摘要
针对密相/超临界CO_(2)管道止裂韧性预测是研究的热点和难点,且已有的止裂韧性预测模型尚不能准确预测密相/超临界CO_(2)管道的止裂韧性等问题,对现有模型进行对比分析。介绍了目前常用的BTC修正、DNV F104-2021以及ISO 27913—2016方法,同时采用此3种方法分别计算了外径323.9 mm密相/超临界CO_(2)管道止裂韧性,并对比分析计算结果。结果表明,现有的模型和计算方法都存在着数据不足、精准度较低的缺点,目前无法推荐特定的分析模型来评估密相/超临界CO_(2)管道中的延性裂纹扩展。DNV F104方法基于现有全部CO_(2)管道全尺寸爆破试验数据,其计算结果相对较为保守,对后续开展全尺寸试验的指导性更强。研究结果可为小口径密相/超临界CO_(2)管道的全尺寸爆破试验设计提供理论依据。
Prediction of the crack arrest toughness for dense phase/supercritical CO_(2)pipelines is a global research hotspot and challenge.Current existing models for predicting crack arrest toughness cannot provide precise predictions.Therefore,existing models were comparatively analyzed.Three commonly used models/methods,including the modified BTC model,DNV F104—2021 method,and ISO 27913—2016 method,were introduced.These three methods were applied respectively to calculate the crack arrest toughness for a dense phase/supercritical CO_(2)pipeline with an OD of 323.9 mm,and the calculation results were compared and analyzed.The results show that all the existing models and calculation methods exhibit limitations in terms of insufficient data and low accuracy,so,no specific analysis model can be recommended for evaluating ductile crack growth in dense phase/supercritical CO_(2)pipelines.The method from DNV F104 is based on all the available results from full-scale burst tests of CO_(2)pipeline.Its calculated results are relatively conservative,hence,more constructive for designing follow-up full-scale burst tests.The research results can provide theoretical support for full-scale burst test design of small-diameter dense phase/supercritical CO_(2)pipelines.
作者
欧阳欣
李鹤
闫锋
李胜男
池强
OUYANG Xin;LI He;YAN Feng;LI Shengnan;CHI Qiang(Pipe China Institute of Science and Technology,Langfang 065000,China;State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi′an 710077,China;Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State Market Regulation,CNPC Tubular Goods Research Institute,Xi′an 710077,China)
出处
《压力容器》
北大核心
2023年第9期62-68,共7页
Pressure Vessel Technology
基金
国家石油天然气管网集团有限公司项目(SSCC202107)
中石油集团公司基础研究和战略储备技术研究基金项目项目(2017D5008(2018Z-04))
陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-085)。
关键词
密相/超临界二氧化碳管道
止裂韧性
全尺寸爆破试验
dense phase/supercritical CO_(2)pipeline
crack arrest toughness
full-scale burst test
