拱頂冷熱熔鹽儲(chǔ)罐焊接施工焊接檢驗(yàn)規(guī)定

1、拱頂冷熱熔鹽儲(chǔ)罐焊接施工焊接檢驗(yàn)規(guī)定10Weldinginspection10.1焊縫外觀質(zhì)量檢驗(yàn)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(yīng)圓滑過(guò)渡，焊角高度符合設(shè)計(jì)規(guī)定，對(duì)接焊縫寬度蓋過(guò)每邊蓋過(guò)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(duì)接焊縫的咬邊深度不得大于0.5mm,咬邊的連續(xù)長(zhǎng)度不得大于100mm焊縫兩側(cè)咬邊總長(zhǎng)度不超過(guò)該焊縫總長(zhǎng)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(yīng)符合設(shè)計(jì)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(duì)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(zhǎng)度不得大于100mm凹陷的總長(zhǎng)度，不得大于該焊縫長(zhǎng)度的10%底圈罐壁板縱焊縫、邊緣板對(duì)接焊縫不允許存在咬邊。10.1.4Theverticalbuttweldsofthetankwallshouldnotbe

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

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

7、部門頒發(fā)的并與其工作相適應(yīng)的資格證書(shū)。10.2.1Thepersonnelengagedinnon-destructivetestingmustholdthequalificationcertificatesthatareissuedbynationalauthoritiesandareintermsofrelatedjobs.邊緣板的對(duì)接焊縫應(yīng)進(jìn)行滲透檢測(cè)，且對(duì)接焊縫的外端300mm進(jìn)行射線檢測(cè)。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(jìn)行滲10.2.3 thepenetrationinspectionaftertheweldingofthebottomplateofthebottomplateofthebottomplateofthebottomplateshallbecheckedfor200mminthreedirections.罐底板所有焊縫均進(jìn)行100%超聲和100%滲透檢測(cè)。10.2.4 TankBottomAllweldsare100%Ultrasonicand100%Penetrant.罐壁焊縫的無(wú)損檢測(cè)：10.2.5 Nondestructivetes

9、tingofweldsintankwalls:10.2.5.1 壁厚25mm的縱向焊縫應(yīng)進(jìn)行100%的射線檢測(cè)；10.2.5.1 longitudinalweldswithwallthickness>25mmshallbetestedfor100%10.2.5.2 底圈罐壁42(44)mm*67m對(duì)接焊縫、42(44)mm*34m環(huán)向焊縫、34mm*25mi環(huán)向焊縫100%RT檢測(cè)。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(cè)，檢測(cè)區(qū)域?yàn)槿齻€(gè)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(jìn)行嚴(yán)密性試驗(yàn)。10.2.5.4 Allweldsatthebottomofthetankaresubjectedtotightnesstestsusingavacuumb