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Abstract: Widespread use of green hydrogen is a critical route to achieving a carbon-neutral society, but it cannot be accomplished without extensive hydrogen distribution. hydrogen pipelines are the most energy-efficient approach to transporting hydrogen in areas with high, long-term demand for hydrogen. A well-known fact is that the properties of hydrogen differ from those of natural gas, which leads to significant variations in the pipeline transportation process. In addition, hydrogen can degrade the mechanical properties of steels, thereby affecting pipeline integrity. This situation has led to two inevitable key challenges in the current development of hydrogen-pipeline technology: economic viability and safety. Based on a review of the current state of hydrogen pipelines, including material compatibility with hydrogen, design methods, process operations, safety monitoring, and standards, this paper highlights key knowledge gaps in gaseous hydrogen pipelines. These gaps include the utilisation of high-strength materials for hydrogen pipelines, design of high-quality hydrogen pipelines, determination of hydrogen velocity, and repurposing of existing natural-gas pipelines. This review aims to identify the challenges in current hydrogen pipelines development and provide valuable suggestions for future research.

氢气管道发展现状及挑战：从材料、设计以及完整性角度

作者：花争立，高睿哲，邢百汇，尚娟，郑津洋，彭文珠，赵益明
机构：浙江大学，能源工程学院，特种装备研究所，中国杭州，310027
概要：本文回顾了氢气管道及天然气管道掺氢的发展现状。本文涵盖材料的氢相容性、氢气管道的设计方法、气体输送工艺、管道完整性评价与在线检测技术，以及天然气管道掺氢的评价方法。在此基础上，进一步指出了氢气管道建设过程中面临的一些挑战：1.氢气管道中高强钢的应用；2.高质量的氢气管道设计方法；3.管道中氢气流速的选择；4.现有天然气管道掺评价方法。最后，对未来发展方向提出了一些建议。

关键词：氢气管道；氢脆；标准；管道设计；氢气流速

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