ProposalonCarbonSteelPipeWelding碳钢管道焊接工艺1Technicaldescription技术特征1.1Pipematerialandsize:20#seamlesssteelpipe材质、规格：20#无缝钢管1.2Workmedium：water工作介质：水1.3Designedpressure：4kg/cm2设计压力：4kg/cm21.4Workpressure：4k/m2工作压力：4k/m21.5Testpressure：6k/m2试验压力：6k/m22Relateddocumentstothisproposal：本工艺编制依据：2.1TechnicalspecificationofF06BF06B技术文件2.2GB50236-98《FieldEquipmentandIndustrialPipeWeldingWorkExecutionandAcceptanceCode》国标GB50236-98《现场设备、工业管道焊接工程施工及验收规范》2.3GB50235-97《国标GB50235-97《工业金属管道工程施工及验收规范》4.2Inspectthepipematerialsandweldingmaterialsinaccordancewiththerelevantrulesandsigntheacceptanceform。对管材焊材按规定进行检验、填表验收。4.3Supervisetheworkofwelderandhelphimtocorrectanydefectsinwork.Toensuretheweldingworkquality,theinspectorispoweredtostoptheworkofanyseriousoffenderorthosewhorefusetocorrectdefectsinwork。对焊工是否执行本工艺进行全面监督检查对违反者进行教育帮助得以改正。对严重违反者或教育不改者有权令其停止焊接工作。以确保焊接质量。PerformtheinspectionofweldedworkinlinewithArticle7ofthisproposal做好本工艺第条“焊接后检查和管理工作”CoordinatewiththerepresentativesofContractorandSupervisortoparticipatetheinspection邀请和欢迎总包或监理方检验人员进行检查。5Preparationworkbeforewelding：焊前准备：5.1Thepipematerialsandweldingmaterialsarecheckedtobequalifiedproducts管材焊材必须具有符合规定的合格证明，并与实物核对无误。Pipematerialandsize:20#seamlesssteelpipe管材型号为无缝钢管，规格为至Weldingmaterials焊材Argonweldingwiremodelandsize:CO2wire,#2.5mm#2.0mm氩弧焊焊丝型号规格：保护焊焊丝，少#Weldingrodmodelandsize:J422#3.2mm#2.5mm电焊条规格型号规格：##Cetungstenpolemodelandsize:WCe-20#2.0mm铈钨极型号规格：fArgonpurity:99.99%。氩气纯度为％。Weldingpartspreparation焊件准备ThepositioningofweldingpointshouldcomplytoGB50235-97andGB50236-98。焊接口的分布位置必须符合国标和规范的规定。ThepositioningofweldingpointshouldcomplytoGB50235-97andGB50236-98。管道为型坡口，对接接头、组对应符合图要求:Note:Theclearanceof3.5~4mmisforwelding.Whenmakingspotwelding,theclearanceshouldbebigger注：间隙〜为焊接时的数据，组对点固焊时，应适当大于此数据，以补收缩。图焊口组对数据Thegrooveofweldingpartsshouldbeprocessedbygrindingmachineandcleanedwithin10mmofbothinsideandoutsidesurfacefromanyoil,dustandburr焊件坡口应用机械或磨光机加工。焊口组对前应将坡口及其内外表面范围内的油、垢、毛刺等清理干净。Penetrationweldingmustbeappliedinspotweldand4spotswith5mmofeachshouldbeweldedonpipewithdiameterW150mmand6spotswith5mmofeachshouldbeweldedonpipewithdiameter〉150mm.点固焊，根部必须焊透。不得有焊接缺陷。管径W为点，每点长度为。管径〉为点，每点长度为。Theconnectionofpipeshouldkeepstraightinaxelandifnecessary,makemeasurementastheflowingchartfrom200mmtothecenterofweldingpoint.Thedifferentialallowanceis1mmtopipewithdiameterV100mmand2mmtopipewithdiameter上100mm.Thedifferentialallowancetothefulllengthofpipeshouldbewithin10mmandifexceedingthatrate,coldcorrectionshouldbeappliedinsteadofhotcorrection.。管子组对焊口时应保持其轴线平直。在不得以时，距焊口中心处测量平直度如图所示，管径V时允许偏差为；管径上时允许偏差为，但全长允许偏差均不大于。万一超差时，只能用冷矫正，严禁加热矫正。图管道对口平直度Thepipesinsidewallshouldkeepsmoothwhenmakingpipesjoint.Thedifferentialallowanceshouldbewithin10%ofthethicknessofpipewall.Thenonpenetratedweldi...
