GB 50468-2008 GB50468-2008焊管工艺设计规范-英文

专用

人人文库

NATIONALSTANDARD

OFTHEPEOPLESREPUBLICOFCHINA

CodeforDesignofWeldedPipeProcess

GB50468-2008

ChiefDevelopmentDepartment:ChinaMetallurgicalConstructionAssociation

ApprovalDepartment:MinistryofHousingandUrban-RuralDevelopment

ofthePeoplesRepublicofChina

ImplementationDate:July1,2009

专用

人人文库

ChinaPlanningPress

Beijing2015

图书在版编目(CIP)数据

焊管工艺设计规范英文中国冶金建设协会组织编

GB50468-2008:/

译北京中国计划出版社

.—:,2015.12

ISBN978-7-5182-0315-4

中焊管机工艺设计设计规范中国英

Ⅰ.①G…Ⅱ.①…Ⅲ.①----

文

Ⅳ.①TG333.93-65

中国版本图书馆数据核字第号

CIP(2015)273603

ChineseeditionfirstpublishedinthePeoplesRepublicofChinain2009

EnglisheditionfirstpublishedinthePeoplesRepublicofChinain2015

byChinaPlanningPress

rd专用

3Floor,CTower,GuohongBuilding

No.A11,Muxidi-Beili,XichengDistrict

Beijing,100038

PrintedinChinabyBeijingJinghuaHucaisPrintingCO.,LTD

Ź2009byMinistryofHousingandUrban-RuralDevelopmentof

thePeoplesRepublicofChina

Allrightsreserved.Nopartofthispublicationmaybereproducedortransmittedinanyformor

byanymea人人文库ns,graphic,electronic,ormechanical,includingphotocopying,recording,

oranyinformationstorageandretrievalsystems,withoutwrittenpermissionofthepublisher.

Thisbookissoldsubjecttotheconditionthatitshallnot,bywayoftradeorotherwise,belent,

resold,hiredoutorotherwisecirculatedwithoutthepublisherspriorconsentinanyformof

blindingorcoverotherthanthatinwhichthisispublishedandwithoutasimilarcondition

includingthisconditionbeingimposedonthesubsequentpurchaser.

ISBN978-7-5182-0315-4

AnnouncementoftheMinistryofHousingandUrban-Rural

DevelopmentofthePeoplesRepublicofChina

No.166

AnnouncementonIssuingtheNationalStandard

CodeforDesignofWeldedPipeProcess

CodeforDesignofWeldedPipeProcess

isherebyapprovedasanationalstandardwitha

serialnumberofGB50468-2008,anditshallbeimplementedfromJuly1,2009.Therein,Sections

6.4.5(2)and6.4.17arecompulsoryprovisionsandmustbeenforcedstrictly.

AuthorizedbytheResearchInstituteofStandards&Norms(RISN)oftheMinistryof

HousingandUrban-RuralDevelopmentofthePeoplesRepublicofChina,thisCodeispublished

anddistributedbyChinaPlanningPress.专用

MinistryofHousingandUrban-RuralDevelopmentofthePeoplesRepublicofChina

November27,2008

人人文库

Foreword

ThiscodewasdevelopedbyCISDIEngineeringCo.,Ltd.togetherwiththeorganizations

concernedundertheorganizationofChinaMetallurgicalConstructionAssociation(CMCA)in

NoticeonPrintingandDistributingtheDevelopmentand

accordancewiththerequirementsof

RevisionPlanofEngineeringConstructionStandardsandCodesinBatch

2006(2)(JIANBIAO

[2006]No.136)issuedbytheformerMinistryofConstruction(MOC).

Duringthedraftingprocess,theCodedevelopmentteamhasmadein-depthinvestigationsand

studies.Basedontheweldedpipesproductiontechnologiesinrecentyearsandsummarizingthe

domesticprocessdesignofweldedpipes,theyhavewidelysolicitedtheopinionsandsuggestions

fromChinasweldedpipeproducers,research&designinstitutes,universities,feedstocksuppliers,

end-users,equipmentmanufacturers,industrialassociationsandexpertsinthefieldaswell.By

analyzingandstudyingthewell-provenexperiencebothathomeandabroadforyears,whiletaking

intoconsiderationtheactualsituationsoftheprojectimplementationinChina,theteammade

seriousdiscussionsandmultiplerevisionsbeforethepresentversionwasreviewedandfinalized.

