Steels that are open at both ends and have a hollow section, and whose length is larger than the circumference of the section, can be called steel pipes. When the length is small compared to the perimeter of the section, it can be called a pipe section or a tubular fitting, which are all in the category of pipe products.
For more than sixty years, architects have used stainless steel to build cost-effective permanent buildings. Many existing buildings have fully demonstrated the correctness of this choice, some of which are very ornamental, such as New York City. The Chrysler Building, but in many other applications, the role of stainless steel is not so compelling, but it plays an important role in the aesthetics and performance of the building, for example, because stainless steel has more properties than other metal materials of the same thickness. Wear resistance and indentation resistance, so it is the material of choice for designers when building sidewalks in places with large population movements.