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Proposal on Carbon Steel Pipe Welding
碳钢管道焊接工艺
1 Technical description 技术特征
1.1 Pipe material and size: 20# seamless steel pipe
材质、规格： 20#无缝钢管 1.2 Work medium： water
工作介质： 水
1.3 Designed pressure：4㎏/㎝2
设计压力： 4㎏/㎝2 1.4 Work pressure：4㎏/㎝2
工作压力：4㎏/㎝2
1.5 Test pressure：6㎏/㎝2
试验压力：6㎏/㎝2
2 Related documents to this proposal：
本工艺编制依据：
2.1 Technical specification of F06B
F06B技术文件
2.2 GB50236-98《Field Equipment and Industrial Pipe Welding Work Execution 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》 2.3
GB50235-97《Industrial Metal Pipe Works Construction and
Acceptance Code》
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国标GB50235-97《工业金属管道工程施工及验收规》
2.4 CEFOC Welding Technical Appraisal Report : HG3，HG2002-1 本公司焊接工艺评定报告：HG3，HG2002-1 3 Welder焊工
3.1 Welder should be certified in passing the Welding Examination 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 welding work of this project.
焊工进入现场后，应按GB50236-98规定，先进行焊接实际操作考试合格。经总包方认可发证后，方能承担本项目的焊接工作。 3.3 This technical proposal should be complied to during the welding work of this project
焊工承担本项目的焊接工作中，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 technical 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
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accordance with the relevant rules and sign the acceptance form。
对管材焊材按规定进行检验、填表验收。
4.3 Supervise the work of welder and help him to correct any defects 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行全面监督检查,对违反者进行教育帮助得以改正。对严重违反者或教育不改者有权令其停止焊接工作。以确保焊接质量。
4.4 Perform the inspection of welded work in line with Article 7 of this proposal
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行检查。 5 Preparation 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 material and size: 20# seamless steel pipe
管材型号为20#无缝钢管，规格为 DN50至DN250
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5.3 Welding materials 焊材
5.3.1 Argon welding wire model and size: CO2 wire, ∮2.5mm ∮2.0mm
氩弧焊焊丝型号规格：CO2保护焊焊丝，∮2.5mm ∮2.0mm 5.3.2 Welding rod model and size: J422 ∮3.2mm ∮2.5mm
电焊条规格型号规格：J422 ∮3.2mm ∮2.5mm 5.3.3 Ce tungsten pole model and size: WCe-20∮2.0mm
铈钨极型号规格：WCe-20∮2.0mm 5.3.4 Argon purity: 99.99％。
氩气纯度为99.99％。
5.4 Welding parts preparation 焊件准备
5.4.1 The positioning of welding point should comply 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。
5.4.2 The positioning of welding point should comply 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： - . -考试资料- - --
Note: The clearance of 3.5～4mm is for welding. When making
spot welding, the clearance should be bigger 注：间隙3.5～4mm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
5.4.3 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
焊件坡口应用机械或磨光机加工。焊口组对前应将坡口及其外表面10mm围的油、垢、毛刺等清理干净。
5.4.4 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5mm。 5.4.5 The connection of pipe should keep straight in axel 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 of pipe should be within 10mm and if exceeding that rate, cold correction
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碳钢管道焊接工艺 - 图文
