拱頂冷熱熔鹽儲罐焊接施工焊接檢驗規(guī)定

1、拱頂冷熱熔鹽儲罐焊接施工焊接檢驗規(guī)定10Weldinginspection10.1焊縫外觀質(zhì)量檢驗Weldqualityvisualinspection焊接檢查前，焊工將熔渣、飛濺處理干凈；焊縫表面及熱影響區(qū)，不得有裂紋、氣孔、夾渣、弧坑和未焊滿等缺陷；成型要良好，焊縫與母材應圓滑過渡，焊角高度符合設(shè)計規(guī)定，對接焊縫寬度蓋過每邊蓋過坡口1-2mm為宜。10.1.1Priortocheckingthewelding,theweldershouldcleartheslagsandthesplashes;thecracks,air-vents,slaginclusions,craters,incom

2、pletelyfilledweldingandotherdefectsarenotallowedtoappearonthesurfaceoftheweldingseamsandtheheataffectedzone;theformationshouldbefine,theweldingseamsandtheparentmaterialsshouldbeinroundingoff,thefilletheightshouldbeinaccordancewiththedesignspecifications,andthewidthofthebuttweldsshouldexceedthegroove

3、ateachedgeabout1-2mm.對接焊縫的咬邊深度不得大于0.5mm,咬邊的連續(xù)長度不得大于100mm焊縫兩側(cè)咬邊總長度不超過該焊縫總長度的10%10.1.2Theundercutdepthofbuttweldsisnotallowedtoexceed0.5mm,theconsecutivelengthofundercutisnotallowedtoexceed100mm,andthetotalundercutlengthatbothsidesofweldingseamscannotexceedthe10%ofthetotallengthofthisweldingseam.底圈壁板與

4、邊緣板的T型接頭罐內(nèi)角焊縫應符合設(shè)計要求。10.1.3TheshellatthebottomringandtheTjointtankinnerangleweldingseamoftheedgeplateshallconformtothedesignrequirements.罐壁縱向?qū)雍缚p不得有低于母材表面的凹陷;罐壁環(huán)縫和罐底對接焊縫低于母材表面的凹陷深度不得大于0.4mm,凹陷的連續(xù)長度不得大于100mm凹陷的總長度，不得大于該焊縫長度的10%底圈罐壁板縱焊縫、邊緣板對接焊縫不允許存在咬邊。10.1.4Theverticalbuttweldsofthetankwallshouldnotbe

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

6、.對接焊縫的余高，應符合下表規(guī)定：10.1.5Reinforcementofbuttweldshallconformtothestipulationofbelowtable:a.對接焊縫余高不大于1mma.Reinforcementofbuttweldb.焊縫的寬度應按坡口寬度兩側(cè)各增加12mm確定；b.Widthoftheweldshallbedeterminedasperbothsidesofthebevelwidthincrease12mmrespectively;10.2焊縫無損檢測10.1 NDTandtightnesstestofweld從事儲罐焊縫無損檢測的人員，必須具有國家有關(guān)

7、部門頒發(fā)的并與其工作相適應的資格證書。10.2.1Thepersonnelengagedinnon-destructivetestingmustholdthequalificationcertificatesthatareissuedbynationalauthoritiesandareintermsofrelatedjobs.邊緣板的對接焊縫應進行滲透檢測，且對接焊縫的外端300mm進行射線檢測。10.2.2 thebuttweldoftheedgeplateshouldbetestedforpenetration,andtheouterendofthebuttweldshallbetest

8、edforX-ray.罐底板丁字焊縫的打底焊縫焊接完成后進行滲10.2.3 thepenetrationinspectionaftertheweldingofthebottomplateofthebottomplateofthebottomplateofthebottomplateshallbecheckedfor200mminthreedirections.罐底板所有焊縫均進行100%超聲和100%滲透檢測。10.2.4 TankBottomAllweldsare100%Ultrasonicand100%Penetrant.罐壁焊縫的無損檢測：10.2.5 Nondestructivetes

9、tingofweldsintankwalls:10.2.5.1 壁厚25mm的縱向焊縫應進行100%的射線檢測；10.2.5.1 longitudinalweldswithwallthickness>25mmshallbetestedfor100%10.2.5.2 底圈罐壁42(44)mm*67m對接焊縫、42(44)mm*34m環(huán)向焊縫、34mm*25mi環(huán)向焊縫100%RT檢測。1025.2 Bottomcirclewall42(44)mm*67mmbuttweld,42(44)mm*34mmcircumferentialweld,34mm*25mmcircumferentialweld100%RTdetection.10.2.5.3 罐壁所有丁字焊縫100%RT僉測，檢測區(qū)域為三個方向各300mm10.2.5.3 TankwallAllT-weldsare100%RTtestedandthedetectionareais300mminthreedirections.10.2.5.4 罐底所有焊縫均采用真空箱法進行嚴密性試驗。10.2.5.4 Allweldsatthebottomofthetankaresubjectedtotightnesstestsusingavacuumb