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壓力管道2壓力管道材料部分(Pressurepiping2pressurepiping
materialpart)
Pressurepiping2pressurepipingmaterialpart.Txtwhenyou
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stayingyoungishavingarestlessheart.Itisnotthequality
oflifethatdetermineswhattastes,butthequalitythat
determineswhatlifeis.Thisarticleiscontributedbyhnzb87
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Thirty-six
Abstract:theselectionprocedureandprincipleofsteelpipe
forlongdistanceoilandgaspipelineareintroduced.
Accordingtothemediumthroughput,pipediameter,design
pressureandnaturalconditionsandotherfactors,combined
withtheadvantagesanddisadvantagesofseveralcommonpipes,
determinethepipetype;selectthegrade,shouldconsiderthe
solderability,weldingprocess,wallthicknessroundnessand
minimumwallthicknessetc..Keywords:longdistancepipeline;
pipetype;steelgrade;design
Whenselectinganddesigningthesteelpipeforlongdistance
oilandgaspipeline,thediameterandpressureofthesteel
pipeshouldbedeterminedaccordingtotheuser'sdata,andthen
thedesignandselectionofthesteelpipecanbecarriedout
accordingtotheprincipleoftheselectionofthesteelpipe.
Theselectionprocedureisusuallytoselectthetubetype,then
todeterminethesteellevel,andtooptimizethedesignasmuch
aspossible.
1proceduresandprinciplesofsteelpipeselection
Theprogramisthefirstgeneralsteelpipelineisexpected
accordingtothetransmissionamount,deliverypressure
(startingpointandendpointpressurepressure),thelength
ofthepipeline,alongtheelevationdataandotherparameters
throughtheprocesscalculation,optimalpipediameterand
designpressure.Onthebasisofthedeterminationofpipe
diameterandpressure,theselectionanddesignofpipe
materialsarecarriedout.Inthedesignofsteelpipeselection
principlesareasfollows:theoilandgaspipelineforhigh
pressuretransmission,ifaproblemoccurs,theconsequences
beunbearabletocontemplate,sothereliablequalityofthe
steelpipeshouldbethefirst;thedomesticsteelproduction
processandtechnologyafteryearsofdevelopment,sincethe
specificationsandtypesareverycomplete,exceptinspecial
circumstances,thedomesticsteelpipearetomeettheneedof
engineering;fordifferentprojects,duetothepipelinemedium,
thetransportationpressureandalongtheregionofdifferent
naturalconditions,selectionofsteelpipeanditstechnical
requirementstobedifferent;theselectionofsteelpipe,to
considerthedomesticproductionandsupplycapacity,inorder
tosuccessfullypurchaseneededtoensuresteaminjection
safetyundertheconditionof19MPaformaximuminjection
Theinjectionpressurecanbeloweredonthebasisofthe
injectionspeed.
Oilandgasfieldsurfaceengineering,twenty-seventhvolume,
eleventhissue(2008111)
Selectionofsteelpipesfordomesticlongdistanceoilandgas
pipelines
(DaqingOilfieldEngineeringCo.,Ltd.)JiangGuangqing
(Daqingoilfieldfirstoilproductionplant)
Lisio
Steelpipeo
2advantagesanddisadvantagesofseveralcommonlyusedsteel
tubes
Atpresent,themaintypesofsteelpipeusedinlongdistance
pipelineareseamlesssteelpipe,resistanceweldedpipe,
straightsubmergedarcweldedpipeandspiralseamsubmerged
arcweldedpipe.Allkindsofsteelpipeaccordingtoits
manufacturingprocesshasthefollowingcharacteristics:(1)
seamlesssteelpipe.Seamlesssteelpipeisthroughthecold
drawing(rolling)withoutweldsteelormadeofhotrolled,cold
drawing(rolling)tubediameteris5~200mm,thicknessof0125
-14mm;hotrolledpipediametermorethan57mmisoftenused
forhotrollingseamlesssteeltube.Comparedwithseamless
steelpipespiralseamelectricresistanceweldingsteelpipe
andsteelpipe,theinnerwallissmooth,hastheadvantages
ofhighbearingcapacity,goodcorrosionresistance,coating
qualityiseasytoguarantee;disadvantageistheovalityand
wallthicknessdeviation,highproductioncostandshorter
lengthofrootcanal.(2)resistanceweldedpipe.The
longitudinalresistanceweldingpipeisasteelpipeformedby
resistanceweldingorinductionwelding.Theweldseamis
generallynarrowandtheremainingheightissmall.Theutility
modelhastheadvantagesofsmoothweldingseam,high
dimensionalaccuracy,easyguaranteeofthequalityofthe
anticorrosivelayer,etc.thedefectisthattheweldingseam
ispronetoproducegrayspotsandgroovecorrosiondefects,
andtheweldingseamhaspoortoughness.(3)spiralseam
submergedarcweldedpipe.
