Large-diameter precision seamless steel pipe is an important industrial material with unique characteristics and a wide range of applications. Nansteel Manufacturing Co., Ltd carefully summarizes the characteristics, process, material and other information of large-diameter precision seamless steel pipe:
What is a large diameter precision seamless steel pipe?
Large-diameter precision seamless steel pipe refers to a seamless steel pipe with an outer diameter greater than or equal to 114mm, which is directly rolled or extruded on a round billet through hot rolling, cold rolling or extrusion. It has the characteristics of uniform wall thickness, precise size, smooth surface, stable performance, etc., and is widely used in the fields of petroleum, chemical industry, electric power, machinery manufacturing, etc.
Characteristics of large diameter precision seamless steel pipe
High precision: small dimensional tolerance, good roundness, small ovality.
High strength: excellent mechanical properties, high tensile strength and yield strength.
High toughness: good plasticity and toughness, not easy to break.
Good surface quality: high surface finish, no oxide scale, cracks and other defects.
Wide range of sizes: large caliber range, wall thickness can be customized according to customer requirements.
Production Technology of Large Diameter Precision Seamless Steel Pipe
Hot rolling method: Heat the round billet to a plastic state, roll it into a tube billet through a pass, and then roll it into a finished tube through a tube rolling mill.
Cold rolling method: Cold-roll the hot-rolled tube billet to improve the dimensional accuracy and surface quality of the tube.
Extrusion method: After heating the round billet, extrude it into a tube billet through an extruder, and then roll it into a finished tube through a tube rolling mill.
Materials of Large Diameter Precision Seamless Steel Pipes
Carbon steel: Q235B, Q345B, etc., with relatively low prices, widely used in general structural parts and fluid delivery pipes.
Alloy steel: 16Mn, 20CrMo, etc., with high strength, good toughness, high temperature resistance and corrosion resistance, commonly used in high-pressure boiler pipes, oil drilling pipes, etc.
Stainless steel: 304, 316L, etc., with extremely strong corrosion resistance, suitable for food, medicine, chemical and other industries.
Application of Large Diameter Precision Seamless Steel Pipe
Petroleum industry: oil well pipes, casing, oil pipelines, etc.
Chemical industry: chemical pipelines, reactors, etc.
Electric power industry: boiler tubes, heat exchanger tubes, etc.
Machinery manufacturing: hydraulic cylinders, cylinders, etc.
Construction engineering: high-rise building structures, bridges, etc.
Selection of Large Diameter Precision Seamless Steel Pipes
When purchasing large-diameter precision seamless steel pipes, the following factors should be considered:
Material: Select the appropriate material according to the use environment and requirements.
Size: Select the appropriate outer diameter and wall thickness according to the design requirements.
Precision: Select different production processes according to the precision requirements.
Performance: Select steel pipes with corresponding mechanical properties according to the use requirements.
What is a large diameter precision seamless steel pipe?
Large-diameter precision seamless steel pipe refers to a seamless steel pipe with an outer diameter greater than or equal to 114mm, which is directly rolled or extruded on a round billet through hot rolling, cold rolling or extrusion. It has the characteristics of uniform wall thickness, precise size, smooth surface, stable performance, etc., and is widely used in the fields of petroleum, chemical industry, electric power, machinery manufacturing, etc.
Characteristics of large diameter precision seamless steel pipe
High precision: small dimensional tolerance, good roundness, small ovality.
High strength: excellent mechanical properties, high tensile strength and yield strength.
High toughness: good plasticity and toughness, not easy to break.
Good surface quality: high surface finish, no oxide scale, cracks and other defects.
Wide range of sizes: large caliber range, wall thickness can be customized according to customer requirements.
Production Technology of Large Diameter Precision Seamless Steel Pipe
Hot rolling method: Heat the round billet to a plastic state, roll it into a tube billet through a pass, and then roll it into a finished tube through a tube rolling mill.
Cold rolling method: Cold-roll the hot-rolled tube billet to improve the dimensional accuracy and surface quality of the tube.
Extrusion method: After heating the round billet, extrude it into a tube billet through an extruder, and then roll it into a finished tube through a tube rolling mill.
Materials of Large Diameter Precision Seamless Steel Pipes
Carbon steel: Q235B, Q345B, etc., with relatively low prices, widely used in general structural parts and fluid delivery pipes.
Alloy steel: 16Mn, 20CrMo, etc., with high strength, good toughness, high temperature resistance and corrosion resistance, commonly used in high-pressure boiler pipes, oil drilling pipes, etc.
Stainless steel: 304, 316L, etc., with extremely strong corrosion resistance, suitable for food, medicine, chemical and other industries.
Application of Large Diameter Precision Seamless Steel Pipe
Petroleum industry: oil well pipes, casing, oil pipelines, etc.
Chemical industry: chemical pipelines, reactors, etc.
Electric power industry: boiler tubes, heat exchanger tubes, etc.
Machinery manufacturing: hydraulic cylinders, cylinders, etc.
Construction engineering: high-rise building structures, bridges, etc.
Selection of Large Diameter Precision Seamless Steel Pipes
When purchasing large-diameter precision seamless steel pipes, the following factors should be considered:
Material: Select the appropriate material according to the use environment and requirements.
Size: Select the appropriate outer diameter and wall thickness according to the design requirements.
Precision: Select different production processes according to the precision requirements.
Performance: Select steel pipes with corresponding mechanical properties according to the use requirements.