,:专用,,

ThisCodecomprises12ChaptersrespectivelycoveringGeneralProvisionsTermsandSymbolsBasic

Requirements,FeedstockforProductionofWelded-Pipes,ProductionProcessesofWelded-Pipes,Equipment

SelectionforProductionofWelded-Pipes,ServiceDuty,ProductionTimeandDesignedDutyRatio,Calculation

ofProductionCapacities,ShopLayoutandDesign,ProductionTools,MainTechnical&EconomicIndicators,

andEnvironmentalProtection,LaborSafetyandIndustrialHealth.

Theprovisionsprintedinboldtypearecompulsoryonesandmustbeenforcedstrictly.

TheMinistryofHousingandUrban-RuralDevelopmentisinchargeofthegovernanceofthis

Codeandtheinterpretationofthecompulsoryprovisions;whileCISDIEngineeringCo.,Ltd.is

responsiblefortheinterpretationofthespecifictechnicalcontents.Alltheconcernedorganizations,

intheimplementationprocessofthisCode,arekindlyrequestedtobuildupexperienceanddatain

realsenseandfeedbacktheopinions,suggestionsanddata,whenevernecessary,toCISDI

EngineeringCo.,Ltd.(address:No.1,ShuanggangRoad,YuzhongDistrict,Chongqing400013,

China)forreferenceinfuturerevision.

ChiefDevelomentOranization

pg:

人人文库CISDIEngineeringCo.,Ltd.

ParticiatinDevelomentOranizations

pgpg:

CapitalEngineering&ResearchIncorporationLtd.

PanyuChuKongSteelPipeCo.,Ltd.

ZhejiangJiuliStainlessSteelPipeCo.,Ltd.

ChiefDraftinStaff

g:

ZengLiangpingMuDongZhangHaijunCaoZhiliangFengZhaotang

JiHaiLanXingchangLiuShizeHuangKejianCaoYongChenBenlun

ChenBaolinZhongJianxiongLiRuihuaWangYin

Contents

……………

1GeneralProvisions(1)

…………

2TermsandSymbols(2)

……………

3BasicRequirements(4)

…………………

4FeedstockforProductionofWeldedPipes(5)

………

5ProductionProcessesofWeldedPipes(6)

…………………

5.1ProductionProcessofHighFrequencyLongitudinalWeldedPipe(6)

…………………

5.2ProductionProcessofLongitudinalSubmerged-ArcWeldedPipes(6)

…………

5.3ProductionProcessofSpiralSubmerged-ArcWeldedPipes(6)

……

5.4ProductionProcessofStainlessSteelContinuousWeldedPipes(7)

…………………

5.5ProductionProcessofStainlessSteelDiscontinuousWeldedPipes(7)

……

6EquipmentSelectionforProductionofWeldedPipes(8)

…

6.1EquipmentSelectionforProductionofHighFrequencyLongitudinalWeldedPipes(8)

……

6.2EquipmentSelectionforProductionofLongitudinalSubmerged-ArcWeldedPipes(11)

…………

6.3EquipmentSelectionforProductionofSpiralSubmerged-ArcWeldedPipes专用()

12

……

6.4EquipmentSelectionforProductionofStainlessSteelContinuousWeldedPipes(13)

……

6.5EquipmentSelectionforProductionofStainlessSteelDiscontinuousWeldedPipes(15)

…………………

7ServiceDuty,ProductionTimeandDesignedDutyRatio(16)

………

8CalculationofProductionCapacities(17)

……………………

9ShopLayoutandDesign(18)

……………

10ProductionTools(19)

……………………

11MainTechnical&EconomicIndicators(20)

…………

12EnvironmentalProtection,LaborSafetyandIndustrialHealth(21)

…………

ExplanationsofWordinginthisCode(22)

人人文库

1GeneralProvisions

1.0.1

ThisCodeisformulatednotonlytostandardizetheprocessdesignofwelded-pipemillsets

andassurethequalityofprocessdesignconcerned,butalsotopromotetheadvancementin

technologicalprocess,equipmentoutfitofthewelded-pipemillsetsandtheproductiontechnologies

forweldedpipes.

