熔盐储罐壁板的焊接工艺.doc

熔盐储罐壁板的焊接工艺7Weldingoftankshell熔盐储罐壁板安装采用倒装法进行，即先安装顶圈壁板及拱顶，然后壁板依次向下安装焊接，最后安装焊接底圈壁板及大脚焊缝根据这种安装方法，壁板立缝、环缝采取先焊外侧，然后内侧搭设临时操作平台进行焊缝清根和焊接工作立缝内外侧均采用气电立焊，环缝外侧采用自动焊，内侧手工电弧焊7.1顶圈壁板的焊接7.1Weldingoftanktopshell顶圈壁板组对完毕后先进行纵缝焊接，焊接方法采用气电立焊，先焊接大坡口，后焊小坡口，然后利用内侧操作平台对焊缝进行清根，清根可采用磨光机或碳弧气刨，但刨后应用角向磨光机将刨槽内的渗碳层和杂物打磨干净10mm和16mm壁板可一次焊接成型）为了便于环缝的装配，各条纵缝的上下端各留出150mm暂不焊接，待环缝装配后再焊接Afterthetopringwallboardisassembled,verticalseamweldingshallbeperformedfirst,withweldingmethodofmanualwelding,ifthedirectionofthebevelisattheoutsideofthewallboard,twobackingweldingoutsidethewallboardshallbecarriedoutfirst(ifinside,theweldingsequencewouldbeopposite),andthencleartheweldrootattheback,whichcanusegrinderorcarbonarcgouging,butaftergouging,anglegrindershallbeusedtocleanthecarburizedlayeranddebris.(Theshellplateof10mmand16mmcanbeweldedatoncetime.)Inordertofacilitatetheassemblyofcircularseam,150mmshallbesetattheupperandlowerendsofeachlongitudinalseam,andweldedafterthecircularseamassembly.7.2其余各层壁板的焊接7.2Theweldingtheremainingwallboardofeachlayer721其余各层壁板焊接先焊纵缝，再焊环缝。

纵缝焊接前，先焊上定位龙门板，然后拆下纵缝组对卡具，16mm及以上的壁板纵缝为x型坡口，其余v型坡口焊接时，先焊外侧，然后内侧清根焊接7.2.1Fortheweldingofremaininglayersofwallboards,longitudinalseamshallbeweldedfirst,andthencircularseam,beforelongitudinalseamwelding,thepositioningbatterboardshallbewelded,andthenthelongitudinalseamassemblyfixturesshallberemoved.16mmandabovewallboardlongitudinalseamisx-shapebevelandtherestisv-shapebevel.Whenwelding,theoutsideshallbeweldedbeforeinside.壁板环缝的焊接，采用埋弧自动焊和手工焊，焊接程序：先埋弧自动焊焊接外侧，多台埋弧焊机均布同时沿同一方向进行施焊然后反面进行清根，清根方法同前然后用手工焊焊接内侧焊缝7.2.2Weldingprocedure:firsttheoutsideweldwiththeSAW,thencleantherootattheback,withthesamemethodstatedabove.ThenweldinsidewithSMAW.罐壁板厚度自下而上分别为8=42、34、25、16、10mm共计5圈，采用电动葫芦提升倒装法组装。

拆除组装用的工卡具时，不得损伤母材如有损伤，应按标准进行修补钢板表面的焊疤应打磨平整8=42,34,25,16and10mmwith5circlesintotal,thetankshellsareinstalledbymeansofelectrichoistliftingupside-downmethod.Thetoolingandclampshallbedisassembledwithoutwearingthebasematerial.Ifthereisanydamage,itshallberepairedasperthestandards.Thecraterofthesteelplatesurfaceshallbegroundtoasmooth,uniformfinish.接应先焊纵缝，在上下纵缝全部焊接完后，再焊环缝环缝焊接时，应采用数台焊机均布施焊先焊接外侧焊缝，并用电弧气刨清根后，再用手工电弧焊进行内侧焊缝的焊接7.2.4Whentheshellisassembled,clearanceshallconformtotheweldingprocessrequirements.Whenthetankshelliswelded,longitudinalseamshallbeweldedfirstly,andcircumferentialseamshallbeweldedafterthetopandthebottomcircumferentialseamsfinishwelding.Whenthecircumferentialseamiswelded,severalsetsofweldingmachineshallbeusedtowelduniformly.Theouterweldingseamswillbeweldedatfirst,thebackchippingwillbedonebymeansofelectricarcgougingandthentheinnerweldingseamswillbeweldedwithSMAW.为防止焊缝角变形，除应严格执行焊接工艺外，尚应设置必要工装，做好防变形措施。