碳钢管道焊接施工方案（中英文）

碳钢管道焊接施工方案（中英文）焊接施工方案WeldingConstructionMethod本工程共有碳钢管道7581m，碳钢管道焊接是本工程施工的重点，直接影响施工Carbonsteelpipinginthispthis,toguaranteequalityofthisproject.Codeforconstructionandacceptanceoffieldequipment,industrRadiographyandqualitygradeoffusionweld施工前根据该项目的材质，规格及焊接方法，提供合格Accordingtomaterial,specificationsandwieldingmethodinthisproject,itisnecessowner,andshallpa度计、湿度计及焊条烘烤、领用、发放及回收制度等。且派temperaturemeter,humiditymeter,rodsdryingrecord,issuingrecordandrecyclereguletc.specialpersons焊条选用符合国家及行业规范规定，焊接材料应提供焊材质量说明书,其提供的化materialshallhavequalitypitsvisualqualityshallbequalifiedwithoutdefBeforewelding,weldingrodandwiresh21Itisforbiddentohavepoisonousgasorcorrosivemediumirodshelvesshallbe300mmnotlessthan0℃,relativehumidityshallbenotmorethan60%.根据焊条二级库制度建立焊条入库、烘烤、发Afterrodsissued,theyshallbeputintoinsulbere-drying,andre-drytimesshallbenotover2焊缝的坡口形式和尺寸应符合设计文件和焊接作业指导书的规定。当设计无规定fnospecified,pipingbutt-weldVtypegroovecanb不同厚度的管道坡口及组对见下图：pipinggrooveandfit-upfordifferentthick\↓δ1\↓\i内壁尺寸不相等notequalforinsidesize外壁尺寸不相等notequalforoutsidesizenotequalforinsideandoutsidesizes\↓\\↓\30°≤51.5δ1内壁尺寸不相等的削薄thinningfornotequalinsidesizesinter,scoreshallberemovedfirstwhichwithhighhardenabilanddeformationofweldingjoints,fitting-upbyforcingisforbidden.morethan10%ofthickerwallpipe,andnoto焊接采用手工电弧焊。Manualelectricalarcweldinga境温度不得低于0℃。Protectionmeasuresforwindandrainingshallbetaken,whenwindvelocity>8m/s,electricalarcwelidingisforbidden.Andweldingenvironmentshallbenotlower0℃.checkedagain,aftertackweldingshallusesameweldingprocessasformalwelding,whichshalengthshallbe10-15mm,allocatingsymmetrically,notobeingoodcondition,shaconcentrationshallbereduced,tackweldingseamshallbweldsbothendsshal焊道加以预热。Everyweldshallbedoneatonetimeexceptspecialrequired,otherwise,weldingpassneedstobeheat焊件表面严禁电弧擦伤，且不得在焊件表面上引熄弧。Weldingpiecesurfaceisforbiddentobehurt,andnotallowabletocpitfully,multiwhenpasscourseswelding,jointsshallbeoffmetalinflat,andweldtowendsshallbeassameasbasemetal,whenremoremainingburrshallbegrindeduptobasemetalhafternodefectfound,shallwriteweldidentification,includingweldjointNo.andwelderNmetalandweldingmaterialshunqualifiedcannotbeusBeforewelding,shallcheckifcondition,ifweldinwithrelevantrequire定位焊缝焊完后，应清除渣皮进行检查，对发现的缺陷应去除后方可进行焊接。Aftertackweldingfinished,sha可进行下一层的焊接。Aftereverypassofmulti-passesfinished,inter-passshallbecleanedimmediately,anddovisualob对中断焊接的焊缝，继续焊接前应清理并检查，消除发现的缺陷后方可施焊。Forfremedyfounddefects,welding缝余高应满足规范要求。Afterwelding,shallremoveslagskin,spatterimmediatelyfromrequirementofstandardandcodes.接接头射线检测百分率及合格等级”执行。PipingNDTinspectionratioshallbeasperrelevantdesignrequirement,ifnodesigntestingshallbeaspercurrentGB<Pressure射线照相质量应达到Ⅲ级合格。AsperrelevantNDTspecification,itshallbereachGradeⅢ.无损检测应由第三方具有无损检测资格的单位进行。NDTshallbepthirdpartywithqualificationofNDT.location,returnrepairnotificatrepair,defectsshallberemediedfoForthelocationneedtorepairwelding,angulargrindercanbeusedtogrianalyzereason,makeoutmeathendorepairandmakereConstructionrecordshallbedoneduringweldingthefirstpartispipingisometricdrawing,the2ndpartisweldingrNDTreport,post-welding