摘要
腐蚀导致在役管道强度降低,运营者必须确定当前腐蚀缺陷下管道是否可以继续服役,目前可采用的评价方法主要有B31G和API 579系列。介绍了两种评价方法的理论基础,根据各自的基本假设导出了相应的评价方法的评价公式,并对此进行了深入的对比分析,得出通常认为过于保守的B31G的保守性比API 579低的重要结论。建议在单一荷载和简单缺陷形状下,按B31G进行管道的剩余强度评价。
Operators should conform whether a pipeline in corroded flaw situation could maintain its service,for corrosion may leads to lower pipeline strength. Current assessment methodologies are ASME B31G and API 579 series. Theory foundation for remaining strength assessment methodology is presented and assessing formula for relative assessment methodology is educed based on individual basic assumption. Thus deep comparison is made for this purpose. Significant conclusion obtained is that API 579 is more conservative than ASME B31G. Authors suggest that under single load and simple flaw situations, remaining strength assessment should be carried out according to ASME B31G criterion.
出处
《油气储运》
CAS
北大核心
2008年第1期36-40,共5页
Oil & Gas Storage and Transportation
基金
国家自然科学基金50674077
CNPC中青年创新基金04E7049资助。
关键词
管道
剩余强度
腐蚀
评价
标准
pipeline, remaining strength, corrosion, assessment, standard
