationPMIatconstructionsite,6820002.

2.11.2Potablewater shallbeused for testingofCarbon steel&Alloy steelpiping.FortestingofStainlessSteelpipingmaximumchlorinecontentinwatershallbe1520ppm.

2.11.3Itemcodesforsurplus&sparematerialsshallbeasperOwnercodesatthetimeofhandingoveroftheProject.

2.11.4Allsmallborepipingandsteamtracerlines,sizeandbelowshallbeweldedbyTIGprocessforalltypeofjoints,e.g.ButtWeld,SocketWeld,teeetc.




Rev.A

2.11.5Preheating/PostheatingismandatoryforalltypeofAlloysteelpipingweldingjoints.

2.11.6Alllowhydrogenelectrodesshallbebakedat350deg.Cinsuitablefurnaceatsitebythecontractor.2.11.7WeldingofAlloysteelbuttjointsshouldnotbeleftincompleteforlonghours;atleastonethirdoftheweldjointshallbecompletedincontinuity.




Rev.A

3.0REFERENCEDPUBLICATIONS

Thefollowingcodesandstandardsshallbefollowedunlessotherwisespecified:ASMESEC.IRulesforConstructionofPowerBoilers.ASMESEC.II,PartCMaterialSpecifications:WeldingRods,ElectrodesandfillermetalsASMESEC.VIIIRulesforConstructionofPressureVessels.ASMESEC.IXWeldingandBrazingqualificationsASMEB31.1PowerPipingASMEB31.3ProcessPipingAPIRP520Sizing,Selection&InstallationofPressureRelievingDevicesinRefineriesAPIStd.610CentrifugalPumpsforPetroleum,HeavyDutyChemicalandGasIndustryServiceANSI/NEMASM23SteamTurbinesforMechanicalDriveServiceAPIStd.617CentrifugalCompressorsforPetroleum,ChemicalandGasIndustryServiceAPIStd.661AirCooledHeatExchangerAPIStd.560FiredHeaterEJMAExpansionJointsManufacturersAssociationTEMATubularExchangersManufacturersAssociationOISD118LayoutsforOilandGasInstallationsIBRIndianBoilerRegulationsNACEMR0103MaterialsResistanttoSulfideStressCrackinginCorrosivePetroleumRefiningEnvironmentsResistantMetallicMaterialsforOilfieldEquipmentNACEMR0175/ISO15156MaterialsforuseinH2ScontainingEnvironmentsinOil&GasProductionNACEMR0284EvaluationofPipelineandPressureVesselSteelforResistancetoHydrogenInducedCrackingNACETM0177LaboratoryTestingofMetalsforResistancetoSulfideStressCrackinginH2SEnvironments




Rev.A

AnnexureATABLEOFBASICSPAN

Pipe Size NB (inch)

SCH/ THK (in)

PIPE VAPOR-INSULATION

PIPE-LIQUID-INSULATION

BARE PIPE EMPTY

BARE PIPE WATER FILLED

Pipe Size NB (inch)

BASIC SPAN (L) M BASIC SPAN (L) M Upto 175 0C

176 0C To 315 0C

316 0C To 400 0C

Upto 175 0C

176 0C To 315 0C

316 0C To 400 0C

SPAN (L)M

Weig ht KG/M

SPA N (L) M

Weig ht KG/M

3/4" SCH 40 3.5 3.5 2.5 3.5 3.0 2.0 4.5 1.68 4.0 2.04 3/4"1" SCH 40 4.5 4.0 3.0 4.5 3.5 3.0 5.0 2.52 4.5 3.07 1"

1-1/2" SCH 40 5.0 5.0 4.5 5.0 4.5 3.5 6.0 4.08 5.0 5.4 1-1/2"2" SCH 40 5.5 5.0 4.5 5.0 4.5 3.5 6.5 5.47 5.5 7.65 2"

