What are the common classifications of stainless steel pipes in the market?

There are various types of stainless steel on the market now, with multiple specifications, materials, and uses. Here, the editor of Ruijie Steel Pipe has sorted out the common classifications of stainless steel pipes, which can provide a visual understanding of stainless steel pipes.

1. Production method:

Stainless steel welded pipes are divided into two categories according to production methods: seamless pipes and welded pipes. Seamless steel pipes can be further divided into hot-rolled pipes, cold-rolled pipes, cold drawn pipes, and extruded pipes. Cold drawn and cold-rolled pipes are secondary processing of steel pipes; Welded pipes are divided into straight seam welded pipes and spiral welded pipes.

2. Section shape:

Stainless steel welded pipes can be divided into round pipes and irregular pipes according to their cross-sectional shape. Irregular tubes include rectangular tubes, diamond shaped tubes, elliptical tubes, hexagonal tubes, octagonal tubes, and asymmetric cross-section tubes. Irregular tubes are used for structural components, tools, and mechanical parts. Compared with circular tubes, irregular tubes generally have larger moments of inertia and section moduli, and have larger bends.

3. Vertical section shape:

Twisting ability can greatly reduce structural weight and save steel. According to the shape of the longitudinal section, it can be divided into equal section pipes and variable section pipes. Variable cross-section pipes include conical pipes, stepped pipes, and periodic cross-section pipes.

4. Tube end shape:

Stainless steel welded pipes can be divided into plain pipes and threaded pipes (threaded steel pipes) according to the end state of the pipe. Car threading pipes can be divided into ordinary car threading pipes (used for conveying low-pressure pipes such as water and gas, connected by ordinary cylindrical or conical pipe threads) and threaded pipes (used for oil and geological drilling, and for important car threading pipes, threaded connections are used). For some pipes, to compensate for the influence of threads on the strength of the pipe end, the pipe end is usually thickened (internally thickened, externally thickened, or internally and externally thickened) before car threading.

5. Application: Stainless steel pipes for industrial piping, mechanical construction, and building decoration;

6. Surface treatment: original surface, matte surface, dull surface, coarse sand, fine sand, matte surface, etc.