Stainless steel pipe is a hollow strip of round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures stainless steel pipe supplier. Also used as furniture and kitchenware. ,
Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and bimetallic composite pipes, coatings and coating pipes for saving precious metals and meeting special requirements. . Stainless steel tubes are available in a wide variety of applications, with different technical requirements and different production methods. The outer diameter of the currently produced steel pipe ranges from 0.1 to 4500 mm and the wall thickness ranges from 0.01 to 250 mm. In order to distinguish the characteristics, the steel pipes are usually classified as follows.
Types of stainless steel pipes:
1.Tube end shape
The stainless steel tube can be divided into a light pipe and a wire tube (threaded steel pipe) according to the state of the pipe end. The wire tube can be divided into ordinary wire tube (transporting water, gas and other low pressure tubes, using ordinary cylindrical or conical tube thread connection) and special threaded tubes (oil, geological drilling tubes, for important wire tubes) Special threaded connection) For some special tubes, in order to compensate for the influence of the thread on the strength of the tube end, the tube end is usually thickened (inner thickening, outer thickening or inner and outer thickening) before the wire.
According to the application, it can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structural pipe, hydraulic pillar pipe, gas cylinder pipe, geological pipe, chemical pipe (high pressure fertilizer pipe, petroleum cracking pipe). ) and ships and other tubes.
According to the production mode, the stainless steel pipe is divided into two types: seamless pipe and welded pipe. The seamless steel pipe can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extruded pipe, etc. Cold drawing and cold rolling are secondary to steel pipe. Processing; welded pipes are divided into straight welded pipes and spiral welded pipes.
Stainless steel tubes can be divided into round tubes and shaped tubes according to the cross-sectional shape. The special-shaped tube has a rectangular tube, a rhombic tube, an elliptical tube, a hexagonal tube, an eight-sided tube, and various cross-section asymmetric tubes. Shaped tubes are widely used in a variety of structural parts, tools and mechanical parts. Compared with the round pipe, the special-shaped pipe generally has a large moment of inertia and a section modulus, and has a large bending and torsion resistance, which can greatly reduce the structural weight and save steel.
Stainless steel pipes can be divided into equal-section pipes,1 1 4 schedule 40 stainless steel pipe and variable-section pipes according to the longitudinal section shape. The variable section pipe has a conical tube, a stepped tube and a periodic section tube.
Stainless steel welded pipe production process:
Raw materials – slitting – welding pipe – trimming – polishing – inspection (printing) – packaging – shipping (into the warehouse) (decorative welded pipe).
Raw materials–striping–welding pipe–heat treatment–correction–straightening–trimming–pickling–hydraulic pressure test–inspection (printing)-packaging–shipping (warehouse) (Pipe pipe industrial piping pipe).