2- 1/2" SCH 40 6.5 6.0 5.0 6.0 5.5 4.5 7.5 8.7 6.5 11.79 2-1/2"3" SCH 40 7.5 6.5 5.5 6.5 6.0 5.0 8.0 11.35 6.5 16.5 3"4" SCH 40 8.0 7.5 6.5 7.5 7.0 6.0 9.0 16.2 7.5 24.45 4"6" SCH 40 10.0 9.5 8.5 9.0 8.0 7.5 10.5 28.3 9.0 46.7 6"8" SCH 40 12.0 11.0 10.0 10.0 10.0 9.0 12.0 42.84 10.0 75.22 8"10" SCH 40 13.5 13.0 12.0 11.5 10.5 10.5 14.0 60.74 11.5 111.9 10"12" 3/8" w 14.5 13.5 13.0 12.0 11.5 11.0 15.0 74.40 12.0 147.5 12"14" 3/8" w 15.0 14.5 13.5 12.0 12.0 11.5 16.0 82.5 12.5 172.05 14"16" 3/8" w 16.0 15.5 14.5 13.0 12.5 12.0 17.0 94.5 13.0 213.15 16"18" 3/8" w 17.0 16.5 15.0 13.5 13.0 12.0 18.0 106.5 13.5 258.3 18"20" 3/8" w 18.0 17.5 16.0 14.0 13.5 12.5 19.0 118.5 14.0 307.5 20"24" 3/8" w 20.0 19.0 17.5 14.5 14.5 13.0 21.0 142.5 15.0 418.2 24"3/4" SCH 80 3.5 3.5 2.5 3.5 3.0 2.0 4.5 2.20 4.0 2.49 3/4"1" SCH 80 4.5 4.0 3.0 4.5 3.5 3.0 5.0 3.25 4.5 3.72 1"

1-1/2" SCH 80 5.0 5.0 4.5 5.0 4.5 4.0 6.0 5.45 5.0 6.60 1-1/2"2" SCH 80 6.0 5.0 4.5 5.5 5.0 4.0 6.5 7.53 6.0 9.45 2"

2-1/2" SCH 80 6.5 6.0 5.5 6.0 6.0 5.0 7.5 11.49 6.5 14.25 2-1/2"3" SCH 80 7.5 6.5 6.0 6.5 6.5 6.0 8.0 15.37 7.0 19.66 3"4" SCH 80 8.0 8.0 7.0 7.5 7.5 6.5 9.0 22.47 8.0 29.94 4"6" SCH 80 10.5 10.0 9.0 9.5 9.0 8.5 10.5 42.90 9.5 59.85 6"8" 1/2" w 12.0 11.5 10.5 10.5 10.0 10.0 12.0 65.10 11.0 94.8 8"10" 1/2" w 13.5 13.0 12.0 11.5 11.5 10.5 14.0 82.20 12.0 130.69 10"12" 1/2" w 14.5 13.5 13.0 12.5 12.0 11.5 15.0 98.13 13.0 168.64 12"14" 1/2" w 15.0 14.5 13.5 13.0 12.5 12.0 16.0 108.15 13.5 194.4 14"16" 1/2" w 16.0 15.5 15.0 13.5 13.0 13.0 17.0 124.2 14.0 240.0 16"18" 1/2" w 17.5 17.0 16.0 14.5 13.5 13.5 18.0 140.25 14.5 286.64 18"20" 1/2" w 18.0 17.5 17.0 15.0 14.5 14.0 19.0 157.5 15.0 341.8 20"24" 1/2" w 20.0 19.0 18.5 16.0 15.0 15.0 21.0 188.25 16.0 458.44 24"1" 10 S 4.0 3.5 3.0 4.0 3.0 2.5 4.5 2.08 4.0 2.7 1"

1-1/2" 10 S 5.0 4.5 3.5 4.5 4.0 3.0 5.5 3.12 5.0 4.57 1-1/2"2" 10 S 5.0 4.5 3.5 4.5 4.0 3.0 6.0 3.94 5.5 6.33 2"

2-1/2" 10 S 6.5 5.5 4.5 5.5 5.0 4.5 7.0 5.26 6.0 8.85 2-1/2"




