A method for predicting remaining life of pipeline with dispersion-type corrosion damage

doi:10.7623/syxb200601026

Editorial office of ACTA PETROLEI SINICA ›› 2006, Vol. 27 ›› Issue (1): 119-123.DOI: 10.7623/syxb200601026

• Petroleum Engineering • Previous Articles Next Articles

A method for predicting remaining life of pipeline with dispersion-type corrosion damage

Zhao Xinwei¹, Luo Jinheng^1,2, Zheng Maosheng², Li Helin¹, Zhang Hua¹

1. Tubular Goods Research Center of CNPC, Xi'an 710065, China;
2. School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2005-04-26 Revised:2005-07-11 Online:2006-01-25 Published:2010-05-21

弥散型腐蚀损伤管道剩余寿命预测方法

赵新伟¹, 罗金恒^1,2, 郑茂盛², 李鹤林¹, 张华¹

1. 中国石油天然气集团公司管材研究所陕西西安 710065;
2. 西安交通大学材料科学与工程学院陕西西安 710049

作者简介:赵新伟,男,1969年11月生,2004年获西安交通大学博士学位,现任中国石油天然气集团公司管材研究所研究开发中心主任,高级工程师.E-mail:Zhaoxw@tgrc.org
基金资助:
中国石油天然气集团公司中青年创新基金项目(04E7050)资助.

Abstract

Abstract: The pitting corrosion damage of pipeline was considered as uniform hole-type damage based on the damage theory.The degradation regularity of apparent yield strength and elastic modulus of damaged pipeline steel was investigated by tension test of specimen with artificial holes.On the basis of diluted solution theory,a model for describing corrosion process of the harmful media within the pipeline and the corrosion damage distribution along the radial direction of the pipeline was derived.The variation regularity of the mechanical properties of corroded pipeline steel with time was studied by corrosion test.Combining the above damage rules with the corresponding variation analyses of stress states and strength,a new approach to predict the remaining life of pitting corrosion damaged pipeline was proposed.

Key words: oil and gas pipeline, pitting corrosion, damage theory, apparent mechanical properties, remaining life, prediction method

摘要： 基于损伤理论,将管壁点腐蚀损伤层材料视作孔洞型均匀损伤材料,通过模拟多孔材料拉伸实验,研究了孔洞型损伤管线钢表观弹性模量和屈服强度退化规律.根据稀溶液理论,导出了腐蚀损伤沿壁厚方向的分布模型.通过腐蚀实验,研究了腐蚀损伤管线钢力学性能随时间的变化规律.根据腐蚀损伤规律,并结合相应的管道应力和强度分析,提出了一种新的点腐蚀弥散损伤管道剩余寿命的预测方法.

关键词: 油气管道;点腐蚀;损伤理论;表观力学性能;剩余寿命;预测方法

CLC Number:

TE973

Zhao Xinwei, Luo Jinheng, Zheng Maosheng, Li Helin, Zhang Hua. A method for predicting remaining life of pipeline with dispersion-type corrosion damage[J]. Editorial office of ACTA PETROLEI SINICA, 2006, 27(1): 119-123.

赵新伟, 罗金恒, 郑茂盛, 李鹤林, 张华. 弥散型腐蚀损伤管道剩余寿命预测方法[J]. 石油学报, 2006, 27(1): 119-123.

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A method for predicting remaining life of pipeline with dispersion-type corrosion damage

弥散型腐蚀损伤管道剩余寿命预测方法

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