sh35012002石油化工有毒可燃介质管道工程施工及验收规范双语版

备案号J2492003SH中华人民共和国石油化工行业标准STANDARDFORPETROCHEMICALINDUSTRYOFPRCSH35012002代替SH35012001SH35012002ASUBSTITUTEVERSIONOFSH35012001石油化工有毒、可燃介质管道工程施工及验收规范SPECIFICATIONFORCONSTRUCTIONANDACCEPTANCEOFHYPERTOXICANDCOMBUSTIBLEMEDIUMPIPINGENGINEERINGINPETROCHEMICALINDUSTRYCHINESELANGUAGEISTHE“ORIGINAL“LANGUAGEANDIFINCONSISTENCIESEXISTBETWEENENGLISHANDCHINESEVERSIONS,THECHINESEVERSIONTAKESPRECEDENCEANDTHECHINESEVERSIONISTHELEGALLYBINDINGVERSION原本以中文书就，如果英文和中文版本之间存在不一致，以中文版本为准，中文版本具有法律约束力。20030209发布20030501实施国家经济贸易委员会发布ISSUEDONFEB9,2003IMPLEMENTEDONMAY1,2003ISSUEDBYSTATEECONOMYOTHERWISE,ADDITIONALTESTSHALLBEDONEACCORDINGTOGB4159517凡按规定作抽样检查或检验的样品中，若有一件不合格，必须按原规定数加倍抽检，若仍有不合格，则该批管道组成件不得使用，并应作好标识和隔离。517IFONEOFSAMPLESISUNQUALIFIEDDURINGSAMPLINGINSPECTION,CERTAINAMOUNTSPECIFIEDINTHESPECIFICATIONOFPRODUCTSSHALLBEINSPECTEDIFTHERESTILLISUNQUALIFIEDPRODUCT,THEBATCHOFPRODUCTSCANTBEUSEDANDTHEYSHALLBEMARKEDANDSEPARATEDWITHOTHERPRODUCTS518管道组成件应分区存放，且不锈钢管道组成件不得与非合金钢、低合金钢接触。518CONSTITUENTELEMENTSOFPIPELINESHALLBESTACKEDBYAREASCONSTITUENTELEMENTSOFSTAINLESSSTEELPIPELINECANTCONTACTNONALLOYEDSTEELANDLOWALLOYSTEEL52管子检验INSPECTIONOFPIPE521输送有毒、可燃介质的管子，使用前应按设计文件要求核对管子的规格、数量和标识。521SPECIFICATION,QUANTITYANDMARKOFPIPECONVEYINGHYPERTOXICANDCOMBUSTIBLEMEDIUMSHALLBECHECKEDACCORDINGTOTHEDESIGNDOCUMENT522管子的质量证明文件应包括以下内容522CERTIFICATEOFQUALIFICATIONOFPIPESHALLCONTAINFOLLOWINGCONTENTSA产品标准号；APRODUCTSTANDARDNUMBEROFPRODUCTB钢的牌号；BBRANDOFSTEELC炉罐号、批号、交货状态、重量和件数；CSTOVENUMBER,LOTNUMBER,DELIVERYSTATE,WEIGHTANDNUMBEROFPACKAGESD品种名称、规格及质量等级；DNAME,SPECIFICATIONANDQUALITYLEVELOFVARIETYE产品标准和订货合同中规定的各项检验结果；ERESULTSOFALLINSPECTIONSSPECIFIEDINPRODUCTSTANDARDANDCONTRACTF制造厂检验印记。FINSPECTIONSTAMPOFMANUFACTURER523若到货管子钢的牌号、炉罐号、批号、交货状态与质量证明文件不符，该批管子不得使用。523IFBRAND,STOVENUMBER,LOTNUMBERANDDELIVERYSTATEOFPIPESTEELDONTCONFORMTOCERTIFICATEOFQUALIFICATION,THEBATCHOFPIPESCANTBEUSED524有耐晶间腐蚀要求的材料，产品质量证明文件应注明晶间腐蚀试验结果，否则应按GB/T433416中的有关规定，进行补项检验。524IFTHEMATERIALISREQUIREDTORESISTINTERCRYSTALLINECORROSION,RESULTOFINTERCRYSTALLINECORROSIONTESTSHALLBEWRITTENINTHECERTIFICATEOFQUALIFICATIONOTHERWISE,ADDITIONALTESTSHALLBEDONEACCORDINGTOGB/T433416525输送毒性程度为极度危害和高度危害介质管子的质量证明文件中应有超声波检测结果，否则应按GB5777的规定，逐根进行检验。