Theadvantagesofspiralseamsubmergedarcweldedsteelpipe
isgoodstresscondition,anticrackability,highrigidity,
lowprice;thedisadvantageistheprobabilityofdefects,the
weldislongerthanthestraightpipe,theresidualstress
existsinsidethetube,andtheweldcoatingeasilythinned,
noteasytocontrolthequalityofmilk.(4)directsubmerged
arcweldedpipe.Theadvantagesoflongitudinalsubmergedarc
weldedpipeareshortweldlength,lessdefects,guaranteeof
weldquality,regularsizeandlittleresidualstress.The
disadvantageishighprice.For24166%,itispredictedthat
therecoveryratewillbeincreasedby12125%comparedwiththe
presentsituation.Reference
[1]ZouYanxia.Productiontechnology[M].Beijing:Petroleum
IndustryPress,2006.[2]Liuarticle.[M]technologyofheavy
oilsteaminjection.Beijing:PetroleumIndustryPress.[3]Tan
Baoguo,DaiTao,YangYaozhong,etal.Numericalsimulation
modelingtechnology[M]finereservoir.Sheng[4]LiYun.
Reservoirsimulation[M].PetroleumUniversityPress,19991
(hostZhangXiuli)[5]AnonlTertiaryoilrecoveryproject
makesCanadianoilhistory[J]1Endrgyprocessing/Canada,1985,
78(1):22-24.
3recommendedprogramdevelopmentindicators
Basedontheaboveanalysis,itisrecommendedthatthesteam
injectionparametersofBIOwellincludesteaminjection
intensityof200t/m(steaminjectionvolume:2500t),maximum
liquiddischargerateof50m,steaminjectionrateof10t/
h,andtimeofwellsoaking
Three
For5d;bottomholedrynessis015;injectionpressureis19
MPa.
Thelapseratebetweenthefirst6cyclesis37178%,andthe
lapserateisbetweenthe4posteriorperiods
104m3,therecoverydegreewas15106%,andtheinitialoil
contentwas43157m3,
Itisestimatedthatthecumulativeproductioncapacitywill
be413106x10attheendofthecycle
32飛30mmwithawallthicknessof215~75mm.Inpipeline
engineering,
Collectionofexplorationanddevelopmentinlioilprovince
(partsecond).Beijing:GeologicalPublishingHouse,1(1999.)
Selectionof3steeltubetypes
Intheselectionofpipetype,notonlythecharacteristicsof
severalcommonlyusedsteelpipetypes,butalsothe
transportationmedium,thepipediameter,thedesignpressure,
thenaturalconditionalongthewayandthepriceofsteelpipe
shouldbeconsidered.(1)conveyingmedium.Themain
transportationmediumofoilandgaspipelineiscrudeoil,
refinedoilandnaturalgas.Foroilpipelines,GB/T97111
1-1997standardsaregenerallycarriedout.BecausetheGB/
T971112andGB/T971111comparedtothechemicalcomposition,
mechanicalproperties,pipesamplingandothermorestrict
requirements;comparedwiththepipeline,oncebrokengas
pipeline,moredifficulttocrack,moredangerous,steelneed
tochoosemoresecurequality,especiallythehighpressuregas
pipelinesteelpipetotheimplementationofthestandardGB/
T971112-1997.(2)pipediameter.Affectedbythesupplyof
steelpipe,thegeneralsmallandmedium-sizedpipediameter
ismadeofseamlesssteelpipe,longitudinalresistancewelded
pipeandspiralseamsteelpipe.Largediameterpipelinesare
mainlymadeoflongitudinalsubmergedarcweldedpipeand
spiralseamsubmergedarcweldedpipe.Ingeneral,theseamless
steelpipeismainlyapplicabletotheDN200pipeline,electric
resistanceweldingsteelpipeforDN150'DN350pipe,spiral
submergedarcweldedsteelpipeforDN200pipeline,LSAWpipe
usedformorethanDN500largediameterpipeline.(3)design
pressure.Intheselectionofsteeltubes,thedesignpressure
isalsoanimportantfactor,andthehigherthedesignpressure,
thegreatertheriskofpipelines.Fortheoilpipeline,the
pipelinemaximumpressurehavebeenbuiltupto10MPa,select
theseamlesssteelpipe,straightseamweldedpipeandspiral
submergedarcweldedsteelpipe,etc.arepossible,thisaspect
alsohassuccessfulexperience,suchasthedesignpressureof
theLANChengduChongqingpipelinein10MPa,thetypesofsteel
pipeusing;
Forthegaspipeline,thedomesticconstructionofthemain
spiralweldedseamweldedsteelpipe,inthespecialareausing
longitudinalresistanceweldedsteelpipe,thedesignpressure
isbasically614~12MPa.(4)naturalconditionsalongtheroute.
