Stainless steel welded pipes can be divided into many types, and the classification of stainless steel welded pipes is also different according to different situations. If you want to choose a product that suits you, you must understand its classification methods. Let’s understand the different classifications of stainless steel pipes:

1. Production method

Stainless steel welded pipe can be divided into two categories: seamless pipe and welded pipe according to the production method. Seamless steel pipe can be divided into hot‑rolled pipe, cold‑rolled pipe, cold‑drawn pipe and extruded pipe. Processing; 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 special‑shaped pipes according to the cross‑sectional shape. Special‑shaped tubes include rectangular tubes, diamond‑shaped tubes, elliptical tubes, hexagonal tubes, octagonal tubes and various tubes with asymmetric sections. Special‑shaped tubes are widely used in various structural parts, tools and mechanical parts. The tube generally has a larger moment of inertia and section modulus, and has a larger bending resistance.

3. Torsion resistance can greatly reduce the weight of the structure and save steel.

According to the shape of longitudinal section, it can be divided into equal section tube and variable section tube. Variable section tubes include tapered tubes, stepped tubes and periodic section tubes.

4. Pipe end shape

Stainless steel welded pipes can be divided into light pipes and wire pipes (threaded steel pipes) according to the state of the pipe ends. The threading pipe can be divided into ordinary threading pipe (pipes for low‑pressure transportation of water, gas, etc., which are connected by ordinary cylindrical or conical pipe threads) and special threaded pipes (pipes for petroleum and geological drilling. For important threading pipes, use Special threaded connection), for some special pipes, in order to make up 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 threading.