Rev.A

3" 10 S 7.0 6.0 5.0 6.0 5.5 5.0 7.5 6.45 6.0 11.91 3"4" 10 S 7.5 7.0 6.0 6.5 6.0 6.0 8.0 8.34 7.0 17.67 4"6" 10 S 9.5 9.0 8.0 8.0 7.5 7.5 10.0 13.82 8.5 34.54 6" 8" 10 S 11.0 10.5 10.0 9.5 9.5 8.5 11.5 19.94 10.0 55.5 8"10" 10 S 12.5 12.0 11.0 10.5 10.0 9.5 13.0 27.83 11.0 83.4 10"12" 10 S 14.0 13.0 12.0 11.0 11.0 10.0 14.5 36.00 11.5 114.6 12"14" 10 S 14.5 14.0 13.0 11.5 11.0 11.0 15.5 41.18 11.5 132.6 14"16" 10 S 16.5 14.5 14.0 12.0 11.5 11.5 16.5 47.33 12.5 172.2 16"18" 10 S 16.5 15.5 14.5 12.5 12.5 11.5 17.5 53.18 13.0 212.1 18"20" 10 S 17.5 16.5 15.5 13.0 13.0 12.0 18.5 68.50 13.0 264.5 20"24" 10 S 19.0 18.0 17.0 14.0 13.5 12.5 20.5 94.37 14.0 376.8 24"




Rev.A

AnnexureBAccessibilityforValves&Instruments VALVES,INSTRUMENTS,CENTRELINEOFITEMTOBEOPERATED,CENTRELINEOFITEMTOBEEQUIPMENTTOBEOPERATEDLOCATEDLESSTHAN3.6mABOVEOPERATED,LOCATEDGRADE,2.75mABOVEFLOORORMORETHAN3.6mABOVEPLATFORMOR1.8mABOVEWINGGRADE,2.75mABOVEPLATFORMFLOORORPLATFORMOR1.8mABOVEWINGPLATFORM

EXCHANGERHEADSNILPLATFORMOPER.VALVES2&SMALLERFIXEDLADDERFIXEDLADDEROPER.VALVES3&ABOVEPLATFORMPLATFORMMOTOROPERATEDVALVESPLATFORMPLATFORMCONTROLVALVESPLATFORMPLATFORMRELIEFVALVES2&SMALLERFIXEDLADDERFIXEDLADDERRELIEFVALVES3&ABOVEPLATFORMPLATFORMBLOCKVALVES2&SMALLERPORTABLELADDERPLATFORMBLOCKVALVES3&ABOVEPLATFORM(NOTE1)PLATFORM(NOTE1)BATTERYLIMITVALVESPLATFORMPLATFORMPRESSUREINSTRUMENTFIXEDLADDERIFABOVE2.2mHEIGHTFIXEDLADDERTEMPERATUREINSTRUMENTFIXEDLADDERIFABOVE2.2mHEIGHTFIXEDLADDERSAMPLEPOINTSPLATFORMPLATFORMGAUGEGLASSESFIXEDLADDERFIXEDLADDERLEVELCONTROLLERSPLATFORMPLATFORMPROCESSBLINDSANDSPACERSPORTABLELADDER/PLATFORMPLATFORM2&SMALLERPROCESSBLINDSANDSPACERSPLATFORMPLATFORM3&ABOVEMANWAYS/MANHOLESPLATFORMPLATFORMHANDHOLES/INSPECTIONHOLESPLATFORMPLATFORM




Rev.A

NOZZLESNOACCESSREQD.(NOTE2)NOACCESSREQD.(NOTE2)VESSELVENTSPORTABLELADDERFIXEDLADDERLINEDRAINS&VENTSPORTABLELADDERPORTABLELADDERORIFICEFLANGESPORTABLELADDERPORTABLELADDER

NOTE1:BLOCKVALVESWITHCENTRELINESLOCATEDABOVE2.0mFROMTHEOPERATINGFLOOR,WHICHAREREQUIREDFORNORMALOPERATIONSHALLBEPROVIDEDWITHPORTABLEPLATFORMORCHAINFOROPERATIONOFVALVES.NOTE2:TEMPORARYARRANGEMENTFORACCESSSHOULDBEFEASIBLE.