LongdistanceoilandgaspipelineinChinaistoensurethe
pipelineitselfanditssurroundingsecuritybythestrength
ofthepipe,inthepeopleandbuildingscrowdedareasshould
beusedtobetterensurethequalityofthesteelwireandthe
westeastgaspipelinehaveadoptedthismode.(5)economic
factors.Steelpipebecauseofitslargeamount,inthepipeline
engineeringmaterials,equipmentcostsaccountedformorethan
half,especiallyinrecentyears,steelpricescontinuetosoar,
theproportionofinvestmentinsteelpipewillrise.Therefore,
payspecialattentiontothepriceshouldbeselectedwhenthe
steelpipe,seamlesssteelpipepricesgenerallywashigher
thanthatofweldedpipeandspiralweldedsteelpipe,welded
steelpipepricescheaperthantheotherthreekindsofsteel
pipe;LSAWpipeforitsstudents
Tube.Thegaspipelineismoreprominent,selectionofsteel
pipewithlargediameterandhighpressuregaspipeline,
consideringthecurrentsituationofChina'ssteelproduction,
domesticexpertsinlargediameter,highpressurepipeline,one
ortwoareassuitableforspiralsubmergedarcweldedsteelpipe,
thethreeorfourlevelareasshouldadopttheLSAWpipe.
DomesticbuiltloyaltyWu
Oilandgasfieldsurfaceengineering,twenty-seventhvolume,
eleventh(2008111)37
Productionlineone-timeinvestmentofuptonearly100million
U.S.dollars,althoughitsproductivityismuchhigherthan
thespiralseamsteelpipe,buttheexfactorypriceofsteel
pipeisstillhigherthanthespiralseamsteelpipe20%~30%.
(6)procurement.Accordingtothedomesticproduction
situationofsteelpipe,seamlesssteelpipeweldedsteelpipe,
mm<35516<610,mm<1426mmspiralseamsteelpipeandthe
longitudinalsubmergedarcweldingpipediameter<1016mmand
belowtheproductionperformanceofdomesticmanufacturers,
suppliershavenoproblem.
4steelpipelevelselection
Indesign,thechoiceofsteelpipelevel,generallyfirstthree
primarydifferences
Thesteelgradeiscalculatedbythewallthicknesscalculation
formulaofthesteeltube,thentheactualwallthicknessis
determinedbyrounding,andthetotalamountandthetotalcost
ofthedifferentsteelgradesarefinallycalculated.Withthe
resultofeconomiccalculationandthetechnicalcomparison,
thegradeofsteelpipeisfinallydetermined.Forsteelgrade
selection,thefollowingproblemsshouldbepaidattentionto:
(1)weldabilityofsteelpipe.Withtheincreaseofthesteel
grade,thestrengthofthesteelpipeincreases,thetoughness
decreases,andtheweldabilitybecomesworse.X42belowthe
steelgradepipe,whentheambienttemperatureishigherthan
5degrees,thescenewithoutpreheating,canbeweldedstraight;
X42steelabovepipe,weldingmustbepreheated.Ifthesteel
levelistoohigh,incoldweatherconstruction,butalsoafter
weldingheatpreservation,these
Factorsshouldalsobetakenintoaccountwhenselectingsteel
grades.(2)weldingprocess.Fordifferentsteelgrades,
differentweldingmaterialsshouldbeusedtomatch,andthe
selectionofweldingmaterialsisdirectlyrelatedtothe
weldingmethod.X70andX70belowthesteellevel,generally
usedautomaticwelding,semi-automaticweldingandmanual
welding,thedomestichasamatureweldingprocess.(3)wall
thicknessrounding.Whencalculatingthewallthicknessofthe
steeltube,thewallthicknesscalculatedforsomebigdiameter
andhighpressurepipesisoftendiffer
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