The article discusses the importance of hydrogen energy in addressing environmental and energy challenges, emphasizing hydrogen blending into natural gas pipelines for efficient transportation. It highlights the significant role of hydrogen in reducing carbon emissions and promoting energy industry development. The article delves into the complexities of urban gas pipeline networks, emphasizing the need for safe and homogeneous hydrogen distribution to residential and industrial users. Safety concerns related to hydrogen blending, such as stratification and permeation leakage risks, are outlined. The varying impact of hydrogen on pipeline materials and the potential dangers of high hydrogen concentrations are addressed. Researchers are conducting experimental and numerical simulation studies to optimize hydrogen-blended gas transport, focusing on factors like pressure fluctuation and power optimization. Understanding the implications of hydrogen blending on physical parameters and safety is crucial for successful integration into urban gas networks.