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[1]吴宏　周剑琴.国内大口径、高钢级管道焊接及焊缝检测技术[J].油气储运,2016,35(预出版):1-7.
　WU Hong,ZHOU Jianqin.Welding and weld testing technology for large-diameter high-grade pipelines in China[J].Oil & Gas Storage and Transportation,2016,35(预出版):1-7.
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国内大口径、高钢级管道焊接及焊缝检测技术

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 35 期数: 2016年预出版期 页码: 1-7 栏目: 出版日期: 2016-12-25
Title:
Welding and weld testing technology for large-diameter high-grade pipelines in China
作者:

吴宏　周剑琴

Author(s):

WU Hong;  ZHOU Jianqin

关键词:

高钢级管道; 大口径; 半自动焊; 全自动焊; 焊缝质量; 焊接工效; 自动超声波检测

Keywords:
分类号:
TE832
文献标志码:
A
摘要:
针对国内大口径、高钢级管道普遍运用半自动焊技术而逐渐暴露出影响焊接质量的问题，研究了大口径、高钢级管道的焊接技术及焊缝检测技术。分析了半自动焊与全自动焊对大口径、高钢级管道环焊缝质量的影响因素，并通过西气东输高钢级管道焊口泄漏事故失效分析报告、管材低温冲击试验与金相分析报告及环焊缝焊接工艺试验，验证了影响焊接质量的因素；对比了半自动焊与全自动焊经济性，得到了焊接机组成本与完成工作量的关系；研究了自动超声波检测技术的可靠性，提出了国内全自动焊焊缝检测的方法。由此可得：对于大口径、高钢级管道，全自动焊能够有效避免半自动焊环焊缝低温冲击功值偏低呈离散的问题，具有质量可靠、工效提升的优势，但从经济性角度考虑，只有当全自动焊工作量大于经济焊接工作量时，全自动焊的经济效益才会超过半自动焊；全自动焊焊缝质量的检验可采用自动超声波检测技术实现。因此，建议应在大口径、高钢级管道施工中，全面推行全自动焊技术方法。

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更新日期/Last Update: 2016-12-09