| 压力钢管表面凹坑缺陷的安全评定 |
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| 引用本文： | 徐尊平,程南璞,雷斌隆,陈志谦.压力钢管表面凹坑缺陷的安全评定[J].焊接学报,2007,28(8):62-64. |
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| 作者姓名： | 徐尊平 程南璞 雷斌隆 陈志谦 |
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| 作者单位： | 1. 西南大学,材料科学与工程学院,重庆,400715
2. 西南交通大学,工程技术研究院,成都,610031 |
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| 基金项目： | 西南大学校科研和教改项目 |
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| 摘 要： | 基于有限元分析结果,采用国家标准GB/T19624<在用含缺陷压力容器安全评定>,对含表面凹坑缺陷的压力钢管进行了安全评定.根据凹坑缺陷不同的分布状况,分别采用了不同的方法进行评定.当相邻两凹坑缺陷边缘间的最小距离在20 mm范围内时,应采用常规评定的方法.结果表明,其对应的评定点落在评定曲线定义的安全范围内.这表明所评定的缺陷是可以接受的.当相邻两凹坑缺陷边缘间的最小距离大于20 mm时,可采用凹坑评定的方法.两种方法评定结果均表明,压力钢管壁上的表面凹坑缺陷是可以接受的.
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| 关 键 词： | 压力钢管 凹坑缺陷 失效评定图 安全评定 |
| 文章编号： | 0253-360X（2007）08-062-03 |
| 收稿时间： | 2006/9/28 0:00:00 |
| 修稿时间： | 2006-09-28 |
Safety assessment of surface pit in penstock |
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| XU Zunping,CHENG Nanpu,LEI Binlong and CHEN Zhiqian.Safety assessment of surface pit in penstock[J].Transactions of The China Welding Institution,2007,28(8):62-64. |
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| Authors: | XU Zunping CHENG Nanpu LEI Binlong and CHEN Zhiqian |
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| Affiliation: | Schoole of Materials Science and Engineering, Southwest University, Chongqing 400715, China,Schoole of Materials Science and Engineering, Southwest University, Chongqing 400715, China,Institute of Applied Engineering, Southwest Jiaotong University, Chengdu 610031, China and Schoole of Materials Science and Engineering, Southwest University, Chongqing 400715, China |
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| Abstract: | Based on the calculated results of finite element analysis and given the pit size, the criterion of safety assessment for in-service pressure vessels containing defects suggested by China was applied to assess the surface pit in penstock.The assessment wes carried out according to the CTOD (crack tip opeaning displacement) test result.Different assessment methods were used according to the pit distribution.The assessment results indicated that the assessment points are located within the safe region defined on the failure assessment diagrams.So the surface pit can be accepted. |
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| Keywords: | penstock pit failure assessment diagram safe assessment |
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