焊缝非匹配海底管线缺陷在不同标准下的安全评定研究  

Safe Assessment of Offshore Pipeline under Weld Mismatched Condition Based on Different Standards

作　　者：夏静[1] 霍立兴[1] 白秉仁 李小巍 曹军 

机构地区：[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

出　　处：《压力容器》2005年第7期4-7,共4页Pressure Vessel Technology

基　　金：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：本研究在给定裂纹尺寸和载荷条件下,根据CTOD(裂纹尖端张开位移)试验结果,先后采用英国标准协会提出的BS7910标准和欧共体提出的结构完整性评定方法SINTAP,针对EH36管线钢焊接接头焊趾处的表面裂纹进行评定。根据拉伸试验结果,建立了管线钢焊接接头的评定曲线。评定结果表明,应用BS7910标准进行评定时,各评定点不在评定曲线定义的范围内,说明该结构不能验收;而使用SINTAP方法评定,各评定点均在评定曲线定义的范围内,此时结构是可以接受的。本次研究充分说明SINTAP在强度不匹配方面要求更加详细,评定结果保守性相应地更低。According to the CTOD (Crack Tip Opening Displacement) test result and using the BS7910 produced by the British Standards Institution and the SINTAP (Structural Integrity Assessment Procedure) sponsored by the European Commission, given crack size and load, the assessment was carried out on surface flaw at the toe of weld in EH36 pipeline. Based on the tensile test results of base metal and weld metal, the failure assessment diagram were created. The assessment results based on BS7910 indicate that all the assessment points are out of the regions defined on the failure assessment diagrams, so the structure is not safe.While the assessment results based on SINTAP illuminate that all the assessment points are within the regions defined on the failure assessment diagrams, so the structure can be accepted. The research also shows that SINTAP requires more detailed input information and leads to less conservative results in the mismatched structure.

关 键 词：BS7910 SINTAP 裂纹张开位移 强度不匹配因子 失效评定图 安全评定 

分 类 号：TQ055[化学工程]