拱顶冷热熔盐储罐焊接施工焊接检验规定

1、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Weldqualityvisualinspection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,incom

2、pletelyfilledweldingandotherdefectsarenotallowedtoappearonthesurfaceoftheweldingseamsandtheheataffectedzone;theformationshouldbefine,theweldingseamsandtheparentmaterialsshouldbeinroundingoff,thefilletheightshouldbeinaccordancewiththedesignspecifications,andthewidthofthebuttweldsshouldexceedthegroove

3、ateachedgeabout1-2mm.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.底圈壁板与

4、边缘板的T型接头罐内角焊缝应符合设计要求。10.1.3TheshellatthebottomringandtheTjointtankinnerangleweldingseamoftheedgeplateshallconformtothedesignrequirements.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。10.1.4Theverticalbuttweldsofthetankwallshouldnotbe

5、lowerthanthehollowoftheparentmaterialsurface;thecircumferentialseamweldofthetankwallandthebuttweldsatthetankbottomcannotshallnotbelowerlargerthan0.5mmofthehollowdepthoftheparentsurface,theconsecutivelengthofhollowcannotshallnotexceed100mmandthetotallengthofhollowcannotexceed10%oftheweldingseamlength

6、.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1mma.Reinforcementofbuttweldb.焊缝的宽度应按坡口宽度两侧各增加12mm确定；b.Widthoftheweldshallbedeterminedasperbothsidesofthebevelwidthincrease12mmrespectively;10.2焊缝无损检测10.1 NDTandtightnesstestofweld从事储罐焊缝无损检测的人员，必须具有国家有关

7、部门颁发的并与其工作相适应的资格证书。10.2.1Thepersonnelengagedinnon-destructivetestingmustholdthequalificationcertificatesthatareissuedbynationalauthoritiesandareintermsofrelatedjobs.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。10.2.2 thebuttweldoftheedgeplateshouldbetestedforpenetration,andtheouterendofthebuttweldshallbetest

8、edforX-ray.罐底板丁字焊缝的打底焊缝焊接完成后进行渗10.2.3 thepenetrationinspectionaftertheweldingofthebottomplateofthebottomplateofthebottomplateofthebottomplateshallbecheckedfor200mminthreedirections.罐底板所有焊缝均进行100%超声和100%渗透检测。10.2.4 TankBottomAllweldsare100%Ultrasonicand100%Penetrant.罐壁焊缝的无损检测：10.2.5 Nondestructivetes

9、tingofweldsintankwalls:10.2.5.1 壁厚25mm的纵向焊缝应进行100%的射线检测；10.2.5.1 longitudinalweldswithwallthickness>25mmshallbetestedfor100%10.2.5.2 底圈罐壁42(44)mm*67m对接焊缝、42(44)mm*34m环向焊缝、34mm*25mi环向焊缝100%RT检测。1025.2 Bottomcirclewall42(44)mm*67mmbuttweld,42(44)mm*34mmcircumferentialweld,34mm*25mmcircumferentialweld100%RTdetection.10.2.5.3 罐壁所有丁字焊缝100%RT佥测，检测区域为三个方向各300mm10.2.5.3 TankwallAllT-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。10.2.5.4 Allweldsatthebottomofthetankaresubjectedtotightnesstestsusingavacuumb