拱顶冷热熔盐储罐焊接施工焊接检验规定

拱顶冷热熔盐储罐焊接施工焊接检验规定10Weldinginspection10.1焊缝外观质量检验10.1Weldqualityvisualinspection10.1.1焊接检查前，焊工将熔渣、飞溅处理干净；焊缝表面及热影响区，不得有裂纹、气孔、夹渣、弧坑和未焊满等缺陷；成型要良好，焊缝与母材应圆滑过渡，焊角高度符合设计规定，对接焊缝宽度盖过每边盖过坡口1-2mm为宜。10.1.1Priortocheckingthewelding,theweldershouldcleartheslagsandthesplashes;thecracks,air-vents,slaginclusions,craters,incompletelyfilledweldingandotherdefectsarenotallowedtoappearonthesurfaceoftheweldingseamsandtheheataffectedzone;theformationshouldbefine,theweldingseamsandtheparentmaterialsshouldbeinroundingoff,thefilletheightshouldbeinaccordancewiththedesignspecifications,andthewidthofthebuttweldsshouldexceedthegrooveateachedgeabout1–2mm.10.1.2对接焊缝的咬边深度不得大于0.5mm，咬边的连续长度不得大于100mm，焊缝两侧咬边总长度不超过该焊缝总长度的10%；10.1.2Theundercutdepthofbuttweldsisnotallowedtoexceed0.5mm,theconsecutivelengthofundercutisnotallowedtoexceed100mm,andthetotalundercutlengthatbothsidesofweldingseamscannotexceedthe10%ofthetotallengthofthisweldingseam.10.1.3底圈壁板与边缘板的T型接头罐内角焊缝应符合设计要求。10.1.3TheshellatthebottomringandtheTjointtankinnerangleweldingseamoftheedgeplateshallconformtothedesignrequirements.10.1.4罐壁纵向对接焊缝不得有低于母材表面的凹陷；罐壁环缝和罐底对接焊缝低于母材表面的凹陷深度不得大于0.4mm，凹陷的连续长度不得大于100mm，凹陷的总长度，不得大于该焊缝长度的10%。底圈罐壁板纵焊缝、边缘板对接焊缝不允许存在咬边。10.1.4Theverticalbuttweldsofthetankwallshouldnotbelowerthanthehollowoftheparentmaterialsurface;thecircumferentialseamweldofthetankwallandthebuttweldsatthetankbottomcannotshallnotbelowerlargerthan0.5mmofthehollowdepthoftheparentsurface,theconsecutivelengthofhollowcannotshallnotexceed100mmandthetotallengthofhollowcannotexceed10%oftheweldingseamlength.10.1.5对接焊缝的余高，应符合下表规定：10.1.5Reinforcementofbuttweldshallconformtothestipulationofbelowtable:a.对接焊缝余高不大于1mm。a.Reinforcementofbuttweldb.焊缝的宽度应按坡口宽度两侧各增加1～2mm确定；b.Widthoftheweldshallbedeterminedasperbothsidesofthebevelwidthincrease1～2mmrespectively;10.2焊缝无损检测10.2NDTandtightnesstestofweld10.2.1从事储罐焊缝无损检测的人员，必须具有国家有关部门颁发的并与其工作相适应的资格证书。10.2.1Thepersonnelengagedinnon-destructivetestingmustholdthequalificationcertificatesthatareissuedbynationalauthoritiesandareintermsofrelatedjobs.10.2.2边缘板的对接焊缝应进行渗透检测，且对接焊缝的外端300mm进行射线检测。10.2.2thebuttweldoftheedgeplateshouldbetestedforpenetration,andtheouterendofthebuttweldshallbetestedforX-ray.10.2.3罐底板丁字焊缝的打底焊缝焊接完成后进行渗透检查，沿丁字焊缝三个方向各检测200mm。10.2.3thepenetrationinspectionaftertheweldingofthebottomplateofthebottomplateofthebottomplateofthebottomplateshallbecheckedfor200mminthreedirections.10.2.4罐底板所有焊缝均进行100%超声和100%渗透检测。