压力管道缺陷评价标准对比  

Comparison of defect evaluation criteria for pressure pipeline

作　　者：李一庆[1] 李树喜[2] 胡景克[3] 王绍华[2] 

机构地区：[1]中国石化广东石油分公司,广东广州510620 [2]中国石油管道公司锦州输油气分公司,辽宁锦州121001 [3]中国石化管道储运公司,江苏徐州221008

出　　处：《油气储运》2013年第6期638-642,共5页Oil & Gas Storage and Transportation

摘　　要：分析了国际常用的新旧R6、EPRI和ASME IWB-3650压力管道评价标准方法的基础理论,介绍了其适用范围及优缺点。针对管道不同裂纹情况,提出了使用这4种标准进行评价的相关建议:针对一般裂纹问题,采用失效评价图法进行评价;对非穿透裂纹管道,应直接计算其塑性极限载荷和应力强度因子,并以裂纹起裂或塑性失稳作为判定管道失效的准则;如果无法确定裂纹管道的塑性极限载荷值,建议采用断裂力学的理论和相关计算进行评价;对于无法得到塑性极限载荷计算公式的裂纹情况,可采用有限元法计算其数值结果。The paper reviews the basic theories, applicability, advantages and disadvantages of previous and latest R6, EPRI and ASME IWB-3650 pressure pipeline evaluation criteria. For their applicability, corresponding suggestions are presented in view of different pipeline cracks. As for simple cracks, failure evaluation maps could be used. For pipelines with non-penetrated cracks, the plastic limit load and stress intensity factor should be calculated directly and crack initiation or plastic instability should be used as a criterion of pipeline failure. If the plastic limit load of a pipeline with cracks could not be determined, fracture mechanics theory and calculation would be recommended. If the plastic limit load could not be estimated with formulas, the approach of finite element might be used to calculate the numerical results. （2 Figures, 10 References）

关 键 词：压力管道 管道裂纹 缺陷评价 标准 

分 类 号：TE832[石油与天然气工程—油气储运工程]