钝边角度对直缝埋弧焊管的影响
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摘要
分析了直缝埋弧焊管合缝时的坡口形态,总结出钝边角度不合适是导致钝边合缝不严的根本原因;并给出钝边角度的计算公式,同时阐述了"噘嘴"对钝边合缝的影响,并就如何防止钝边合缝不严给出建议。分析认为:通过选择合适的钝边角度、适当调整"噘嘴"值和坡口尺寸,可改善预焊合缝不严的情况,使内焊产生气孔、烧穿的缺陷比例降低至5%以下。
The bevel shape of the SAWL pipe during joint-welding is analyzed. It is summarized that the improper root face angle is the root cause for the joint gap. Accordingly, the calculation formula for the root face angle is provided,while how the defective peaking influences the joint gap is discussed. Relevant suggestion is put forward for preventing occurrence of the joint gap. The analysis leads to such a conclusion that the joint gap as developed during pre-welding process is expected to be improved,and thus get the percentage of defects like porosity and burnthough, etc. as occurred during internal welding operation reduced to 5% or less by means of properly selecting root face angle,and appropriately adjusting the peaking value and the bevel dimensions as well.
The bevel shape of the SAWL pipe during joint-welding is analyzed. It is summarized that the improper root face angle is the root cause for the joint gap. Accordingly, the calculation formula for the root face angle is provided,while how the defective peaking influences the joint gap is discussed. Relevant suggestion is put forward for preventing occurrence of the joint gap. The analysis leads to such a conclusion that the joint gap as developed during pre-welding process is expected to be improved,and thus get the percentage of defects like porosity and burnthough, etc. as occurred during internal welding operation reduced to 5% or less by means of properly selecting root face angle,and appropriately adjusting the peaking value and the bevel dimensions as well.
引文
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[15]王立柱,魏旭,张婷婷,等.直缝埋弧焊管焊缝CO气孔产生的原因[J].焊管,2015,38(2):64-67.
[2]王宏勇.铣边机铣削效率的研究[J].江汉石油科技,2012,22(2):58-59,27.
[3]张远生,王占理,王晨,等.大直径焊管生产用扩径机简介[J].钢管,2000,29(6):40-42.
[4]王亚男.常见焊接接头缺陷分析[J].科技风,2011(6):144.
[5]张新洪,焦春鹏,王广智.焊接中常见的缺陷及预防措施[J].科技视界,2014(8):78.
[6]何有方.常见焊接缺陷的成因和预防措施[J].黑龙江科技信息,2014(5):56.
[7]李东,刘庆才.直缝焊管预焊缺陷对埋弧焊质量的影响及控制[J].焊管,2007,30(4):79-82.
[8]姜焕中.电弧焊及电渣焊[M].北京:机械工业出版社,1988.
[9]付晓红,姚海滨.常见工业管道焊接缺陷的分析及预防措施[J].聚氯乙烯,2000(1):49-52.
[10]API标准翻译出版委员会.API Spec 5L-2012管线直缝埋弧焊管规范[S].45版.北京:石油工业标准化研究所,2012.
[11]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 9711-2011石油天然气工业管线输送系统用直缝埋弧焊管[S].北京:中国标准出版社,2011.
[12]孟邹清.含缺陷压力管道承载能力分析[D].北京:北京化工大学,2006.
[13]李延丰,孙奇.JCOE直缝埋弧焊钢管生产线的研发和应用[J].焊管,2004,27(6):48-53.
[14]杨文涛.X80直缝焊管机械扩径有限元分析[D].石家庄:河北科技大学,2011.
[15]王立柱,魏旭,张婷婷,等.直缝埋弧焊管焊缝CO气孔产生的原因[J].焊管,2015,38(2):64-67.