Rev.A

AnnexureCVerticalandHorizontalGuidesSpacing NOM PIPE SIZE IN INCHES

VERTICAL SPACING METRES

HORIZONTAL SPACING METRES(NOTE-1)

1 6.0 6.0 1 6.0 6.0

2 6.0 6.0 3 8.0 12.0 4 8.0 12.0 6 8.0 12.0 8 8.0 12.0 10 12.0 18.0 12 12.0 18.0 14 12.0 18.0 16 12.0 18.0 18 12.0 18.0 20 16.0 18.0 24 16.0 18.0

26 and above 16.0 18.0 Notes:

1.Thesespacingsmaybevariedtosuitcolumnspacingofrack.Theabovespacingisforstraightrunsofpipe&doesnotincludeguideswhichareusedforcontrolofthermalmovements,asdecidedbystressgroup.2.Theguidespacingsgivenintheabovetableareindicativeonly.




Rev.A

`AnnexureDTechnicalRequirementsforPipingMaterial 1.0General1.1Ends

Unlessotherwisespecified,theendsshallbetothefollowingstandard:SW/SCRD:ASMEB16.11BW:ASMEB16.25FLANGED:ASMEB16.5andASMEB16.47SERIESBTHREADING:ASME/ANSIB1.20.1(NPT,Taperthreads)

1.2FaceFinish

ThisshallbetoMSSSP6/ASMEB46.1/ASMEB16.5/B16.47.Theinterpretationshallbeasfollows:StockFinish:2501000inAARHSerratedFinish/SmoothFinish/125AARH:125250inAARHExtraSmoothFinish/63AARH:3263inAARH

1.3AusteniticStainlessSteel

Allitems/partsshallbesuppliedinsolutionannealedcondition.

ForallAusteniticStainlesssteels,IntergranularCorrosion(IGC)Testshallbeconductedasperfollowing:

ASTMA262PracticeBwithacceptancecriteriaof60mils/year(max.)forcasting.

ASTM A262 Practice E with acceptance criteria of No cracks as observed from20Xmagnification&microscopicstructure tobeobserved from250Xmagnification forotherthancasting.

For IGC test, two sets shall be drawn from each solution annealing lot; one setcorresponding to highest carbon content and other set corresponding to the highestrating/thickness.




Rev.A

ForallitemsofstabilizedSSgrades(SS321,SS347),stabilizingheattreatmentshallalsobedone. It shall be carried out subsequent to normal solution annealing. Soakingtemperatureandholdingtimeshallbe900Cand4hrsrespectively.

1.4Threads

ThreadsforthreadedPipes,Fittings,Flanges,ValvesetcshallbeinaccordancewithB1.20.1taperthreads,unlessotherwisespecified.Allthreadedjoints,irrespectiveofpressureandtemperature,forcriticalservicesincludingtoxicfluid,hydrogenetcshallbesealweldedwithafullstrengthfilletweld.

2.0ITEMSPECIFICNOTES: 2.1Pipes

Unlessspecificallyexempted,weldedpipesshallbeacceptableonlywithlongitudinalweldmadeemployingautomaticwelding.Unlessmentionedotherwiseinthematerialcode,doubleseam180deg.apartisallowedforsizes36andlargeronly.GalvanizedPipesshallbeonlyHotDipgalv.toASTMA53.

2.2Fittings

Allfittingsshallbeseamlessinconstructionunlessotherwisespecified.

ForreducingBWfittingshavingdifferentwallthicknessateachend,thegreateroneshallbeemployedandtheendsshallbematchedtosuitrespectivethickness.

Allweldedfittingsshallhavemaximumnegativetoleranceequivalenttopipeselected.

All welded fittings shall be double welded. Inside weld projection shall not exceed1.6mm,andtheweldsshallbegroundsmoothatleast25mmfromtheends.