525ULTRASONICDETECTIONRESULTFORPIPECONVEYINGUTMOSTHAZARDORHIGHHAZARDMEDIUMSHALLBEWRITTENINCERTIFICATEOFQUALIFICATIONOTHERWISE,EACHPIPESHALLBEDETECTEDACCORDINGTOGB5777526钢管的表面质量应符合下列规定526SURFACEQUALITYOFSTEELPIPESHALLMEETFOLLOWINGSPECIFICATIONSA钢管内、外表面不得有裂纹、折叠、发纹、扎折、离层、结疤等缺陷；ATHERESHALLBENOCRACK,FOLD,HAIRLINECRACK,WRINKLE,SEPARATIONLAYERORSCABONINNEROREXTERIORSURFACEOFSTEELPIPEB钢管表面的锈蚀、凹陷、划痕及其他机械损伤的深度，不应超过相应产品标准允许的壁厚负偏差；BDEPTHOFRUST,HOLLOW,SCRATCHANDOTHERMECHANICALDAMAGESCANTEXCEEDTHEPERMISSIBLEVARIATIONOFWALLTHICKNESSC钢管端部螺纹、坡口的加工精度及粗糙度应达到设计文件或制造标准的要求；CWORKINGACCURACYANDROUGHNESSOFTHREADANDGROOVEATENDOFSTEELPIPESHALLMEETTHEREQUIREMENTSINDESIGNDOCUMENTOFMANUFACTURESTANDARDD有符合产品标准规定的标识。DHAVEMARKSMEETINGSTANDARD527SHA级管道中，设计压力等于或大于10MPA管子，外表面应按下列方法逐根进行无损检测，检测方法和缺陷评定应符合JB4730的规定，检验结果以I级为合格527NONDESTRUCTIVETESTSHALLBEDONEFORSURFACEOFEACHPIPEWHOSEDESIGNPRESSURE10MPAAMONGSHALEVELPIPELINESTESTMETHODSANDEVALUATIONOFDEFECTSHALLMEETSPECIFICATIONSOFJB4730GRADEWILLBEQUALIFIEDA外径大于12MM的导磁性钢管，应采用磁粉检测；AMAGNETICPARTICLEINSPECTIONSHALLBECARRIEDOUTFORMAGNETICPERMEABLESTEELPIPEWITHEXTERNALDIAMETERLARGERTHAN12MMB非导磁性钢管，应采用渗透检测。BPENETRATIONTESTSHALLBEDONEFORMAGNETICIMPERMEABLESTEELPIPE528SHA级管道中，设计压力小于10MPA的输送极度危害介质（苯除外）的管子，每批（指同批号、同炉罐号、同材质、同规格）应抽5且不少于一根，按本规范527条规定的方法和评定标准进行外表面磁粉检测或渗透检测，检验结果以II级为合格。抽样检验不合格时，应按本规范517条的规定处理。528EXTERIORSURFACEMAGNETICPARTICLEINSPECTIONORPENETRATIONTESTSHALLBEDONEFOR5ATLEASTONEPIECEOFEACHBATCHOFTHESAMELOTNUMBER,STOVENUMBER,MATERIALANDSPECIFICATIONOFPIPESCONVEYINGUTMOSTHAZARDMEDIUMEXCEPTBENZENEWITHDESIGNPRESSURELESSTHAN10MPAACCORDINGTOMETHODSANDCRITERIAFOREVALUATIONINCLAUSE527GRADEWILLBEQUALIFIEDIFITISUNQUALIFIED,THEPIPESSHALLBETREATEDACCORDINGTOCLAUSE517529管子经磁粉检测或渗透检测发现的表面缺陷允许修磨，修磨后的实际壁厚不得小于管子公称壁厚的90，且不得小于设计文件规定的最小壁厚。529SURFACEDEFECTFOUNDBYMAGNETICPARTICLEINSPECTIONORPENETRATIONTESTCANBEGRINDEDBUTTHEWALLTHICKNESSAFTERGRINDINGCANTBELESSTHAN90OFNOMINALTHICKNESSOFTHEPIPEANDMINTHICKNESSSPECIFIEDINDESIGNDOCUMENT53阀门检验INSPECTIONOFVALVE531设计文件要求做低温密封试验的阀门，应有制造单位的低温密封性试验合格证明书。531IFCRYOGENICSEALTESTFORVALVEISREQUIREDINDESIGNDOCUMENT,CERTIFICATEOFQUALIFICATIONFORCRYOGENICSEALTESTSHALLBEPROVIDEDBYTHEMANUFACTURER532用于SHA级管道的通用阀门，其焊缝或阀体、阀盖的铸钢件，应有符合SH3064规定的无损检测合格证明书。