输氢管道采用X80管线钢的设计建议

高强度管线钢常被用于长距离、大输量天然气管道输送，然而目前的输氢管道采用低强度管线钢，以避免氢脆的产生。为了探究大直径X80管线钢输送加压氢气的能力，对X80管线钢试样进行了拉伸、韧性、裂纹扩展和圆片破裂试验。根据试验结果，分析了输氢管道压力对试样缺陷临界尺寸的影响，从而对X80输氢管道的设计提出了建议。研究表明，在一定输送能量下，氢的运输成本可能比天然气高出数倍。此外，尽管低强度钢的氢脆敏感性更低，但使用高强度钢建造输氢管道比使用低强度钢可带来10%～40%的成本效益。

Recommendations on X80 Steel for the Design of Hydrogen Gas Transmission Pipelines

High strength pipeline steel is often used for long distance and large volume natural gas pipeline transportation，but at present，low strength pipeline steel is used in hydrogen pipeline to avoid hydrogen embrittlement.In order to explore the ability of large diameter X80 pipeline steel to transport pressurized hydrogen，tensile，toughness，crack propagation and disc rupture tests were carried out.According to the test results，the influence of hydrogen pipeline pressure on the critical size of the sample defect was analyzed，and some suggestions for the design of X80 hydrogen pipeline were put forward.Studies have shown that hydrogen transport costs can be several times higher than natural gas for a given amount of transport energy.In addition，although low strength steel is less sensitive to hydrogen embrittlement，construction of hydrogen transport pipelines using high strength steel can be 10 to 40 percent more cost-effective than using low strength steel.