For fittingsmade out ofwelded pipe, the pipe itself shall be of doublewelded type,manufacturedwiththeadditionoffillermaterialandmadeemployingautomaticweldingonly.




Rev.A

AllweldedfittingsshallbenormalizedforCS,normalized&temperedforAS;and100%radiographedbyXrayforallweldsmadebyfittingmanufactureraswellasforweldsontheparentmaterial.

BevelendsofallBWfittingsshallundergo100%MP/DPtest.

Thoseusedinfirefightingfacilitiesshallbemarked.

2.3Flanges

ForRingJointFlanges,BlindsandSpacers,thehardnessshallbeasfollows:FlangeMaterialMin.HardnessofGroove(BHN)CarbonSteel1401%Crto5%Cr,1/2Mo150Type304,316,347,321160Type304L.316L140ForRTJflanges,blinds&spacers,thehardnessofthegrooveshallbespecifiedonthetestreport.Boreofweldneckflangeshallcorrespondtotheinsidediameterofpipeforspecifiedschedule/thickness.Endsshallbebevelledtosuitthespecifiedschedule/thickness.ForRTJflanges,onlyoctagonalsectionringjointflangesshallbeused.

2.4Valves

2.4.1General

Valves ofClass 900& above shall bepressureseal type.Threaded and sealwelded orweldedbonnetmaybeemployeduptosizes11/2.

Allflangedvalves(exceptforged)shallhaveflangesintegralwiththevalvebody.Weldonflangesshallbemadebyfullpenetrationjointsand100%radiographed.

Valve Castings/Forgings purchased from India or Indian vendors shall be from EILapprovedfoundries/forgingshop.

Yokematerialshallbeatleastequaltobodymaterial.

ForgingsareacceptableinplaceofCastingsbutnotviceversa.

Nocastironvalvestobeusedinfirewateroranyotherserviceexcept indrinkingwaterservice.




Rev.A

2.4.2Dimensions

FacetoFace/EndtoEnddimensionshallbeasperANSIB16.10.IncasethesameisnotcoveredunderB16.10,thedimensionshallbeasperBS2080/ManufacturersStd.Valveundercryogenicservice(temp.below45C)shallmeettherequirementsofBS6364andshallbeprocuredfromprequalifiedvendor.

2.4.3Operation

Generallythevalvesarehandwheelorleveroperated.However,suitablegearoperatorinenclosedgearboxshallbeprovidedforvalvesasfollows:ValveTypeClassForSizesGate/Globe150123001260012Gate/Globe/YGlobe/9006StopCheck1500325003Ball/Plug(otherthan1506PressurebalancedPlug)30066004900315003Butterfly15063006

Handwheeldiametershallnotexceed750mmandleverlengthshallnotexceed500mmoneachside.Efforttooperateshallnotexceed35kgfathandwheelperiphery.However,failingtomeettheaboverequirement,vendorshalloffergearoperation.Quarterturnvalvesshallhaveopenpositionindicatorswithlimitstops.




Rev.A

2.4.4ByPass

Aglobetypevalve(sizeasperASME/ANSIB16.34)shallbeprovidedasbypassforthefollowingsizesofgatevalves:

ClassSize15026&above30016&above6006&above9004&above15004&above25003&aboveBypassPiping,FittingandValvesshallbeofcompatiblematerialanddesign.CompletefilletweldsforbypassinstallationshallbeDP/MPtested.NDTofbypassvalveshallbeinlinewithmainvalve.

