二氧化碳气体保护焊接方案中英文+28129.docx

1、二氧化碳气体保护焊接方案中英文+28129Content1.Project overview工程概况 12.Fabrication reference编制依据 13.Construction features施工特点 14.Construction preparation施工准备 14.1.Preparation before welding焊前准备 14.2.Construction working conditions preparation施工作业条件准备 25.Construction process施工工艺 25.1Wedling process焊接工艺 25.2Root clean

2、ness process清根工艺 36.Construction attentions施工注意事项 47.Safety housekeeping安全文明施工 47.1.Safety assurance measures安全保证措施 47.2.Housekeeping文明施工 41.Project overview工程概况Completed, in order to efficiently shelf life for the engineering characteristics of large diameter carbon steel pipeline welding tasks, wi

3、th carbon dioxide gas shielded welding the bassoon weld when needed.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.Fabrication reference 编制依据1、The construction contract and the owners of the project construction plans本工程施工合同及业主提供的本工程施工图；2、The projects audited, approved the construction organ

4、ization design ;本工程经审核、批准的施工组织设计；3、The carbon dioxide gas shielded welding wireGB81102008二氧化碳气体保护焊用焊丝GB811020084、Specification for welding of steel structure buildings JGJ812002建筑钢结构焊接技术规程JGJ8120025、Gas welding, manual arc welding and gas-shielded arc welding weld groove basic form and sizeGB985.1-2

5、008.气焊、手工电弧焊及气体保护焊焊缝坡口的基本形式与尺寸GB985.1-2008.6、Code for acceptance of construction quality of steel structuresGB502052001钢结构工程施工质量验收规范GB5020520013.Construction features施工特点1、Weld appearance, weld molding no longer polished, uniform weld geometry.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、Less weld spatter, fl

6、ux-cored arc stabilizer added, stable arc burning droplet was drop wise even excessive when welding spatter few small particles and splashing, cooling faster, easier to clear.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、Weld shrinkage deformation is small, due to the welding h

7、eat input focus, small heat-affected zone, weld shrinkage deformation is small, small welding residual stress.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、High welding efficiency, high current density filaments automatic welding, determine its higher melting fill speed, thereby generating a high we

8、lding speed, and the automatic welding process and eliminates the need for frequent replacement of the manual welding electrode time.焊接效率高，细丝自动焊的高电流密度，决定了其较高的熔填速度，从而产生较高的焊接速度，且自动焊过程省去了手工焊中频繁更换焊条的时间。4.Construction preparation施工准备4.1.Preparation before welding焊前准备1. Welding groove焊接坡口：（1）The weld groo

9、ve of a V-shaped groove.焊缝坡口为V型坡口。（2）The welding groove shall be smooth, no cracks, delamination, slag and other defects dimensions conform to the pattern provisions.焊接坡口应平整，不得有裂纹、分层、夹渣等缺陷，尺寸符合图样规定。（3）Surface of the groove and on each side of 50mm before welding water, rust, oil, product residue and

10、 other harmful impurities in the welding should be cleaned.坡口表面及两侧各50mm焊前应将水、铁锈、油污、积渣和其它有害于焊接的杂质清除干净。（4）Weld group gap should be 3 1mm.焊缝组对间隙宜为31mm.2、Welding material焊接材料：CO2 gas shielded welding to 1.2 ER70S-6 wire, to protect the gas using CO2.CO2气体保护焊采用1.2的ER70S-6焊丝，保护气体采用CO2。3、Welding wire manag

11、ement 焊丝管理：（1）Starting welding wire must have factory certificate of chemical composition and mechanical properties within the warranty book must comply with the relevant provisions of the State.施焊中的焊丝，必须具有出厂合格证书，质保书内的化学成份及机械性能必须符合国家有关规定。（2）Wire into the box packaging, the official shall not be open

12、ed before welding to prevent moisture in the air.焊丝成盒包装，正式施焊前不得拆封，以免在空气中受潮。（3）The welding material designated persons responsible for the safekeeping, disbursement and recovery.焊接材料设专人负责保管、发放和回收。（4）The welding consumables library must be kept dry, relative humidity less than 60% of the coffers of no

13、t less than 10 C temperature.焊材库必须保持干燥，相对湿度不大于60%，库房内的温度不低于10。4、Welder certificate 焊工资格：The welder must hold a certificate issued by the Bureau of Labor Boiler and Pressure Vessel welders, eligible projects are as follows:焊工必须持有劳动局颁发的锅炉压力容器焊工考试合格证，合格项目如下：（1）Automatic gas shielded welding: RZ2-5、RZ2-

14、6、RZ2-7、RZ2-8.气体保护自动焊：RZ2-5、RZ2-6、RZ2-7、RZ2-8.（2）Semi automatic gas shielded welding: Rb2-5、Rb2-6、Rb2-7、Rb2-8.气体保护半自动焊：Rb2-5、Rb2-6、Rb2-7、Rb2-8.（3）Welder certification in welding steels should 16MnR.焊工合格证中施焊钢种应为16MnR.5、Welding equipment焊接设备：Gas protect welding shall adopt DC-400 power、LN-9GMA wire fe

