熔鹽儲罐壁板的焊接工藝

1、熔鹽儲罐壁板的焊接工藝7Weldingoftankshell熔鹽儲罐壁板安裝采用倒裝法進(jìn)行，即先安裝頂圈壁板及拱頂，然后壁板依次向下安裝焊接，最后安裝焊接底圈壁板及大腳焊縫。根據(jù)這種安裝方法，壁板立縫、環(huán)縫采取先焊外側(cè)，然后內(nèi)側(cè)搭設(shè)臨時操作平臺進(jìn)行焊縫清根和焊接工作。立縫內(nèi)外側(cè)均采用氣電立焊，環(huán)縫外側(cè)采用自動焊，內(nèi)側(cè)手工電弧焊。7.1頂圈壁板的焊接7.1Weldingoftanktopshell頂圈壁板組對完畢后先進(jìn)行縱縫焊接，焊接方法采用氣電立焊，先焊接大坡口，后焊小坡口，然后利用內(nèi)側(cè)操作平臺對焊縫進(jìn)行清根，清根可采用磨光機或碳弧氣刨，但刨后應(yīng)用角向磨光機將刨槽內(nèi)的滲碳層和雜物打磨干凈。（1

2、0mm和16mm壁板可一次焊接成型）為了便于環(huán)縫的裝配，各條縱縫的上下端各留出150mm暫不焊接，待環(huán)縫裝配后再焊接。Afterthetopringwallboardisassembled,verticalseamweldingshallbeperformedfirst,withweldingmethodofmanualwelding,ifthedirectionofthebevelisattheoutsideofthewallboard,twobackingweldingoutsidethewallboardshallbecarriedoutfirst(ifinside,thewelding

3、sequencewouldbeopposite),andthencleartheweldrootattheback,whichcanusegrinderorcarbonarcgouging,butaftergouging,anglegrindershallbeusedtocleanthecarburizedlayeranddebris.(Theshellplateof10mmand16mmcanbeweldedatoncetime.)Inordertofacilitatetheassemblyofcircularseam,150mmshallbesetattheupperandlowerend

4、sofeachlongitudinalseam,andweldedafterthecircularseamassembly.7.2其余各層壁板的焊接7.2Theweldingtheremainingwallboardofeachlayer721其余各層壁板焊接先焊縱縫，再焊環(huán)縫?？v縫焊接前，先焊上定位龍門板，然后拆下縱縫組對卡具，16mm及以上的壁板縱縫為x型坡口，其余v型坡口。焊接時，先焊外側(cè)，然后內(nèi)側(cè)清根焊接。7.2.1Fortheweldingofremaininglayersofwallboards,longitudinalseamshallbeweldedfirst,andthenc

5、ircularseam,beforelongitudinalseamwelding,thepositioningbatterboardshallbewelded,andthenthelongitudinalseamassemblyfixturesshallberemoved.16mmandabovewallboardlongitudinalseamisx-shapebevelandtherestisv-shapebevel.Whenwelding,theoutsideshallbeweldedbeforeinside.壁板環(huán)縫的焊接，采用埋弧自動焊和手工焊，焊接程序：先埋弧自動焊焊接外側(cè)，多臺

6、埋弧焊機均布同時沿同一方向進(jìn)行施焊。然后反面進(jìn)行清根，清根方法同前。然后用手工焊焊接內(nèi)側(cè)焊縫7.2.2Weldingprocedure:firsttheoutsideweldwiththeSAW,thencleantherootattheback,withthesamemethodstatedabove.ThenweldinsidewithSMAW.罐壁板厚度自下而上分別為8=42、34、25、16、10mm共計5圈，采用電動葫蘆提升倒裝法組裝。拆除組裝用的工卡具時，不得損傷母材。如有損傷，應(yīng)按標(biāo)準(zhǔn)進(jìn)行修補。鋼板表面的焊疤應(yīng)打磨平整。8=42,34,25,16and10mmwith5circl

7、esintotal,thetankshellsareinstalledbymeansofelectrichoistliftingupside-downmethod.Thetoolingandclampshallbedisassembledwithoutwearingthebasematerial.Ifthereisanydamage,itshallberepairedasperthestandards.Thecraterofthesteelplatesurfaceshallbegroundtoasmooth,uniformfinish.接應(yīng)先焊縱縫，在上下縱縫全部焊接完后，再焊環(huán)縫。環(huán)縫焊接時

8、，應(yīng)采用數(shù)臺焊機均布施焊。先焊接外側(cè)焊縫，并用電弧氣刨清根后，再用手工電弧焊進(jìn)行內(nèi)側(cè)焊縫的焊接。7.2.4Whentheshellisassembled,clearanceshallconformtotheweldingprocessrequirements.Whenthetankshelliswelded,longitudinalseamshallbeweldedfirstly,andcircumferentialseamshallbeweldedafterthetopandthebottomcircumferentialseamsfinishwelding.Whenthecircumferentialseamiswelded,severalsetsofweldingmachineshallbeusedtowelduniformly.Theouterweldingseamswillbeweldedatfirst,thebac