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1、Content目录1.Projectoverview工程概况12.Fabricationreference编制依据13.Constructionfeatures施工特点14.Constructionpreparation施工准备14.1.Preparationbeforewelding焊前准备14.2.Constructionworkingconditionspreparation施工作业条件准备25.Constructionprocess施工工艺25.1．Wedlingprocess焊接工艺25.2．Rootcleannessprocess清根工艺
2、36.Constructionattentions施工注意事项47.Safetyhousekeeping安全文明施工47.1.Safetyassurancemeasures安全保证措施47.2.Housekeeping文明施工491.Projectoverview工程概况Completed,inordertoefficientlyshelflifefortheengineeringcharacteristicsoflargediametercarbonsteelpipelineweldingtasks,withcarbondioxidegasshie
3、ldedweldingthebassoonweldwhenneeded.针对本工程的碳钢管线直径大的特点，为了高效保质完成焊接任务，焊接大管焊缝时需要用二氧化碳气体进行保护焊接。2.Fabricationreference编制依据1、Theconstructioncontractandtheownersoftheprojectconstructionplans本工程施工合同及业主提供的本工程施工图；2、Theprojectsaudited,approvedtheconstructionorganizationdesign";本工程经审核、批准的《施工
4、组织设计》；3、《Thecarbondioxidegasshieldedweldingwire》GB8110—2008《二氧化碳气体保护焊用焊丝》GB8110—20084、《Specificationforweldingofsteelstructurebuildings》JGJ81—2002《建筑钢结构焊接技术规程》JGJ81—20025、《Gaswelding,manualarcweldingandgas-shieldedarcweldingweldgroovebasicformandsize》GB985.1-2008.《气焊、手工电弧焊及气体保护
5、焊焊缝坡口的基本形式与尺寸》GB985.1-2008.6、《Codeforacceptanceofconstructionqualityofsteelstructures》GB50205—2001《钢结构工程施工质量验收规范》GB50205—20013.Constructionfeatures施工特点1、Weldappearance,weldmoldingnolongerpolished,uniformweldgeometry.焊缝成型美观，焊缝焊接成型后无需再打磨处理，焊缝几何尺寸均匀一致。2、Lessweldspatter,flux-coreda
6、rcstabilizeradded,stablearcburningdropletwasdropwiseevenexcessivewhenweldingspatterfewsmallparticlesandsplashing,9coolingfaster,easiertoclear.焊接飞溅少，药芯焊丝在其中加入了稳弧剂，电弧燃烧稳定，熔滴呈滴状均匀过度，故焊接时飞溅很少，且飞溅颗粒细小，冷却速度快，清除较容易。3、Weldshrinkagedeformationissmall,duetotheweldingheatinputfocus,smallh
7、eat-affectedzone,weldshrinkagedeformationissmall,smallweldingresidualstress.焊缝收缩变形小，由于其焊接热量输入集中，热影响区小，因此焊接收缩变形小，焊接残余应力小。4、Highweldingefficiency,highcurrentdensityfilamentsautomaticwelding,determineitshighermeltingfillspeed,therebygeneratingahighweldingspeed,andtheautomaticweldi
8、ngprocessandeliminatestheneedforfrequentreplacementoft