532CERTIFICATEOFQUALIFICATIONMEETSH3064FORNONDESTRUCTIVETESTOFWELDJOINTANDSTEELCASTINGOFBODYANDCOVEROFUNIVERSALVALVEFORSHALEVELPIPELINESHALLBEPROVIDED533阀门安装前，应按设计文件中的“阀门规格书”，对阀门的阀体、密封面及有特殊要求的垫片和填料的材质进行抽检，每批至少抽查一件；合金钢阀门的阀体应逐件进行光谱分析。若不符合要求，该批阀门不得使用。533BEFOREINSTALLATIONOFVALVE,SAMPLINGINSPECTIONSHALLBEDONEFORMATERIALSOFVALVEBODY,SEALINGFACE,GASKETANDFILLERHAVINGSPECIALREQUIREMENTATLEASTONEOFEACHBATCHSHALLBEINSPECTEDSPECTRALANALYSISSHALLBEDONEFORVALVEBODYOFEACHALLOYSTEELVALVEIFITISUNQUALIFIED,THEBATCHOFVALVESCANTBEUSED534阀门的外观质量应符合产品标准的要求，不得有裂纹、氧化皮、粘砂、疏松等影响强度的缺陷。534APPEARANCEQUALITYOFVALVESHALLMEETREQUIREMENTINPRODUCTSTANDARDTHERESHALLBENOCRACK,SCALE,SANDFUSION,LOOSEANDOTHERDEFECTSTHATCANIMPACTSTRENGTHOFVALVE535阀门在安装前，应逐个对阀体进行液体压力试验，试验压力为公称压力的15倍，停压5MIN，无泄漏为合格。535BEFOREINSTALLATION,HYDRAULICTESTSHALLBEDONEFOREACHVALVEBODYMAINTAINTHETESTPRESSUREAT15TIMESOFNOMINALPRESSUREFOR5MINIFTHEVALVEISNOTLEAKY,ITISQUALIFIED536具有上密封结构的阀门，应逐个对上密封进行试验，试验压力为公称压力的11倍。试验时应关闭上密封面，并松开填料压盖，停压4MIN，无渗漏为合格。536IFTHEVALVEHASUPPERSEALSTRUCTURE,EACHUPPERSEALSHALLBETESTEDUPPERSEALFACESHALLBECLOSEDANDCOVEROFFILLERSHALLBELOOSENEDMAINTAINTHETESTPRESSUREAT11TIMESOFNOMINALPRESSUREFOR4MINIFTHEVALVEISNOTLEAKY,ITISQUALIFIED537阀门液体压力试验和上密封试验应以洁净水为介质。不锈钢阀门液体压力试验时，水中的氯离子含量不得超过100MG/L，试验合格后应立即将水渍清除干净。537CLEANWATERSHALLBEUSEDASMEDIUMFORHYDRAULICTESTANDUPPERSEALTESTWHENHYDRAULICTESTISDONEFORSTAINLESSSTEELVALVE,CONTENTOFCHLORIDEIONINWATERCANTEXCEED100MG/LAFTERTEST,WATERSPOTSHALLBEREMOVED538阀门的阀座密封面应按SH3064的规定进行密封性试验。538LEAKAGETESTFORSEALINGSURFACEOFVALVESEATSHALLBEDONEACCORDINGTOSH3064539凡按SH3064或API标准制造并有相应认证标志，且用户到制造厂监造和验收的阀门，每批可按5且不少于一个进行抽检，若有不合格，应按本规范517条的规定处理。539IFVALVESAREMANUFACTUREDACCORDINGTOSH306ORAPISTANDARD,HAVECERTIFICATIONMARKSANDARESUPERVISEDANDINSPECTEDBYTHEUSERINTHEMANUFACTURERSPLANT,5OFEACHBATCHATLEAST1PIECEWILLBECHECKEDIFTHEREISUNQUALIFIEDVALVE,ITSHALLBETREATEDACCORDINGTOCLAUSE5175310安全阀应按设计文件规定的开启压力进行调试。调压时压力应平稳，启闭试验不得少于3次。调试合格后，应及时进行铅封。5310COMMISSIONINGOFSAFETYVALVESHALLBECARRIEDOUTWITHCRACKINGPRESSURESPECIFIEDINDESIGNDOCUMENTTHEPRESSURESHALLBESTABLEATLEASTTHREETIMESOFSTARTSTOPTESTSHALLBEDONEQUALIFIEDSAFETYVALVESHALLBESEALEDWITHLEADAFTERCOMMISSIONING5311检验、试验合格的阀门，应作出标识，并填写阀门检验、试验记录。5311QUALIFIEDVALVESSHALLBEMARKED,ANDINSPECTIONANDTESTRECORDSSHALLBEMADE54其他管道组成件检验INSPECTIONOFCONSTITUENTELEMENTSOFOTHERPIPES541对其他管道组成件的产品质量证明文件，应进行核对，且下列项目应符合产品标准的要求A化学成分及力学性能；B合金钢锻件的金相分析结果；C热处理结果及焊缝无损检测报告。