2.4.5RadiographyofCastValves

Allcastingshallbeofradiographicquality.Thisrequirementtobeensuredbysampleradiographybeforeproceedingwiththeactualproduction.Radiographyprocedure,areasofcastingtoberadiographed,andtheacceptancecriteriashallbeasperASME/ANSIB16.34.a)Radiographyrequirementforcastingofsizesforspecial/criticalpipingclassesshallbeasfollows:i)Forhydrogen/hydrogenbearinghydrocarbons,oxygen,NACEservices&stressrelievedPipingclasses:ClassSizeqty150upto2450%300upto1650%




Rev.A

ii)ForLT/CRYOservices:

ClassSizeqty150upto2420%300upto1620%b)Radiographyrequirementforcastingsforcategoriesnotmentionedina)aboveshallbeasfollows:ClassSizeqty150upto245%ForCarbonSteelmaterial(ExceptCatD&FirewaterservicesforwhichitisNIL)150upto2410%ForAlloysteels&StainlessSteels15026&above100%Forallmaterials(NilforCat.D&Firewaterservice)300upto1610%Forallmaterials30018&above100%Forallmaterials600&aboveAll100%ForallmaterialsNote1NoradiographyisrequiredforcastingsforDemineralisedWaterservice(CatD)A3KSpec.Note2ForstabilizedgradesofSS100%radiographyisrequiredforcastingsirrespectiveofthecategoryorratingthesebelongto.

2.4.6Ball/Plug/ButterflyValves

Eachvalveshallbesuppliedwithalever/wrenchexceptforgearoperated/motoroperatedvalves.

SoftseatedBall,Plug&Butterflyvalvesshallbesuppliedwithantistaticdevices.

TheballofBallvalvesshallnotprotrudeoutsidetheendflanges.

Ballvalvesshallbefloatingballtype/trunionmountedtypeasperfollowing:




Rev.A

ClassFloatingBallTrunionMounted1508&below10&above3004&below6&above600&above11/2&below2&aboveUseofsoftseatedball/plug/butterflyvalvesshallbesuitablyselectedbasedontemperatureshandled.Butterflyvalvesshallbesuitableforthrottlingapplication.UseofFiresafevalvesshallbeasperProcessrequirement.ForProcess(Hydrocarbon)servicesbutterflyvalveshallbetripleoffset,highperformancetype.

2.5Strainer

Allowablepressuredropwhenspecifiedshallbecertifiedalongwith theoffer. Ifaskedspecifically,pressuredropcalculationsshallbefurnished.

All2&highersizedYtypestrainersshallbeprovidedwith3/4threadedtapandsolidthreaded plug as drain connection on the blind flange. For less than 2, this shall be1/2size.

BottomflangeofYtypestrainershallnothavetappedhole.Fulllengthstandardsizestudsshallbeusedforjoiningblindflange.Forfabricatedstrainers,allBWjointsshallbefullyradiographedandfilletweldsshallbe100%DP/MPchecked.Allthestrainersshallbehydrostaticallytestedattwicethedesignpressure.

2.6Traps

Vendor shall furnish the performance curve indicating the capacity in mass/hour atvariousdifferentialpressuresacrossthetrap.




Rev.A

Partssubjecttowearandtearshallbesuitablyhardened.Trapsshallfunctioninhorizontalaswellasinverticalinstallation.Trapsshallhaveintegralstrainers.Alltrapsshallbehydrostaticallytestedtotwicethedesignpressure.

2.7Hoses

Suitabilityofhosesshallbeguaranteedfortheserviceandworkingconditionsspecifiedintherequisition,evenifthematerialisnotspecifiedintheMaterialRequisitionforanyparticularservice.Allhosesshallbeclearlymarkedwithserviceandworkingpressureatbothends.Hosesshallberesistanttoageing,abrasionandsuitableforoutdoorinstallations.CompleteHoseassemblyshallbetestedattwotimesthedesignpressure.Steamhosesshallbesubjecttosteamresistancetest.

2.8ExpansionJoints

The applicable codes are ASME B31.3 and EJMA (Expansion Joint ManufacturersAssociation).

Bellows shall be formed from solution annealed sheet conforming to the latestASTMSpec.Anylongitudinalweldshallbe100%radiographed.Thefinishedlongitudinalweldmust be of the same thickness and same surface finish as the parent material.Circumferential welds are not permitted. Bellows are to be hydraulically orexpansion(punched)formed.Rolledformedbellowsarenotacceptable.Noticeablepunchordiemarksresultingfromexpansionoperationarenotacceptable.

