GB/T 6479 is a Chinese national standard for seamless steel pipes used in high-pressure fertilizer equipment and pipelines. It covers grades like 10, 20, 16Mn, and 15CrMo, designed for strength, durability, and resistance to corrosion and high temperatures. These pipes are manufactured through hot or cold forming processes, ensuring precise dimensions and excellent surface quality.
GB/T 6479 pipes undergo rigorous testing for mechanical properties, chemical composition, and hydrostatic performance. They are widely used in chemical, petrochemical, and fertilizer industries, providing reliable performance under high-pressure and high-temperature conditions.
Standard and Material Grades: GB/T 6479 specifies seamless steel pipes for high-pressure chemical fertilizer equipment and other chemical applications. It includes grades such as 10#, 20#, Q345B, 12CrMo, and 15CrMo. These grades are suitable for high-pressure and high-temperature applications.
Chemical Composition and Mechanical Properties: For example, Grade 15CrMo has a carbon content of 0.12-0.18%, silicon 0.17-0.37%, manganese 0.40-0.70%, chromium 0.80-1.10%, and molybdenum 0.40-0.55%. Its tensile strength ranges from 440 to 640 MPa, with a minimum yield strength of 295 MPa and elongation of at least 21%.
GB/T 6479 seamless steel pipes are known for their high strength and durability, making them suitable for high-pressure and high-temperature applications. They are manufactured from high-quality carbon and alloy steel, ensuring uniform thickness and smooth surfaces. These pipes offer excellent corrosion resistance and maintain their structural integrity under extreme conditions. Their smooth internal surfaces minimize friction, enhancing fluid flow efficiency. Additionally, they are highly resistant to abrasion and impact, further extending their service life.
GB/T 6479 seamless steel pipes are widely used in industries such as fertilizer production, chemical processing, petroleum, natural gas, power generation, and metallurgy. They are essential components in high-pressure fluid transportation systems, including ammonia and urea production equipment. These pipes are also used in oil refineries, chemical plants, and power plants for transporting high-temperature and high-pressure gases and liquids. Their versatility and reliability make them a preferred choice for various industrial applications requiring high performance and safety.