15、eding machine and Bug-o auto car.气体保护焊选用DC-400电源、LN-9GMA送丝机及Bug-o自动小车。4.2.Construction working condition preparation施工作业条件准备1、The welding environment in any of the following conditions must adopt effective protective measures, otherwise stop welding:焊接环境出现下列任一情况时，必须采用有效防护措施，否则停止焊接：（1） Wind speed mor

16、e than 8m/s;风速大于8m/s；（2）Relative humidity more than 90%;相对湿度大于90%；（3）Rain and snow雨天及雪天；（4）Environment temperature under -5.环境温度在-5以下。2、The welding environment in any of the following conditions must adopt effective protective measures, otherwise stop welding:施焊应在坡口内引弧，禁止在非焊接部位引弧。3、Ground cable, wel

17、ding clamp, welding torch must be a good contact.地线、电缆线、焊钳、焊枪必须接触良好。4、The welded construction situation should be someone responsible for the record the ambient temperature and welded construction records.焊接施工情况应有专人负责记录环境温度及焊接施工记录。5.Construction process施工工艺5.1Welding process焊接工艺1、Welded construction

18、 must be strictly in accordance with the welding process and welding procedures.焊接施工必须严格按照焊接工艺和焊接程序进行。2、All butt weld welding weld width on each side over the edge of the groove 2mm appropriate.施焊时全部对接焊缝的焊缝宽度以每边超过坡口边缘2mm为宜。3、CO2 gas shielded welding larger pipeline, two welder must be symmetrical, a

19、nd keep pace.CO2气体保护焊焊接较大管线时，两台焊机必须对称进行，且保持同步。4、Welding process parameter: as shown in the following table焊接工艺参数：如下表所示Table 1 Typical of different diameter wire short circuit transfer welding parameters表1不同直径焊丝典型的短路过渡焊接工艺参数Welding wire diameter焊丝直径mm0.81.21.6Welding current焊接电流A100-110120-135140-180

20、Arc and voltage电弧电压V181920Table 2 The lower limit value and the arc voltage range in the current transition of the fine particles of the different diameter wire表2 不同直径焊丝细颗粒过渡的电流下限值及电弧电压范围Welding wire diameter焊丝直径(mm)1.21.62.03.04.0Welding current焊接电流(A)300400500650750Arc and voltage 电弧电压(V)34-45Tabl

21、e 3 1.6 welding wire CO2 semi-automatics welding commonly used process parameters表3 1.6焊丝CO2半自动焊常用工艺参数Droplet transfer mode熔滴过渡形式Welding current焊接电流AArc and voltage电弧电压VGas-flow rate气体流量(L/min)Application scope适用范围Short circuiting transfer短路过渡1602215-20All position welding全位置焊Fine particle transitio

22、n细颗粒过渡4003920Flat welding平焊5、Multilayer welding, each weld arc starting point should turn stagger more than 50mm, the terminal should crater fill, if any, the crater defects with grinding wheel clear.多层焊时，每层焊道引弧点应依次错开50mm以上，终端应将弧坑填满，如有弧坑缺陷，应用砂轮清除。6、Girth weld joints must be staggered and the longitu

23、dinal weld, the weld joint to be polished.环焊缝焊接时，接头必须和纵焊缝错开，焊缝接头要打磨。7、Each welding seam monolayer shall as far as possible once finished welding.每条焊缝单层应尽可能一次焊完。8、Welding of welding seam T-shaped cross-site shall longitudinal welding seam welding to the girth groove within the groove of the circular

24、seam welding meat, then polished clean, in order to remove the defects of the weld terminal.焊缝丁字交叉部位的焊接应将纵缝焊到环缝坡口内，然后将环缝坡口内的焊肉打磨干净，以去除焊缝终端缺陷。5.2Root cleanness process清根工艺1、Back seam for root cleanness, shall be used the angle grinder to clean up may not use carbon arc gouging and flame cutting.焊缝背面如

25、需清根，应采用角磨机进行清理，不得使用碳弧气刨和气割。2、The root cleanness excess of deposited metal shall be removed.清根应将多余的熔敷金属清除掉。3、After root cleanness, the shape of the groove, the width shall be consistent, root cleanness depth shall be appropriate, and be completely rid of the roots of defects, and if necessary, root c

26、leanness, the inspection of groove surface penetrant shall qualified before welding.清根后的坡口形状、宽窄应一致，清根深度应适当，并完全清除根部缺陷，如有必要清根后坡口表面经渗透探伤合格后方可施焊。6.Construction attentions施工注意事项1、Welding operations shall strictly enforce the welding procedure, to strengthen inter-layer Cleaner.焊接操作时应严格执行焊接工艺规程，加强层间除渣。2、A

27、 welding machine shall use a CO2 gas cylinder to ensure the supply of CO2.一台焊机宜使用一只CO2气瓶，以保证CO2供应。3、Strict control CO2 water content. New refillable CO2 cylinders shall be inverted cylinders 24h, prior to use to open the valve, which let go of stagnant water, shall be replaced with a new bottle when

28、 the bottle pressure is less than 2.0Mpa.严格控制CO2含水量。新充装的CO2气瓶宜将气瓶倒置24h，使用前打开阀门，放去其中的积水，当瓶内压力小于2.0Mpa时，应更换新瓶。4、When the ring seam and longitudinal seam weld at welding, welding operation should be particularly careful. Excess weld the meat end of the longitudinal seam planning to respond to the surface for grinding carefully, in order to achieve a smooth, continuous, easy girth weld.