541CERTIFICATEOFQUALIFICATIONOFCONSTITUENTELEMENTSOFOTHERPIPESSHALLBECHECKEDFOLLOWINGITEMSSHALLMEETTHEREQUIREMENTSINPRODUCTSTANDARDACHEMICALCONSTITUTIONANDMECHANICALPROPERTYBMETALLOGRAPHICANALYSISRESULTOFALLOYSTEELFORGINGCHEATTREATMENTRESULTANDNONDESTRUCTIVETESTREPORTOFWELDJOINT542管件外表面应有制造厂代号（商标）、规格、材料牌号和批号等标识，并与质量证明文件相符，否则不得使用。542EXTERIORSURFACEOFELEMENTSSHALLHAVECODENAMETRADEMARK,SPECIFICATIONANDBRANDANDLOTNUMBEROFMATERIALTHATARECONFORMTOCERTIFICATEOFQUALIFICATIONOTHERWISE,ITCANTBEUSED543管件的表面不得有裂纹，外观应光滑、无氧化皮，表面的其他缺陷不得超过产品标准规定的允许深度。坡口、螺纹加工精度应符合产品标准的要求。焊接管件的焊缝应成形良好，且与母材圆滑过渡，不得有裂纹、未熔合、未焊透、咬边等缺陷。543SURFACEOFELEMENTSSHALLBESMOOTHWITHOUTCRACKANDSCALEOTHERDEFECTSONSURFACECANTEXCEEDTHEPERMISSIBLEDEPTHSPECIFIEDINPRODUCTSTANDARDWORKINGACCURACYTHREADANDGROOVEATENDSHALLMEETTHEREQUIREMENTSINPRODUCTSTANDARDWELDJOINTOFPIPESSHALLBESMOOTHANDWELLJOINWITHTHEPIPETHERESHALLBENOCRACK,STICKOUTWELD,FAULTYFUSIONANDUNDERCUT544SHA级管道的管件应按本规范527条、528条的规定进行表面无损检测。544NONDESTRUCTIVETESTFORSURFACEOFELEMENTSOFSHALEVELPIPELINESHALLBECARRIEDOUTACCORDINGTOCLAUSE527AND528OFTHESPECIFICATION545螺栓、螺母的螺纹应完整，无划痕、毛刺等缺陷，加工精度符合产品标准的要求。螺栓、螺母应配合良好，无松动或卡涩现象。545THREADSOFBOLTANDNUTSHALLBECOMPLETEWITHOUTSCRATCHORBURRWORKINGACCURACYSHALLMEETTHEPRODUCTSTANDARDBOLTANDNUTSHALLFITWITHEACHOTHERWITHOUTLOOSEORLOCK546设计压力等于或大于10MPA管道用的合金钢螺栓、螺母，应逐件进行快速光谱分析，每批应抽两件进行硬度检验，若有不合格，按本规范517条的规定处理。546QUICKSPECTRALANALYSISTESTOFEACHALLOYSTEELBOLTANDNUTFORPIPELINEWITHDESIGNPRESSURE10MPASHALLBEDONEHARDNESSINSPECTIONOFTWOELEMENTSEACHBATCHSHALLBETESTEDIFITISUNQUALIFIED,ITSHALLBETREATEDACCORDINGTOCLAUSE517547设计温度低于29的低温管道合金钢螺栓、螺母，应逐件进行快速光谱分析检验，每批应抽两根螺栓进行低温冲击性能检验。若有不合格，应按本规范517条的规定进行处理。547QUICKSPECTRALANALYSISTESTOFEACHALLOYSTEELBOLTANDNUTFORPIPELINEWITHDESIGNTEMPERATURELOWERTHAN29SHALLBEDONELOWTEMPERATUREIMPACTPERFORMANCETESTOFTWOBOLTSEACHBATCHSHALLBEDONEIFITISUNQUALIFIED,ITSHALLBETREATEDACCORDINGTOCLAUSE517548其他合金钢管道组成件的快速光谱分析，每批应抽检5，且不少于一件。若有不合格，应按本规范517条的规定处理。5485ATLEASTONEPIECEOFEACHBATCHOFALLOYSTEELELEMENTSFOROTHERPIPELINESSHALLBETESTEDWITHQUICKSPECTRALANALYSISIFITISUNQUALIFIED,ITSHALLBETREATEDACCORDINGTOCLAUSE517549密封垫片应按产品标准进行抽样检查验收，每批不得少于一件。缠绕垫片不得有松散、翘曲现象，表表面不得有影响密封性能的伤痕、空隙、凹凸不平及锈斑等缺陷。