10.2.4TankBottomAllweldsare100%Ultrasonicand100%Penetrant.10.2.5罐壁焊缝的无损检测：10.2.5Nondestructivetestingofweldsintankwalls:10.2.5.1壁厚≥25mm的纵向焊缝应进行100%的射线检测；10.2.5.1longitudinalweldswithwallthickness≥25mmshallbetestedfor100%10.2.5.2底圈罐壁42（44）mm*67mm对接焊缝、42（44）mm*34mm环向焊缝、34mm*25mm环向焊缝100%RT检测。10.2.5.2Bottomcirclewall42(44)mm*67mmbuttweld,42(44)mm*34mmcircumferentialweld,34mm*25mmcircumferentialweld100%RTdetection.10.2.5.3罐壁所有丁字焊缝100%RT检测，检测区域为三个方向各300mm。10.2.5.3TankwallAllT-weldsare100%RTtestedandthedetectionareais300mminthreedirections.10.2.5.4罐底所有焊缝均采用真空箱法进行严密性试验。10.2.5.4Allweldsatthebottomofthetankaresubjectedtotightnesstestsusingavacuumboxmethod.10.2.5.525mm*16mm、16*10mm环向焊缝每一焊工在最初3m焊缝任意部位取300mm进行RT检测，后续每种板厚60m焊缝及其尾数内的任意部位取300mm进行射线检测，检测部位不含丁字焊缝。10.2.5.525mm*16mm,16*10mmringweldEachwelderintheinitial3mweldanypartofthe300mmforRTdetection,followthethicknessofeach60mweldandthetailofanypartofthe300mmtotaketheradiationtest,ThedetectionsitedoesnotcontainT-weld.10.2.5.610mm、16mm纵焊缝，每一焊工在最初3m焊缝任意部位取300mm进行RT检测，后续每种板厚30m焊缝及其尾数内的任意部位取300mm进行射线检测，检测部位不含丁字焊缝。10.2.5.610mm,16mmverticalweld,eachwelderintheinitial3mweldanywhere300mmforRTdetection,followthethicknessofeach30mweldandthetailofanypartofthe300mmtotaketheradiationtest,thedetectionsiteisnotWithT-shapedwelds.10.2.5.7罐壁的所有焊缝均进行100%渗透检测。10.2.5.7Allweldsinthetankwallare100%permeable.10.2.5.8射线货超声检测不合格时，应在该检测长度的两端延伸300mm做补充检测，但缺陷的部位距离底片端部75mm以上者不再延伸。如延伸部位检测仍不合格，应继续延伸检查。当某一焊工所焊接的焊缝射线检测出现多处不合格时，应对焊工所完结的焊缝100%检测。10.2.5.8RadiationinspectionUltrasonictestingfailure,shouldbeextendedatbothendsofthedetectionlengthof300mmtodothesupplementarytest,butthedefectivepartoftheendofthefilm75mmormorenolongerextend.Iftheextensionofthedetectionisstillnotqualified,shouldcontinuetoextendtheinspection.Whenawelderweldstheweldstodetectmultiplenonconformities,weldersshouldbefinished100%oftheweldinspection.10.2.5.9底板大角焊缝初层焊缝焊完后，应进行渗透检测；全部焊完后进行渗透检测；在储罐冲水试验后，应采取同样方法进行角焊缝复验。10.2.5.9Bottomplatefilletweldsafterthefirstlayerofweldsshouldbecarriedoutafterthepenetrationtest;afteralltheweldingafterthepenetrationtest;inthetankflushingtestshouldbetakenafterthesamemethodforfilletweldinspection.10.2.5.10底层罐壁上的接管角焊缝，应在热处理前、热处理后及冲水试验合格后进行渗透检测。10.2.5.10Thefilletweldsonthebottomtankwallshallbesubjectedtopenetrationtestingbeforeheattreatment,afterheattreatmentandafterflushingtest.10.2.6罐顶焊缝的无损检测：10.2.6Nondestructivetestingofcannedwelds:10.2.6.1罐顶所有搭接焊缝进行100%磁粉和渗透检测。接管与管顶板焊接的角焊缝应进行渗透检测。10.2.6.1TanktopAlllapweldsaretestedfor100%magneticpowderandpenetration.Thefilletweldsthattakeovertheroofofthepipeshouldbetestedforpenetratio