1.0.2

ThisCodeisapplicabletotheprocessdesignofconstruction,modernizationandexpansion

projectsofmillsetsforproductionoflongitudinalhigh-frequencylongitudinalweldedpipes,

longitudinalsubmerged-arcweldedpipes,spiralsubmerged-arcweldedpipes,andindustrial

stainlesssteelweldedpipes.

1.0.3

Thewelded-pipemillsetstobeconstructed,modernizedorexpandedshallconformtothe

nationalindustrialpolicyandmeettherequirementsforhighqualityandefficiency,low

consumption,andenvironmentalprotection.

1.0.4

Theprocessdesignofthewelded-pipemillsshallcomplywithnotonlythisCode,butalso

therequirementsspecifiedintherelevantnationalstandardsinforce专用.

人人文库

·1·

2TermsandSymbols

2.0.1

SpotWelding

Itsaweldingprocessinwhichelectricarcisusedastheheatingsourcetomeltdownthe

weldingjointofawork-piecetoformspot-likeordiscontinuouswelds.

2.0.2

HighFrequencyLongitudinalWeldedPipe

Itsapipewithalongitudinalseamweldedbyhighfrequencyweldingprocessoverthelength

ofthepipebody.

2.0.3

PipeEndTreating

Itreferstothenon-plasticdeformationprocessingonthepipeendstoprovidetheplainpipe

withendsasrequiredfromtheproductstandards.Itincludespipeenddefectremoval,flash

trimming,dressing,bevelingandthelike.However,itdoesnotincludeendupsetting,sizing,

threading,couplingandsoon.

2.0.4

WeldedPipe

Itsapipemadeofsteelsheetorstripwhichisbenttohaveatu专用bularform,withalongitudinal

orspiralseamweldedoverthefulllengthofthepipebody.

2.0.5

MillSet

Itsacollectionoftheprocessequipmenttoproducetheproductsinthemix,coveringthe

processoffeedstockpreparationdownstreamtothefinalproductstorage.

2.0.6

AnnualScheduledOperationTimeofMillSet

Itstheyearlycalendartimedeductingthetimerequiredformajor,mediumandminor

maintenanceandnormalshiftchange-oversofthemillset.

2.0.7

AnnualAvailableProductionTimeofMillSet

Itstheannualscheduledoperationtimedeductingthetimerequiredforchangingtherolls,

toolsandspecificationsandshutdownofthemillset.

2.0.8

AnnualNecessaryProductionTimeofMillSet

Itstheactualtimerequiredforthemillsettoachievetheannualoutputasspecifiedinproduct

mix.

2.0.9

DutyRatioofMillSet

Itstheratioo人人文库ftheannualnecessaryproductiontimetotheannualavailableproductiontimeof

themillset.

2.0.10

WeightRatioofPlateorStriptoProduct

Itstheratiobetweentheweightoftheconsumedplateorstripforproductionoftheproducts

ofallthesizesspecifiedintheproductmixandthetotalweightoftheproductsbythemillset.

2.0.11

Offline

Itsoneoftheoperationmodesinwhichawork-piece(includingfeedstockandsemi-finished

pipes)cannotbemovedfromtheproductionlineoftheweldedpipesincontinuousoperationtoa

certainsequenceofthelineorviceversawithoutthehelpofhoistingandtransportationequipment

orbyhand.

·2·

2.0.12

SpiralSubmerged-arcWeldedPipe

Itsapipewithaspiralseamweldedbysubmerged-arcweldingprocessoverthepipebody.

2.0.13

ManualInspection

Itsaprocessinwhichtheinnerandoutersurfacequality,shapeanddimensionofawelded

pipeareinspectedbyeyesorsimpletoolslikelow-poweramplifier,endoscope,gauges,etc.

2.0.14

Online/Inline

Itsoneoftheoperationmodesinwhichawork-piece(includingfeedstockandsemi-finished

pipes)canbemovedfromtheproductionlineoftheweldedpipesincontinuousoperationtoa

certainsequenceofthelineorviceversaevenwithoutthehelpofhoistingandtransportation

equipmentorbyhand.

2.0.15

LongitudinalSubmerged-arcWeldedPipe

Itsapipewithalongitudinalseamweldedbysubmerged-arcweldingprocessoverthepipe

body.