金属垫片、石棉橡胶板垫片的边缘应切割整齐，表面应平整光滑，不得有气泡、分层、折皱、划痕等缺陷。549SAMPLINGINSPECTIONATLEASTONEPIECEPERBATCHOFGASKETSEALSHALLBECARRIEDOUTACCORDINGTOTHEPRODUCTSTANDARDTHEGASKETCANTBELOOSEORWARPEDTHERESHALLBENOSCAR,GAP,SAG,CRESTANDRUSTYSTAINTHATMAYIMPACTSEALINGPROPERTYONSURFACEEDGEOFMETALLICGASKETANDRUBBERSLATGASKETSHALLBESMOOTHTHESURFACESHALLBESMOOTHANDEVENWITHOUTBUBBLE,SEPARATIONLAYER,FOLDORSCRATCH5410现场制作石棉橡胶板垫片，不得在低于15的环境中进行，且自板材制成之日起，耐油石棉橡胶板储存期限不得超过一年半，普通石棉橡胶板储存期限不得超过两年。5410TEMPERATUREOFWORKSHOPFORPRODUCTIONOFASBESTOSPACKINGGASKETCANTBELESSTHAN15STORAGELIFEOFOILPROOFASBESTOSPACKINGSHEETCANTEXCEEDONEANDHALFYEAR,ANDTHATOFCOMMONASBESTOSPACKINGSHEETCANTEXCEEDTWOYEARS5411法兰密封面不得有径向划痕等缺陷。5411FLANGESHALLBESEALEDWITHOUTRADIALSCRATCH6管道预制及安装PREFABRICATIONANDINSTALLATIONOFPIPELINE61管道预制PREFABRICATIONOFPIPELINE611管道预制加工应按现场审查确认的设计单线图或依据管道平、剖面图绘制的单线图进行，预制加工图上应标注管线编号、现场组焊位置和调节裕量。611PREFABRICATIONOFPIPELINESHALLBECARRIEDOUTACCORDINGTODESIGNEDSINGLELINEDIAGRAM,ORSINGLELINEDIAGRAMDRAWNBASEDUPONPLANEANDSECTIONOFPIPELINETHATAREAPPROVEDONSITENUMBEROFPIPELINE,POSITIONOFGANGWELDINGANDOVERMEASURESHALLBEINDICATEDINTHEWORKINGDIAGRAM612管道预制过程中的每一道工序，均应核对管子的标识，并做好标识的移植。不锈钢管道、低温钢管道，不得使用钢印作标识。612DURINGEACHSEQUENCEOFPREFABRICATION,MARKSOFPIPELINESHALLBECHECKEDTRANSFEROFMARKSSHALLBEDONEWELLSTEELMARKCANTBEUSEDFORSTAINLESSSTEELPIPEANDLOWTEMPERATURESTEELPIPE613弯管最小弯曲半径应符合设计文件要求，当设计文件未规定时，应符合表2的规定。613MINBENDINGRADIUSOFELBOWPIPESHALLMEETTHEREQUIREMENTINDESIGNDOCUMENTIFITISNOTSPECIFIEDINTHEDESIGNDOCUMENT,ITSHALLMEETTHESPECIFICATIONINTABLE2表2弯管最小弯曲半径TABLE2MINBENDINGRADIUSOFELBOWPIPE管道设计压力DESIGNPRESSUREOFPIPEMPA弯管制作方式FABRICATIONMODE最小弯曲半径MINBENDINGRADIUS热弯HOTBENDING35D010冷弯COLDBENDING40D010冷、热弯COLDANDHOTBENDING50D0注D0为管子外径。NOTESDNISEXTERIORDIAMETEROFPIPELINE614当设计允许用焊接钢管弯制弯管时，焊缝应避开受拉或受压区。614IFITISALLOWABLETHATELBOWPIPECANBEFABRICATEDBYWELDINGOFPIPES,THEWELDJOINTCANTBEINTENSILEORCOMPRESSIVEREGION615弯管制作后，弯管处的最小壁厚不得小于管子公称壁厚的90，且不得小于设计文件规定的最小壁厚。弯管处的最大外径与最小外径之差，应符合下列规定615AFTERFABRICATIONOFELBOWPIPE,MINWALLTHICKNESSATELBOWCANTBELESSTHAN90OFTHENOMINALTHICKNESSANDMINTHICKNESSSPECIFIEDINTHEDESIGNDOCUMENTDIFFERENCEBETWEENMAXEXTERIORDIAMETERANDMINEXTERIORDIAMETERATELBOWSHALLMEETTHEFOLLOWINGSPECIFICATIONSASHA级管道应小于弯制前管子外径的5；AFORSHALEVELPIPELINE,THEDIFFERENCESHALLBELESSTHAN5OFEXTERIORDIAMETEROFPIPEBEFOREFABRICATIONBSHB、SHC及SHD级管道应小于弯制前管子外径的8。