What is it about?
This paper introduces a novel approach to understanding the effects of hydrogen embrittlement on API 5L steel pipelines under cyclic pressure loading. The proposed procedure for predicting fatigue crack growth of pipelines transporting hydrogen with cyclic pressure loading and exposed to hydrogen embrittlement represents a practical industrial tool for improving the effectiveness of the pipeline preventive maintenance transporting hydrogen
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Why is it important?
The study uniquely considers real-world operating conditions by incorporating periodic demand variations at consumption nodes into the pressure profile. The results show that the cyclic pressure has an important effect on the integrity assessment of the API 5L X52 pipeline, especially when the initial crack is developed due to hydrogen embrittlement.
Perspectives
The numerical modeling application to predict fatigue crack evolution and estimate the remaining service life based on the ASME B31.12 and ASME BPVC Section VIII standards represents a significant advancement in pipeline integrity management. By implementation of non-destructive testing, the presence of dangerous initial semi-elliptical cracks, and their depth ratio can be effectively and timely detected and measured too.
Professor Milos B. Djukic
University of Belgrade, Faculty of Mechanical Engineering
Read the Original
This page is a summary of: Hydrogen embrittlement effects on remaining life and fatigue crack growth rate in API 5L X52 steel pipelines under cyclic pressure loading, Engineering Failure Analysis, December 2024, Elsevier,
DOI: 10.1016/j.engfailanal.2024.108917.
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