| Customization: | Available |
|---|---|
| Application: | Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry |
| Certification: | ISO9001 |
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Classification of stainless steel pipes:
According to different alloying elements and proportions, stainless steel can be divided into many types, such as austenitic stainless steel, martensitic stainless steel, ferritic stainless steel, etc. Each type has its unique properties and applications.
According to the production process of steel pipes, stainless steel pipes can be divided into two basic categories: stainless steel seamless pipes and stainless steel welded pipes (seamed steel pipes). According to the outer diameter and shape of steel pipes, they can be divided into round pipes and special-shaped pipes. The most widely used are circular steel pipes, but there are also some special-shaped steel pipes such as square, rectangular, semicircular, hexagonal, equilateral triangle, and octagonal shapes.
Stainless Steel Seamless Pipe:
Stainless steel seamless pipe is a pipe material made by seamless technology. Its internal and external surfaces have high smoothness, which greatly improves the corrosion resistance, high temperature resistance and compressive strength of the pipe. Therefore, stainless steel seamless pipes are widely used in high-end fields such as chemical industry, petroleum, and electric power, as well as general fields such as construction and automobiles.
Stainless steel seamless pipes also have some advantages during installation and use, such as simple connection methods, low installation costs, and easy maintenance. This makes stainless steel seamless pipe an ideal choice for many occasions.
Stainless steel welded pipe is a pipe material made through welding process, which has the advantages of relatively high cost-effectiveness and simple manufacturing process. Therefore, in some scenarios where appearance requirements are not high and installation conditions are limited, stainless steel welded pipes are a more economical and affordable choice.
Since welding will produce certain defects, such as pores, inclusions, etc., the internal and external surface smoothness of stainless steel welded pipes is not as high as that of stainless steel seamless pipes, and the corrosion resistance, high temperature resistance and compressive strength are also slightly inferior. Therefore, in some occasions, such as chemical industry and other high-end fields, stainless steel welded pipes may not be able to meet the requirements.
Stainless steel welded pipes can be divided into two types: straight seam welded pipes (ERW) and spiral welded pipes (SSAW) according to the weld form. Straight seam welded pipe means that the welded joints are in a straight line, while spiral welded pipe means that the steel strip is rolled into a pipe blank at a certain spiral angle and then welded. These two classifications are mainly based on differences in production processes.
Stainless Steel ERW Pipe is a straight seam electric resistance welded pipe, abbreviated as ERW, which is a type of high-frequency straight seam electric resistance welded pipe. This kind of pipe uses the skin effect and proximity effect of high-frequency current to heat and melt the edge of the pipe blank, and then performs pressure welding under the action of the extrusion roller to achieve production.
ERW steel pipes occupy an important position in the field of transportation pipes in the world due to their high production efficiency, low cost, material saving and easy automation. It is mainly used to transport vapor and liquid objects such as oil and natural gas, and can meet various requirements of high and low pressure.
Stainless steel seamless pipe VS Stainless steel welded pipe: How to choose?
Generally speaking, if the internal and external surfaces of the pipeline are required to have high finish, corrosion resistance, high temperature resistance and strong compressive strength, stainless steel seamless pipes should be given priority. If the appearance requirements are not high and the installation cost and manufacturing cost are also important, stainless steel welded pipes should be considered.
However, in some important areas, such as high temperature and high pressure, special media and high-precision pipelines, only stainless steel seamless pipes can be used.
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