BFORSHB,SHCANDSHDLEVELPIPELINES,ITSHALLBELESSTHAN8OFEXTERIORDIAMETEROFPIPEBEFOREFABRICATION616弯管制作后，直管段中心线偏差不得大于15MM/M，且不得大于5MM。616AFTERFABRICATIONOFELBOWPIPE,DEVIATIONOFCENTRALLINEOFSTRAIGHTSECTIONCANTBELARGERTHAN15MM/MAND5MM图1弯管中心偏差FIG1CENTRALDEVIATIONOFELBOWPIPE617钢管热弯或冷弯后的热处理，应符合下列规定617AFTERHOTORCOOLBENDING,HEATTREATMENTOFSTEELPIPESHALLMEETFOLLOWINGSPECIFICATIONSA钢管的热弯温度与弯后热处理应按表3的规定进行，表中未列入的钢号，按该材料供货状态的要求进行；AHOTBENDINGTEMPERATUREANDHEATTREATMENTOFSTEELPIPESHALLMEETTABLE3STEELPIPENOTLISTEDINSHALLMEETTHEREQUIREMENTINDELIVERYSTATEOFTHEMATERIALB钢管冷弯后的热处理应按表4的规定进行；BAFTERCOLDBENDING,HEATTREATMENTOFSTEELPIPESHALLBECARRIEDOUTACCORDINGTOTABLE4C公称直径大于100MM或壁厚大于13MM的铁素体合金钢管弯制后，应进行消除应力的热处理；CAFTERBENDINGOFFERRITICALLOYSTEELPIPEWHOSENOMINALDIAMETERISLARGERTHAN100MMORWALLTHICKNESSISLARGERTHAN13MM,HEATTREATMENTFORSTRESSRELIEFSHALLBECARRIEDOUTD有应力腐蚀的冷弯弯管，应作消除应力的热处理；DHEATTREATMENTFORRELIEVINGOFSTRESSSHALLBEDONEFORCOLDBENDINGELBOWPIPEHAVINGSTRESSCORROSIONE热处理时的加热速度、恒温时间、冷却速度应符合本规范749条的规定。EHEATINGRATE,TIMEOFCONSTANTTEMPERATURE,COOLINGRATEFORHEATTREATMENTSHALLMEETCLAUSE749INTHESPECIFICATION表3钢管热弯温度及热处理TABLE3HOTBENDINGTEMPERATUREANDHEATTREATMENTOFSTEELPIPE钢种或钢号STEELTYPEORGRADE热弯温度HOTBENDINGTEMPERATURE热处理要求REQUIREMENTFORHEATTREATMENT10,207501050终弯温度小于900，且壁厚大于等于19MM时，进行600650回火。FINALBENDINGTEMPERATURESHALLBELOWERTHAN900,IFWALL16MN9001050THICKNESSIS19MM,TEMPERINGSHALLBEPERFORMEDAT60065012CRMO15CRMO8001050900920正火NORMALIZINGAT90092012CR1MOV80010509801020正火加720760回火NORMALIZINGAT9801020ANDTEMPERINGAT7207601CR5MO8001050850875完全退火或725750高温回火COMPLETEANNEALINGAT850875ORTEMPERINGAT7257500CR18NI9CR18NI12MO2TICR25NI20900120010501100固溶化DISSOLVEDAT10501100表4钢管冷弯后热处理TABLE4HEATTREATMENTAFTERCOOLBENDINGOFSTEELPIPE钢种或钢号STEELTYPEORGRADE壁厚WALLTHICKNESSMM弯曲半径BENDINGRADIUS热处理要求REQUIREMENTFORHEATTREATMENT36任意RANDOM19365D0600650退火ANNEALINGAT60065010，2020任意RANDOM132035D0680700退火ANNEALINGAT68070012CRMO15CRMO20任意RANDOM132035D0720760退火ANNEALINGAT72076012CR1MOV6000010020垫片厚10THICKNESSOFGASKET106211机器试车前，应对管道与机器的连接法兰进行最终连接检查。