Stainless steel pipe is a hollow long round steel, which is widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation, and other industrial pipelines and mechanical structural parts. In addition, when the bending and torsion strength are the same, the weight is lighter, so stainless steel round pipe is also widely used in the manufacture of mechanical parts and engineering structures. Also, it is often used as furniture and kitchen utensils.
Production Process
Raw material-slitting-welding pipe-trimming-polishing-inspection (spray printing)-packaging-shipping (warehouse) (decorative welded pipe).
Raw material-slitting-welding pipe-heat treatment-straightening-straightening-trimming-pickling-water pressure test-inspection (printing)-packaging-shipping (warehouse) (Pipe for industrial piping of welded pipe).
Classification
Stainless steel round 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, as well as bimetal composite pipes, plating and coating pipes to save precious metals and meet special requirements. There are many types of stainless steel pipes, different uses, different technical requirements, and different production methods. The currently produced steel pipes have an outer diameter range of 0.1-4500mm and a wall thickness range of 0.01-250mm. In order to distinguish its characteristics, steel pipes are usually classified as follows.
1. According to the production method
Stainless steel pipes are divided into seamless pipes and welded pipes according to production methods. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes. Cold-drawn and cold-rolled are secondary Processing. Welded pipe is divided into straight seam welded pipe and spiral welded pipe.
2. According to the section shape
Stainless steel pipes can be divided into round pipes and special-shaped pipes according to the cross-sectional shape. Special-shaped tubes include rectangular tubes, rhombus tubes, oval tubes, hexagonal tubes, octagonal tubes, and various asymmetrical cross-section tubes. Special-shaped pipes are widely used in various structural parts, tools, and mechanical parts. Compared with round pipes, special-shaped pipes generally have larger moments of inertia and section modulus and have greater resistance to bending and torsion, which can greatly reduce structural weight and save steel.
Stainless steel pipes can be divided into equal section pipes and variable section pipes according to the shape of the longitudinal section. Variable section tubes include tapered tubes, stepped tubes, and periodic section tubes.
3. According to the shape of the pipe end
Stainless steel tubes can be divided into smooth tubes and threaded tubes (threaded steel pipes) according to the state of the pipe ends. The threaded pipe can be divided into the ordinary threaded pipes (pipes for conveying water, gas, and other low pressure, which are connected by ordinary cylindrical or tapered pipes) and special threaded pipes (pipes for petroleum and geological drilling. For important threaded pipes, use Special thread connection). For some special pipes, in order to compensate for the influence of the thread on the strength of the pipe end, the pipe end is usually thickened (internal thickening, external thickening, or internal and external thickening) before turning the wire.
4. Classification by purpose
According to the purpose, it can be divided into oil well pipe (casing, tubing and drill pipe, etc.), line pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipe, petroleum cracking pipe, etc.) ) and ship pipes.
Connection method
There are many ways to connect stainless steel pipes. Common types of pipe fittings include compression, compression, articulation, push-in, push-thread, socket welding, articulated flange connection, welding and welding, and traditional connections. Combined derivative series connection mode. These connection methods have different applicable scopes according to their different principles, but most of them are easy to install, firm, and reliable. The sealing ring or gasket material used in the connection is mostly silicone rubber, nitrile rubber, and EPDM rubber that meet the requirements of national standards, so as to avoid users’ worries.
Compression connection steps
1. Broken pipe: Cut the pipe according to the required length. When breaking the pipe, do not use excessive force to prevent the pipe from being out of round.
2. Removal of burrs: After the pipe is cut, the burrs should be removed to avoid cutting the sealing ring.
3. Scribe marking: In order to make the steel pipe fully inserted into the pipe fitting socket, the insertion length must be marked and drawn on the pipe end.
4. Assembly: The sealing ring should be correctly installed in the U-shaped groove of the pipe fitting, insert the pipe into the pipe fitting socket, and wait for crimping.
5. Crimping: When crimping, the raised part of the pipe is placed in the concave groove of the mold, and the jaws are kept perpendicular to the pipe axis.
6. Inspection: After the crimping is completed, use a special gauge to check the crimping size.
Huzhou Gao Lin stainless steel pipe manufacturing Co., Ltd. is a professional stainless steel tube manufacturers and stainless steel pipe supplier, providing professional stainless steel tube and high-quality stainless steel round pipe. If you have any needs, please contact us.
