Production technology of seamless steel pipe in China seamless steel pipe plant
According to the production method of Seamless Steel Pipe plant, China Baote Steel Pipe is divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe, extruded pipe, pipe jacking, etc. According to the section shape, seamless steel pipes are divided into circular and special-shaped pipes. Special-shaped pipes have many complex shapes, such as square,...
According to the production method of Seamless Steel Pipe plant, China Baote Steel Pipe is divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe, extruded pipe, pipe jacking, etc. According to the section shape, seamless steel pipes are divided into circular and special-shaped pipes. Special-shaped pipes have many complex shapes, such as square, oval, triangular, hexagonal, melon seed, star and winged pipes. The large diameter is 650mm and the small diameter is 0.3mm.
According to different uses, there are thick wall tubes and thin wall tubes. Seamless steel pipe is mainly used for petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural steel pipe for automobile, tractor and aviation.
Seamless steel pipes are widely used in China. Seamless steel pipes for general purposes are rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with large output. They are mainly used as pipes or structural parts for conveying fluid
2. There are three types of supply according to different purposes: A. supply according to chemical composition and mechanical properties; b. Supply according to mechanical properties; c. Supply according to hydrostatic test. If the steel pipe supplied according to class A and B is used to bear liquid pressure, it shall also be subject to hydrostatic test. 3. Seamless pipes for special purposes include seamless pipes for boilers, chemical and electric power, seamless steel pipes for geology and seamless pipes for petroleum.
Seamless steel pipe has hollow section and is widely used as pipeline for conveying fluid, such as pipeline for conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has lighter weight when its bending and torsional strength is the same. It is an economic section steel.
It is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. It can improve the material utilization rate, simplify the manufacturing process and save materials and processing hours. It has been widely manufactured with steel pipe.
Main production processes of China's steel pipe plant
① Main production process of hot rolled seamless steel pipe (△ main inspection process):
Preparation and inspection of pipe blank △ → heating of pipe blank → perforation → pipe rolling → reheating of steel pipe → sizing (reducing) → heat treatment △ → straightening of finished pipe → finishing → inspection △ (nondestructive, physical and chemical, bench inspection) → warehousing
② Main production processes of cold rolled (drawn) seamless steel pipe:
Blank preparation → pickling and lubrication → cold rolling (drawing) → heat treatment → straightening → finishing → inspection