Norepairsofanykindareallowedonthebellowsafterforming.Deepscratchesanddentsarenotacceptable.




Rev.A

Theoutofroundnessshallbe limited to3mm.This is themax.deviationbetween themax.&min.diameter.

The actual circumference of the welding end shall be maintained to 3mm of thetheoreticalcircumference.

Apartfromtheusualrequirements,thevendorshallalsofurnish:

Designcalculationstojustifystiffnessandfatiguelife.Axial,lateralstiffness,angularstiffness,effectivepressurethrustarea.Installation/maintenancemanual.Moments&forcesduetostiffness&pressurethrustduetoexpansionjoint

2.9Supports&SpringAssemblies

TheMaterial,Design,ManufactureandFabricationshallbegenerallyasperMSSSP58/MSSSP89and/orBS3974.TestingofspringsshallbeasperBS1726.

2.10Gaskets

Asbestosfillerforspiralwoundgasketshallnothaveanycolourordye

Fullfacegasketsshallhaveboltholespunchedout.

NonmetallicringgasketsasperASME/ANSIB16.21shallmatchflangestoASME/ANSI

B16.5 upto 24, and ASME/ANSI B16.47 or AWWA for sizes > 24 unless otherwisespecified.

SpiralwoundgasketsasperASMEB16.20shallmatchflangestoASME/ANSIB16.5upto24,andASMEB16.47seriesBforsizes>24unlessotherwisespecified.

InnerandouterringsrequirementforspiralwoundgasketsshallbeasperPMSGeneralnotes.

Innerringshallbeprovidedforthefollowing:

a)Aspercode(B16.20)requirement.

b)Forsizes26&aboveinallclasses.

c)Forvacuum,cryoandhydrogenservice.




Rev.A

d)ForSS321,SS347andHgradeSSclasses.

e)Forclasseswheretemperatureishigherthan427C.

f)For900#ratingandaboveclasses.(IfPMSspecifiesspiralwoundgasket)

IncaseofRTJgaskets,onlyoctagonalsectionringgasketsshallbeused&shallhavepropermarkingstamped.Materialcertificateshallbeavailableforthegasket.HardnessofRTJgasketsshallbe20BHN(min)lessthanthecorrespondingflangegroovehardness.

2.11Stud,Bolts,NutsandJackScrews

AllboltingshallbeasperASME/ANSIB18.2.1forStuds,M/CBoltsandJackscrews,andASME/ANSIB18.2.2fornuts.

Threadsshallbeunified(UNCfor1diaand8UNfor>1dia)asperANSIB1.1withclass2AfitforStuds,M/CBoltsandjackscrews,andclass2Bfitfornuts.

Studboltsshallbethreadedfulllengthwithtwoheavyhexnuts.LengthtoleranceshallbeinaccordancewiththerequirementoftableF2ofAnnexureFofASMEB16.5

Thenuts shall bedouble chamfered, semifinished,heavyhexagonal type and shall bemadebythehotforgedprocess.

Thelengthofthestuds/boltsshouldbesuchthatminimumtwothreadsshouldbeoutofthenutoneitherside.

Allthestud/boltshouldhavemetallurgicalcertificatesincaseofalloy/SSmetallurgywithidentifiedcolourmarkingatthestudends/boltsideface.

HeadsofjackscrewsandM/Cboltsshallbeheavyhexagonaltype.Jackscrewendshallberounded.

Whereverbolttensioningisspecifiedstudboltlengthshallbelongerbyminimumonediametertosuitbolttensioner.Excessthreadsshallbeprotectedbyathreadednut.

2.0 Inspection&testingAllitemsandtheirpartsshallbesubjectedtoallmandatoryaswellassupplementary(whereverspecified)testsandcheckscalledforintherespectivecodes/standards/datasheets.