2.0.16

AutomaticButtWelder

Itsawelderwhichcanautomaticallyperformbuttweldingontheheadandtailendsofthe

stripexceptitsparametersetupandstart/stop.

2.0.17

AutomaticInsideFlashTrimmer

Itsadevicewhichcanautomaticallytrimofftheflashesfromtheinsidefaceofthewelds

/专用

exceptitsstartstopandadjustment.

2.0.18

AutomaticOutsideFlashTrimmer

Itsadevicewhichcanautomaticallytrimofftheflashesfromtheoutsidesurfaceofwelds

exceptitsstart/stopandadjustment.

2.0.19

AutomaticSubmerged-ArcWelder

Itsawelderwhichcanautomaticallyperformsubmerged-arcweldingexceptitsparameter

setupandstart/stop.

2.0.20

AutomaticGasShielded-ArcWelder

Itsawelderwhichcanautomaticallyperformthegasshieldedarcweldingexceptitsparameter

setupandstart/stop.

人人文库

·3·

3BasicRequirements

3.0.1

Thespecificationsofmillsetsforproducinghighfrequencylongitudinalweldedpipe

(ERW),spiralsubmerged-arcweldedpipe(SSAW)andstainlesssteelcontinuousweldedpipe

(EFW)shouldbeselectedonthebasisofTable3.0.1.

Table3.0.1SpecificationsofMillSetsforProductionofERW,SSAWandEFWPipes

ERWSSAWEFW

CodeofDia.RangeofCodeofDia.RangeofCodeofDia.Rangeof

MillSetWeldedPipe(mm)MillSetWeldedPipe(mm)MillSetWeldedPipe(mm)

#4214-42#508219-508#258-25

#6020-60#720325-720#6321-63

#7625-76#920406-920#7625-76

#11433-114#1220406-1220#8932-89

#16860-168#1420508-1420#11438-114

#21973-219#2030720-2030#16860-168

#27390-273#2540760-2540专用#21989-219

#325114-325#28501,200-2850#325114-325

#406140-406#30501,420-3050#406140-406

#508168-508--#508168-508

#610219-610--#610219-610

Note:ERWintheaboveTable3.0.1referstothemillsetforproductionofhighfrequencylongitudinalweldedpipes,SSAWthemill

setforproductionofspiralsubmerged-arcweldedpipes,andEFWthemillsetforproductionofstainlesssteelcontinuouswelded

pipes.

3.0.2

Themillsetforproductionoflongitudinalsubmerged-arcweldedpipesshouldbeinstalled

nearbythewide/heavyplatemillsetwheresupplyoffeedstockisguaranteed.

人人文库

·4·

4FeedstockforProductionofWeldedPipes

4.0.1

Themillsetsforproductionofhighfrequencylongitudinalweldedpipesspiralsubmerged-

arcweldedpipesshouldusestripcoilsasthefeedstock.Themillsetforproductionoflongitudinal

submerged-arcweldedpipesshouldusethesinglecut-to-lengthsheetsasthefeedstock.Andthe

millsetforproductionofstainlesssteelcontinuousweldedpipesshallusethestripcoilsasthe

feedstock,themillsetforproductionofstainlesssteeldiscontinuousweldedpipesshouldusethe

singlecut-to-lengthsheetsasthefeedstock.

4.0.2

Themillsetsforproductionofhighfrequencylongitudinalweldedpipes,spiralsubmerged-

arcweldedpipesandstainlesssteelcontinuousweldedpipesshouldusetheheavyorslitstripcoilsas

thefeedstock.ForERWandSSAW,theweightperunitwidthofthehot-rolledstripcoilsshould

notbelessthan16kg/mm,andthatofthecold-rolledstripcoilshouldnotbelessthan8kg/mm.For

EFW,theweightperunitwidthofthehot-rolledstripcoilsshouldnotbelessthan10kg/mmand

thatofthecold-rolledstripcoilsshouldnotbelessthan8kg/mm.

4.0.3

Thestripcoilsusedasthefeedstockforweldedpipemill专用setsshouldbeof762mmor

508mmininnerdiameter.

人人文库

·5·

5ProductionProcessesofWeldedPipes

5.1ProductionProcessofHighFrequencyLongitudinalWeldedPipe

5.1.1

Theproductionofhighfrequencylongitudinalweldedpipesshallinvolvesuchworkingprocedures

asstrippreparation,formingandwelding,welddressing,sizingandcutting,andpipefinishing.

