National standard seamless steel pipes are made from steel ingots or solid tube blanks that are perforated into capillary tubes, and then hot rolled, cold rolled or cold drawn. National standard steel pipes play an important role in the domestic steel pipe industry. According to incomplete statistics, there are more than 240 national standard steel pipe manufacturers in the country, more than 250 sets of seamless steel pipe units, and an annual production capacity of about 4.5 million tons.
National standard
seamless steel pipe, what is national standard seamless steel pipe? Let’s talk about the national standard seamless steel pipe. First of all, let’s talk about the national standard. The national standard is in line with the relevant standards recognized by our own country. For example, the outer diameter of the national standard seamless steel pipe: 8mm- 720mm, wall thickness 1mm-120mm. National standard seamless steel pipe material: No. 20, No. 45, Q345B, Q345C, Q345D, Q345E, Q390, Q420, 40 Lumo, 30 Lumo, 35 Lumo, 20 pot, 15 Lumo Pot, 12 Luo 1 molybdenum vanadium pot, 12 Luo 2 molybdenum, 12 Luo 5 molybdenum, 12 Luo 9 molybdenum, L245, L290, L360, L415, L450, L485, L555 06 Luo 19 Nickel 10, 022 Luo 19 Nickel 10, 06 Rock 17 nickel 12 molybdenum 2, 022 Rock 17 nickel 12 molybdenum 2, 06 Rock 18 nickel 11 titanium, 07 Rock 18 nickel 11 niobium, etc.
National standard seamless steel pipe standards: GB/T8162 seamless steel pipe for structures, GB/T8163 seamless steel pipe for fluids, GB/T3087 low and medium pressure boiler pipes, GB/T5310 high-pressure boiler pipes, GB/T6479 seamless steel pipes for high-pressure fertilizer equipment Pipes, GB/T9948 seamless steel pipes for petroleum cracking, GB/T9711 seamless pipes for oil and gas industrial transportation, GB/T14976 stainless steel seamless pipes for fluid transportation, etc.