检查时，在联轴器上架设百分表监视位移，然后松开和拧紧法兰连接螺栓进行观测，其位移应符合下列规定6211BEFORECOMMISSIONINGOFMACHINE,FLANGECONNECTINGPIPEANDMACHINESHALLBECHECKEDDIALINDICATORSHALLBEERECTEDONSHAFTCOUPLINGTOMONITORTHEDISPLACEMENTLOOSENANDTIGHTENJOINTBOLTOFFLANGETOOBSERVEITSDISPLACEMENTTHEDISPLACEMENTSHALLMEETFOLLOWINGSPECIFICATIONSA当转速大于6000R/MIN时，位移值应小于002MM；AWHENROTARYSPEEDISLARGERTHAN6000R/MIN,THEDISPLACEMENTSHALLBELESSTHAN002MMB当转速小于或等于6000R/MIN时，位移值应小于005MM。BWHENROTARYSPEEDISLESSTHANOREQUALTO6000R/MIN,THEDISPLACEMENTSHALLBELESSTHAN005MM6212管道系统试运行时，高温或低温管道的连接螺栓，应按下列规定进行热态紧固或冷态紧固6212DURINGCOMMISSIONINGOFPIPING,THERMALSTATEFASTENINGORCOLDSTATEFASTENINGOFJOINTBOLTOFHIGHTEMPERATUREORLOWTEMPERATUREPIPELINESHALLMEETTHEFOLLOWINGSPECIFICATIONSA螺栓热态紧固或冷态紧固作业的温度应符合表7的规定；AWORKINGTEMPERATUREFORTHERMALSTATEFASTENINGORCOLDSTATEFASTENINGOFBOLTSHALLMEETSPECIFICATIONSINTABLE7表7螺栓热态紧固、冷态紧固作业温度单位TABLE7WORKINGTEMPERATUREFORTHERMALSTATEFASTENINGORCOLDSTATEFASTENINGOFBOLTUNIT工作温度WORKINGTEMPERATURE一次热紧、冷紧温度TEMPERATUREFORPRIMARYTHERMALSTATEFASTENING,COLDSTATEFASTENING二次热紧、冷紧温度TEMPERATUREFORSECONDARYTHERMALSTATEFASTENING,COLDSTATEFASTENING250350工作温度WORKINGTEMPERATURE350350工作温度WORKINGTEMPERATURE7029工作温度WORKINGTEMPERATURE90CITISRAININGORSNOWING715钨极氩弧焊宜用铈钨棒。使用氩气的纯度应在9995以上。715CERIUMTUNGSTENRODMAYBEUSEDFORARGONTUNGSTENARCWELDINGPURITYOFARGONSHALLBEOVER9995716管道焊接不得使用氧乙炔焰焊接。716OXYACETYLENEFLAMECANBEUSEDFORWELDINGOFPIPELINE72焊前准备与接头组对PREPARATIONANDASSEMBLYOFJOINTS721管道焊缝的设置，应便于焊接、热处理及检验，并应符合下列要求721POSITIONOFSEAMSSHALLBECONVENIENTFORWELDING,HEATTREATMENTANDINSPECTION,ANDMEETFOLLOWINGREQUIREMENTSA除采用无直管段的定型弯头外，管道焊缝的中心与弯管起弯点的距离不应小于管子外径，且不小于10MM；AEXCEPTSIZINGELBOWWITHOUTSTRAIGHTPIPE,DISTANCEBETWEENCENTEROFWELDEDPIPEANDORIGINOFELBOWCANTBELESSTHANEXTERIORDIAMETEROFPIPEAND10MMB焊缝与支，吊架边缘的净距离不应小于50MM。需要热处理的焊缝距支、吊架边缘的净距离应大于焊缝宽度的5倍，且不小于100MM；BNETDISTANCEBETWEENSEAMANDEDGESOFSUPPORTANDHANGERCANTBELESSTHAN50MMNETDISTANCEBETWEENSEAMNEEDINGHEATTREATMENTANDEDGESOFSUPPORTANDHANGERSHALLBELARGERTHAN5TIMESOFWIDTHOFSEAMANDCANTBELESSTHAN100MMC管道两相邻焊缝中心的间距，应控制在下列范围内1直管段两环缝间距不小于100MM，且不小于管子外径；2除定型管件外，其他任意两焊缝间的距离不小于50MM；CDISTANCEBETWEENCENTERSOFTWONEIGHBORINGSEAMSSHALLBECONTROLLEDWITHINTHEFOLLOWINGRANGE1THEDISTANCEBETWEENTWOCIRCUMFERENTIALSEAMSOFSTRAIGHTPIPECANTBELESSTHAN100MMANDEXTERIORDIAMETEROFPIPELINE2EXCEPTCALIBRATIONPIPE,DISTANCEBETWEENANYTWOSEAMSCANTBELESSTHAN50MMD在焊接接头及其边缘上不宜开孔，否则被开孔周围一倍孔径范围内的焊接接头，应100进行射线检测；DWELDJOINTANDITSEDGESHALLNOTBEPREFERABLYPERFORATEDOTHERWISE,100RADIALTESTSHALLBEDONEFORWELDJOINTSWITHINONEAPERTURERANGEE管道上被补强圈或支座垫板覆盖的焊接接头，应进行100射线检测，合格后方可覆盖。