Rev.A

Theexaminingpersonnelshallhavetherequisitequalificationandexperience.Clientanditsauthorizedrepresentativereservetherighttovetandsuggestchangesinvendorsprocedures.VendorsworksandfacilitiesshallbeaccessibletotheClient/Representativeatallreasonabletimes.Testreportsforallmandatoryaswellassupplementarytestswhereverspecifiedshallbefurnished.PositivematerialidentificationtestatvendorsworksshallbedoneasperStandardspecificationforpositivematerialidentificationPMIatvendorsworks,6810001.

4.0Marking

Allitemsshallbemarked(stamped/etched)inaccordancewiththeapplicablecode/standard/specification.Inaddition,theitemcode,ifavailable,shallalsobemarked.Foreaseofidentification,thecolourofpaintedstrip(whereverrequired)shallbeaspertheapplicablestandard.Paintorinkformarkingshallnotcontainanyharmfulmetalormetalsaltswhichcancausecorrosiveattackeitherordinarilyorinservice.Specialitems/smalleritemsshallhaveattachedcorrosionresistanttagprovidingsalientfeatures.

5.0Despatch

Allitemsshallbedry,cleanandfreefrommoisture,dirtandlooseforeignmaterialofallkinds.

Allitemsshallbeprotectedfromrust,corrosion,andmechanicaldamageduringtransportation,shipmentandstorage.

Rustpreventiveonmachinedsurfacestobeweldedshallnotbeharmfultoweldingandshallbeeasilyremovablewithapetroleumsolvent.




Rev.A

Endsshallbesuitablyprotected,andtheprotectorsshallbesecurelyandtightly

attached. Eachvarietyandsizeofitemshallbesuppliedinseparatepackagingmarked

withthepurchaseorderno.,itemcode(ifavailable),andthesalientspecifications.

Carbonsteel,LTCSandlowalloysteelvalvesshallbepaintedwithonecoatofinorganiczincsilicateprimer.




Rev.A

AnnexureECLEARANCESOVERHEADCLEARANCES

Equipment,structure,platforms,piping&itssupportsshallbearrangedtoprovidethefollowingclearancesoverhead:Overrailroads,topofrailtobottomofanyobstruction.7mOverplantroadsformajormobileequipment.7mOversecondaryroads(bottomofpipe)andaccess5mwaysformobileequipment.Overgrade&bottomofpipe(insidebatterylimit)3.5matpumprowaccessway.Overwalkways,passways&platformstonearest2.2mobstructionandinsidebuilding.Overexchangersatgrade,shellcoverchannelend.1.5mHORIZONTALCLEARANCES:Betweenexchangers(aislesbetweenpiping).0.9mAroundpumps(aislesbetweenpiping).0.9mFiredheaterstopumpshandlingflammablestock.15mFiredheaterstootherflammablecontaining15mequipmentnotcloselyassociatedwithheaters.Atdriverendofpumps,wheretruckaccessreqd3.0m




Rev.A

Atdriverendofpumps,wheretruckaccessnotreqd1.8mAtshellcoverendofexchangersatgrade,1.3mforaccessway.Betweenshellsofadjacenthorizontalvessels.1.2m PIPEBERTHING: Underground300mmminimumcleargapbetweenpipesAbovegroundNormalFlangetobarepipe(orinsulation)plus25mmEQUIPMENTSPACING: SmallpumpsMountedoncommonfoundationswith(3.7kw&less)suitablecentretocentredistance.Mediumpumps900mmclearaisle(22.5kw&less)Largerpumps900mmclearaisle(above22.5kw)Exchangers&900mmminimumclearaisleotherequipmentonstructures PLATFORMS:Towers,vertical&horizontalvessels:Distanceofplatformbelowcentrelineof9001050mmmanholeflangesideplatformWidthofmanholeplatformfrommanhole900mm




Rev.A

covertooutsideedgeofplatformPlatformextensionbeyondcentrelineofmanhole900mmsideplatformDistanceofplatformbelowundersideofflange175mmheadplatformWidthofplatformfromthreesidesofmanhole750mmheadplatform

Untitled

piping design basis (6724-700-50-43-db-0016)_rev.a

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