不同钢级腐蚀管道剩余强度分析方法的对比  

Comparison of residual strength analysis method of corroded pipeline of different steel grades

作　　者：崔铭伟[1] 曹学文[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555

出　　处：《油气储运》2012年第7期486-490,93,共5页Oil & Gas Storage and Transportation

基　　金：国家自然科学基金资助项目"音速喷嘴中气液两相流临界分配特性及相分离控制理论";No.51006123

摘　　要：以X42~X100钢级管道为研究对象,利用5种缺陷管道评价规范和非线性有限元方法计算具有腐蚀缺陷管道的失效压力。计算结果与试验数据对比分析表明：ASME B31G规范计算误差大且分布不稳定,修正的ASME B31G规范计算结果虽然有所改进,但计算误差仍然较大;BS7910、DNV-RP-F101和PCORRC规范更适合X60以上中高强度钢级管道的评价;与上述评价规范的计算结果相比,非线性有限元法在研究钢级范围内的计算误差小且分布稳定。Taking the pipeline of X42 and X100 steel grade as a research object, this paper calculates the failure pressure of corroded pipelines with five defected pipeline assessment codes ASME-B31G, modified ASME-B31G, DNV-RP-F101, BS7910, PCORRC and nonlinear finite element method. The comparison between calculated results and testing data shows that the calculation errors of ASME-B31G code are great and the distribution is not stable, and the calculated results of modified ASME-B31G code are improved in some ways, but the calculated error is still big; BS7910, DNV-RP-F101 and PCORRC codes are more appropriate for pipeline of steel grade of X60 and above, compared to calculated results of the said assessment codes, the nonlinear finite element method has small calculated error and stable distribution in range of steel grade under research.

关 键 词：钢级 管道 腐蚀缺陷 失效压力 评价规范 非线性有限元分析 

分 类 号：TE88[石油与天然气工程—油气储运工程] T-651[一般工业技术]