Introduction of Stainless Steel Pipe

Stainless steel pipe is a kind of hollow long round steel. It is mainly 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 is the same, the weight is light, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also often used as furniture and kitchenware. Below we introduce the relevant knowledge of stainless steel pipes in detail.

 

Detailed introduction of stainless steel pipe

 

Hardness

Stainless steel pipes generally use three Brinell, Rockwell, Vickers hardness indicators to measure their hardness. Among the stainless steel pipe standards, Brinell hardness is the most widely used, and the hardness of the material is often expressed by the diameter of the indentation, which is intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.

 

Hardness test

For stainless steel pipes with an inner diameter of more than 6.0mm and a wall thickness of less than 13mm, an annealed stainless steel pipe with a W-B75 type hardness tester can be used. It is very fast and simple to test and is suitable for fast and non-destructive qualification inspection of stainless steel pipes.

 

Stainless steel pipes with inner diameter greater than 30mm and wall thickness greater than 1.2mm are tested for HRB and HRC hardness using Rockwell hardness tester. Stainless steel pipe with inner diameter greater than 30mm and wall thickness less than 1.2mm. The surface Rockwell hardness tester is used to test HRT or HRN hardness. For stainless steel tubes with inner diameters less than 0mm and greater than 4.8mm, the Rockwell hardness tester for pipes is used to test the HR15T hardness.

  

Development of stainless steel pipes

 

Any steel material that is open at both ends and has a hollow section, and whose length is larger than the perimeter of the section, can be called a steel pipe. When the length is smaller than the perimeter of the section, it can be called a pipe segment or a pipe fitting, which are all in the category of pipe products.

 

For more than six decades, architects have chosen stainless steel to build cost-effective permanent buildings. Many existing buildings fully illustrate the correctness of this choice. Some are very ornamental, such as the Chrysler Building in New York City. But in many other applications, the role of stainless steel is less dramatic, but it plays an important role in the aesthetics and performance of buildings. For example, because stainless steel is more resistant to abrasion and indentation than other metal materials of the same thickness, it is the material of choice for designers when building sidewalks in areas with large population movements.

 

Stainless steel has been used as a structural material for the construction of new buildings and for the restoration of historical sites for more than 70 years. Early designs were calculated according to basic principles. Today, design codes, such as the American Society of Civil Engineers' standard ANSI / ASCE-8-90 "Code for Design of Cold-formed Stainless Steel Structural Parts" and the "Design Manual for Structural Stainless Steel" jointly published by NiDI and Euro Inox; this simplifies long life Design of structural components with good integrity.

  

What are the specific applications and classifications of stainless steel pipes? The next article tells you the answer.