E100RADIALTESTSHALLBEDONEFORWELDJOINTTOBECOVEREDBYSTIFFENINGRINGORSUPPORTPAD722焊接接头的坡口形式、尺寸及组对要求，若设计文件未规定时，宜按附录B确定。722TYPEOFGROOVE,DIMENSIONANDASSEMBLYREQUIREMENTOFWELDJOINTSSHALLBECONFIRMEDACCORDINGTOAPPENDIXBIFTHEREISNOREQUIREMENTINDESIGNDOCUMENT723管子坡口应按下列方法加工ASHA级管道的管子，应采用机械方法加工；BSHB、SHC及SHD级管道的管子，宜用机械方法加工。当采用氧乙炔焰或等离子切割时，切割后必须除去影响焊接质量的表面层。723GROOVEOFPIPELINESHALLBEPROCESSEDWITHFOLLOWINGMETHODAFORSHALEVELPIPE,MECHANICALTREATMENTMETHODSHALLBEADOPTEDBFORSHB,SHCANDSHDPIPES,MECHANICALTREATMENTMETHODMAYBEADOPTEDIFOXYACETYLENEFLAMEORPLASMAISADOPTED,SURFACECOATTHATCANIMPACTWELDINGQUALITYSHALLBEREMOVEDAFTERCUTTING724壁厚相同的管道组成件组对时，应使内壁平齐，其错边量不应超过下列规定ASHA级管道为壁厚的10，且不大于05MM；BSHB、SHC及SHD级管道为壁厚的10，且不大于1MM。724WHENASSEMBLINGELEMENTSOFPIPESWITHTHESAMEWALLTHICKNESS,THEINNERWALLSHALLBEEVENUNFITNESSOFBUTTJOINTCANTEXCEEDTHEFOLLOWINGVALUESAFORSHALEVELPIPE,10OFWALLTHICKNESSANDNOTLARGERTHAN05MMBFORSHB,SHCANDSHDPIPES,10OFWALLTHICKNESSANDNOTLARGERTHAN1MM725壁厚不同的管道组成件组对，当壁厚差大于下列数值时，应按图2、图3的要求加工。ASHA级管道的内壁差05MM或外壁差2MM；BSHB、SHC及SHD级管道的内壁差10MM或外壁差2MM。725WHENASSEMBLINGELEMENTSOFPIPESWITHDIFFERENTWALLTHICKNESS,IFDIFFERENTOFWALLTHICKNESSEXCEEDSFOLLOWINGVALUES,PROCESSINGSHALLBEDONEACCORDINGTOFIGURE2AND3AFORSHALEVELPIPEINNERWALL05MM,OREXTERIORWALL2MMBFORSHB,SHCANDSHDPIPESINNERWALL10MM,OREXTERIORWALL2MM图2不同壁厚管子加工要求FIG2REQUIREMENTSFORPROCESSINGOFPIPESWITHDIFFERENTWALLTHICKNESS图3不同壁厚管子和管件加工要求FIG3REQUIREMENTSFORPROCESSINGOFPIPESANDELEMENTSWITHDIFFERENTWALLTHICKNESS726焊接接头的坡口的渗透检测应按下列规定进行A材料淬硬倾向较大的管道坡口100检测；B设计温度低于29的非奥氏体不锈钢管道坡口抽检5。726REQUIREMENTSFORPENETRATIONTESTOFWELDJOINTSGROOVEA100OFGROOVESWITHTRENDOFHARDENQUENCHINGSHALLBETESTEDB5OFGROOVESOFNONAUSTENITICSTAINLESSSTEELPIPEWHOSEDESIGNTEMPERATUREISLOWERTHAN29SHALLBETESTED727焊接接头组对前，应用手工或机械方法清理其内外表面，在坡口两侧20MM范围内不得有油漆、毛刺、锈斑、氧化皮及其他对焊接过程有害的物质。727BEFOREASSEMBLYOFWELDJOINTS,INNERANDEXTERIORFACESOFITSHALLBEREMOVEDWITHMANUALORMECHANICALMETHODTHERESHALLBENOPAINT,BURR,RUSTYSTAIN,SCALEANDOTHERSUNDRIESIN20MMRANGEATTWOSIDESOFGROOVESTHATCANIMPACTWELDING728焊接接头组对前，应确认坡口加工形式、尺寸，其表面不得有裂纹、夹层等缺陷。728BEFOREASSEMBLYOFWELDJOINTS,MACHININGMODEANDDIMENSIONOFGROOVESSHALLBECHECK