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焊缝非匹配海管表面缺陷的安全评定
引用本文:夏静,霍立兴,白秉仁,曹军. 焊缝非匹配海管表面缺陷的安全评定[J]. 焊接学报, 2005, 26(9): 39-43
作者姓名:夏静  霍立兴  白秉仁  曹军
作者单位:1. 天津大学,材料科学与工程学院,天津,300072
2. 中国海洋石油工程股份有限公司,天津,300452
基金项目:国家自然科学基金资助项目(50375109);中国海洋石油工程股份有限公司资助项目.
摘    要:采用欧洲共同体提出的工业结构完整性评定方法(SINTAP),对给定裂纹尺寸和载荷条件下的EH36管线钢焊接接头焊趾处的表面裂纹进行评定:由拉伸试验得到的焊缝和母材的屈服强度比值大于10%,确定此次评定适用于SINTAP第二级评定,并给出二级评定图,计算结果表明,在裂纹深度α=2.2mm,在极限裂纹长度范围内变化的裂纹,其对应的评定点均落在评定曲线定义的范围内。这说明含有该范围内裂纹的缺陷是可以验收的。比较评定结果发现,裂纹深度方向上的变化较长度方向上的变化对评定结果产生的影响更明显。

关 键 词:焊缝 强度不匹配因子 失效评定图 安全评定
文章编号:0253-360X(2005)09-39-05
收稿时间:2004-09-14
修稿时间:2004-09-14

Safe assessment of surface flaw under mismatched weld in offshore pipeline
XIA Jing,HUO Li-xing,BAI Bing-ren and CAO Jun. Safe assessment of surface flaw under mismatched weld in offshore pipeline[J]. Transactions of The China Welding Institution, 2005, 26(9): 39-43
Authors:XIA Jing  HUO Li-xing  BAI Bing-ren  CAO Jun
Affiliation:XIA Jing~1,HUO Li-xing~1,BAI Bing-ren~2,CAO Jun~2
Abstract:According to the results of the CTOD(crack tip opening displacement) test and the SINTAP(structural integrity assessment procedure) suggested by Europe Community,the assessment of the surface flaw at the toe of a weld in pipeline was carried out with the given crack size and load.Based on the tensile test results of the base metal and weld metal,the assessment diagram of Level 2 was constructed.The assessment results indicate that the assessment points are within the region defined on the failure assessment diagrams using Level 2.Therefore,the structure containing definite crack can be accepted.The influence of the changes in the depth on the assessed results are greater than that in the length.
Keywords:weld metal  mismatched-strength factor  failure assessment diagram  safe assessment  
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