5.1.2strippreparation

Theprocedureshallincludethestepsofcoilcharging,uncoiling,

leveling,cropping,splicing,edgemachining,andstripflawdetection.Otherstepsmaybeaddedduly

whenrequiredfromthespecificproductmix.

5.1.3formingandwelding

Theprocedureshallcomprisebothstepsofformingandwelding.

5.1.4welddressing

Theprocedureshallincludethestepsofinsideandoutsideflashtrimming,

ultrasonicdetectionafterformingandwelding,onlineweldheattreatment,andweldcooling.

5.1.5sizingandcutting

Theprocedureshallincludethestepsofsizingandstraightening,and

cuttingtolength.

5.1.6pipefinishing

Theprocedureshallincludethestepsofsampling,pipeendtreating,inside

cleaning,hydrostatictesting,flawdetection,manualinspection,mar专用kingandproductcollection.

Otherstepsmaybeaddeddulywhenrequiredfromthespecificproductmix.

5.2ProductionProcessofLongitudinalSubmerged-ArcWeldedPipes

5.2.1

Theproductionoflongitudinalsubmerged-arcweldedpipesshallinvolvesuchworking

proceduresassheet/platepreparation,weldingofarcstriking/quenchingstrip,edgemachining,

forming,pre-welding,insideandoutsidewelding,weldflawdetection,expanding,hydrostatic

testing,post-testwelddetection,flatendchamfering,bevelenddetection,manualinspection,

weighing/lengthmeasuring/marking,andproductcollection.Otherproceduresmaybeaddedduly

whenrequiredfromthespecificproductmix.

5.2.2

Sheets/platestobeusedasthefeedstockfortheweldedpipemillsetsshallbequalifiedin

thenon-destructivetest(NDTforshort).Onlyifthesheets/platesaresuppliedwithcertificatesof

NDT,maytheNDTprocedurebeneglectedinthemillsets.

5.2.3arcstrikingquenchingedgeprocessing

The/procedureshouldbebeforetheprocedure.

5.2.4sheetplateedgepre-bending

The/procedureshouldbebeforethemainformingprocedure.

5.2.5pre-welding

Inthe人人文库procedure,continuousweldingshallapplyinsteadofspotwelding.

5.3ProductionProcessofSpiralSubmerged-ArcWeldedPipes

5.3.1

Theproductionofspiralsubmerged-arcweldedpipesshallinvolvesuchworkingproceduresas

strippreparation,formingandwelding,andpipefinishing.

5.3.2strippreparation

Theprocedureshallincludethestepsofcoilcharging,uncoiling,leveling,crop

stripflawdetection

cutting,splicing,andedgemachining.Theproceduremaybeaddeddulyaccordingtothe

processrequirements.

5.3.3formingandwelding

Theprocedureshallincludethestepsofforming,welding,andsizing

andcutting.Theweldingcanberealizedbyonlineinsideweldingandoutsideweldingprocess,orby

·6·

onlinepre-weldingplusonlineinsideandoutsideweldingprocess,orevenbyonlinepre-welding

plusofflineinsideweldingandoutsideweldingprocess.

5.3.4pipefinishing

Theprocedureshallincludethestepsofweldrepair,pipeendtreating,inside

cleaning,sampling,weldNDT,manualinspection,weighing/measuring/marking,andproductcollection.

Otherstepslikeendsizing,hydrostatictestingandbodyflawdetectionmaybeaddeddulywhenrequired

fromthespecificproductmix.

5.4ProductionProcessofStainlessSteelContinuousWeldedPipes

5.4.1

Theproductionofstainlesssteelcontinuousweldedpipesshallinvolvesuchworkingprocedures

asstrippreparation,formingandwelding,welddressing,sizingandcutting,andpipefinishing.

5.4.2strippreparation

Theprocedureshallincludethestepsofcoilcharging,uncoiling,leveling,crop

cutting,buttwelding,looperstorage,andstripcleaning.

5.4.3formingandwelding

Theprocedureshallincludebothstepsofformingand(insideandoutside)

welding.

