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Ten years of rapid development in chemical engineering technology; praise for the prosperous and strong China. This is just a starting point to encourage more participation from everyone. Haichuan becomes even better with your involvement – we welcome all to join in the forum discussions. Be careful with fire risks as the heat increases in July. ---------------------------------------------On July 14, 2023, Baoji Steel Pipe Company successfully carried out China’s first full-scale test of long-duration high-pressure pipelines with a high hydrogen content. All test parameters met the relevant technical requirements, indicating that China National Petroleum Corporation has reached an advanced level in the development of such pipelines as well as in the assessment of their reliability under high-pressure and high-hydrogen conditions. In recent years, as the volume of hydrogen transported through pipelines has increased, along with rising transmission pressures and hydrogen mixing ratios, the market has placed higher demands on the material properties and welding performance of steel pipes used for hydrogen transportation. At present, domestic pipes are mainly used for transportation with low pressure and a high hydrogen mixing ratio, or high pressure and a low hydrogen mixing ratio, showing a significant gap compared to those abroad. In March this year, Baoji Steel Pipe took advantage of the technical and talent strengths of its **Petroleum and Natural Gas Pipeline Engineering Technology Research Center. By using newly developed straight-seam high-frequency welded pipes made of steel grade L360M with a diameter of 406 millimeters, it successfully carried out China’s first full-scale, long-duration high-pressure test at 6.3 megapascals using pure hydrogen, thereby gaining valuable experience in the development of hydrogen transport pipelines and their full-scale evaluation. On this basis, the R&D team at Baoji Steel Pipe made concerted efforts to use spiral welded pipes made of steel grade L415M with a diameter of 508 millimeters; after 100 days of work, they successfully completed this test under conditions of a high pressure of 6.3 megapascals and a hydrogen concentration of 20%. This achievement provides the necessary equipment and technical support for China to achieve large-scale, low-cost long-distance hydrogen transportation.