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1、-Proposal on Carbon Steel Pipe Welding碳钢管道焊接工艺1 Technical description 技术特征Pipe material and size: 20* seamless steel pipe材质、规格： 20*无缝钢管 Work medium： water工作介质： 水Designed pressure：4/2设计压力： 4/2Work pressure：4/2工作压力：4/2Test pressure：6/2试验压力：6/22 Related documents to this proposal：本工艺编制依据：Technical spec
2、ification of F06B F06B技术文件 GB50236-98Field Equipment and Industrial Pipe Welding Work E*ecution and Acceptance Code国标GB50236-98现场设备、工业管道焊接工程施工及验收规 GB50235-97Industrial Metal Pipe Works Construction and Acceptance Code国标GB50235-97工业金属管道工程施工及验收规CEFOC Welding Technical Appraisal Report : HG3，HG2002-1 本
3、公司焊接工艺评定报告：HG3，HG2002-13 Welder焊工Welder should be certified in passing the Welding E*amination of Boiler Pressure Container and Pressure Pipe。焊工应具有锅炉压力容器压力管道焊工考试规则规定的焊工考试合格证。3.2 Welder should pass the qualification test by GB50236-98 Code to obtain work permit of the Contractor before starting the w
4、elding work of this project.焊工进入现场后，应按GB50236-98规定，先进展焊接实际操作考试合格。经总包方认可发证后，方能承担本工程的焊接工作。3.3 This technical proposal should be plied to during the welding work of this project焊工承担本工程的焊接工作中，应切实执行本焊接工艺。4 Welding work inspection 焊接检验4.1 Welding inspector should be fully acquainted with the F06B technica
5、l specification and both the international standards and this proposal 焊接检验人员应F06B技术文件及相关国标和本工艺。4.2 Inspect the pipe materials and welding materials in accordance with the relevant rules and sign the acceptance form。对管材焊材按规定进展检验、填表验收。4.3 Supervise the work of welder and help him to correct any defec
6、ts in work. To ensure the welding work quality, the inspector is powered to stop the work of any serious offender or those who refuse to correct defects in work。对焊工是否执行本工艺进展全面监视检查,对违反者进展教育帮助得以改正。对严重违反者或教育不改者有权令其停顿焊接工作。以确保焊接质量。4.4 Perform the inspection of welded work in line with Article 7 of this p
7、roposal做好本工艺第7条焊接后检查和管理工作。4.5 Coordinate with the representatives of Contractor and Supervisor to participate the inspection邀请和欢迎总包或监理方检验人员进展检查。5Preparation work before welding：焊前准备：5 .1 The pipe materials and welding materials are checked to be qualified products管材焊材必须具有符合规定的合格证明，并与实物核对无误。5.2 Pipe
8、material and size: 20* seamless steel pipe管材型号为20*无缝钢管，规格为 DN50至DN2505.3 Welding materials 焊材 Argon welding wire model and size: CO2 wire, 2.5mm2.0mm氩弧焊焊丝型号规格：CO2保护焊焊丝，2.5mm2.0mm Welding rod model and size: J422 3.2mm2.5mm电焊条规格型号规格：J422 3.2mm2.5mm Ce tungsten pole model and size: WCe-202.0mm铈钨极型号规格：
9、WCe-202.0mm5.3.4 Argon purity: 99.99。氩气纯度为99.99。5.4 Welding parts preparation 焊件准备 The positioning of welding point should ply to GB50235-97 and GB50236-98。焊接口的分布位置必须符合国标GB50235-97和GB50236-98规的规定。 The positioning of welding point should ply to GB50235-97 and GB50236-98。管道为V型坡口，对接接头、组对应符合图1要求：Note: T
10、he clearance of 3.54mm is for welding. When making spot welding, the clearance should be bigger注：间隙3.54mm为焊接时的数据，组对点固焊时，应适当大于此数据，以补收缩。图1.焊口组对数据 The groove of welding parts should be processed by grinding machine and cleaned within 10mm of both inside and outside surface from any oil, dust and burr焊件
11、坡口应用机械或磨光机加工。焊口组对前应将坡口及其外外表10mm围的油、垢、毛刺等清理干净。 Penetration welding must be applied in spot weld and 4 spots with 5mm of each should be welded on pipe with diameter 150mm and 6 spots with 5mm of each should be welded on pipe with diameter 150mm. 点固焊，根部必须焊透。不得有焊接缺陷。管径150mm为4点，每点长度为5mm。管径150mm为6点，每点长度为5
12、mm。The connection of pipe should keep straight in a*el and if necessary, make measurement as the flowing chart from 200mm to the center of welding point. The differential allowance is 1mm to pipe with diameter 100mm and 2mm to pipe with diameter 100mm. The differential allowance to the full length o
13、f pipe should be within 10mm and if e*ceeding that rate, cold correction should be applied instead of hot correction.。管子组对焊口时应保持其轴线平直。在不得以时，距焊口中心200mm处测量平直度如图2所示，管径100mm时允许偏差为1mm；管径100mm时允许偏差为2mm，但全长允许偏差均不大于10mm。万一超差时，只能用冷矫正，严禁加热矫正。图 2 管道对口平直度The pipes inside wall should keep smooth when making pipe
14、s joint. The differential allowance should be within 10% of the thickness of pipe wall. The non penetrated welding as A of the following chart is not allowed.管道组对应壁齐平，万不得以时，错边量不宜超过壁厚10，且大于2mm。焊接时不准有图3a之未焊透。A non penetration B penetrationa 未焊透 b 焊透图 3 焊件错边焊口 No pressure joint of pipes管道连接时，不得用强力组对焊口。
15、6 Welding：焊接6.1 The welding equipment must be functioning well.焊接设备性能完好.例如:交流弧焊机应有适当的空载电压;焊接电流调节灵活。氩弧焊机必须具备非接触引弧、提前送气、迟后关气和焊接电流衰减下破功能。6.2 Welding method and parameter：焊接方法及焊接工艺参数： When pipe diameter 50, use gas welding(o*ygen-acetylene welding)with the parameter as the following table:管径50mm采用气焊氧气乙炔焊接，焊接工艺如下：When pipe wall thickness3mm,groove must to be made, and the groove angle is 650，there must not be layer of o*ide on the surface of groove. 当管材壁厚3mm时，需倒焊接坡口，坡口角度为650，坡口外表不得有氧化层；When pipe