5.4.4welddressing

Theprocedureshallincludethestepsofinsideexcessweldmetalremoval,outside

excessweldmetalremoval,andcoldweldmachining.

5.4.5sizingandcutting

Theprocedureshallincludethestepsofonlinesizing,straightening,NDT,

diametermeasurement,andcuttingtolength.

5.4.6pipefinishing

Theprocedureshallincludethestepsofsamp专用ling,pipeendtreating,manual

inspection,hydrostatictesting,NDT,markingandproductpacking.Incaseofnon-brightheat

treatment,picklingpassivationstepshallbeaddeddulyinthisprocedure.

5.4.7

Theproductionofstainlesssteelcontinuousweldedpipesshallinvolvesuchworkingproceduresas

weldedpipecleaningandheattreatment,onlineoroffline;inparticular,theonlinecleaningandheat

treatmentshallbedownstreamtheprocedureofsizing.Formillsetsof#76orsmallerforproductionof

austeniticstainlesssteelweldedpipes,brightheattreatmentprocessshouldapply.

5.4.8

However,hydrochloricacidpicklingprocessshallnotapplyforproductionofausteniticstainless

steelweldedpipes.

5.4.9

Otherproceduresmaybeaddeddulywhenrequiredfromthespecificproductmix.

5.5ProductionProcessofStainlessSteelDiscontinuousWeldedPipes

5.5.1

Theproductionofstainlesssteeldiscontinuousweldedpipesshallinvolvesuchworking

proceduresassheet/platepreparation,cuttingtolength,arcstriking/quenchingwelding,edge

machining,forming,pre-welding,welding,pipeendtreating,heattreatment,picklingpassivation,

straightening,hydr人人文库ostatictesting,weldNDT,manualinspection,weighing/measuring/marking,and

productpacking.WhenRBformingprocessisapplied,aroundingprocedureshallbearranged

welding

downstreamtheprocedure.

5.5.2

Sheets/platestobeusedasthefeedstockfortheweldedpipemillsetsshallbequalifiedin

thenon-destructivetest(NDTforshort).Onlyifthesheets/platesaresuppliedwithcertificatesof

NDT,maytheNDTprocedurebeneglectedinthemillsets.

5.5.3sheetplateedgepre-bending

The/procedureshouldbebeforethemainformingprocedure.

5.5.4

Hydrochloricacidpicklingprocessshallnotapplyforproductionofausteniticstainlesssteel

weldedpipes.

5.5.5

Otherproceduresmaybeaddeddulywhenrequiredfromthespecificproductmix.

·7·

6EquipmentSelectionforProductionofWeldedPipes

6.1EquipmentSelectionforProductionofHighFrequencyLongitudinalWeldedPipes

6.1.1

Themillsetsforproductionofhighfrequencylongitudinalweldedpipesshallbeequipped

withbasicautomationcontrolsystemforthewholeline.

6.1.2coilcharging

Intheprocedurecoilpreparationequipmentshallbeprovided,withfunctions

ofautomaticcoilpositioningandcoilcenterlevelpositioning.

6.1.3uncoiling

Equipmentselectionfortheprocedureshallbemadeasfollows:

1

Mechanicalorhydraulicuncoilershallbeinstalled.

2

Theuncoilershallhavetailformingfunction,andshouldbeequippedwithstripallowance

detectorandalignmentdevices.

3

Theuncoilershallhavetensioningfunction,andthetensioningforceshallbeadequateto

keepacoilfrombecomingloosewhenthestripheadentersthelevelerorlooper.

4

Theuncoilershallnotcauseanyscratchonthesurfaceofthestrip.

6.1.4leveling

Intheprocedure,arollerlevelershallbeprovided,withfive(5)rollersormore.

6.1.5head-tailcutter专用

Intheprocedure,acuttershallbeprovidedtocutoffthestripheadandtail

endsandstripalignmentdevicesshallbeinstalledinfrontofandbehindthecutter.

6.1.6splicing

Theproceduremaybeimplementedbyeitherbuttweldingpluslooperorhead-to-

tailjoining.Incaseofsplicingbybuttweldingpluslooperequipmentselectionshallbemadeas

follows:

1

Automaticbuttweldershallbeadoptedtoperformbuttweldingofstripheadandtailends,

andshouldbeprovidedwithshieldinggas.

2

Thestripstoredinthel