Pipeline steel is a specialized, high-strength, low-alloy (HSLA) material designed for constructing energy transmission pipelines. Gas pipeline steel, a critical category within this group, is engineered to withstand extreme internal pressures, fluctuating temperatures, and environmental stresses. Its key properties include exceptional toughness, excellent weldability for seamless long-distance installation, and resistance to fractures. Advanced thermomechanical processing creates fine-grained microstructures, ensuring both strength and durability. This makes modern gas pipeline steel the fundamental, safe, and reliable backbone for the global transportation of natural gas over vast distances.