1. Stainless steel pipes can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni (200 series) and precipitation hardening series (600 series) according to their composition.
2. Stainless steel pipes are divided into seamless pipes and welded pipes according to the production method. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes and extruded pipes. Cold-drawn and cold-rolled pipes are steel pipes. Secondary processing; welded pipes are divided into straight seam welded pipes and spiral welded pipes.
3. Stainless steel pipes can be divided into round pipes and special-shaped pipes according to the cross-sectional shape. Special-shaped tubes include rectangular tubes, rhombus tubes, oval tubes, hexagonal tubes, octagonal tubes, and various asymmetrical cross-section tubes. Stainless steel pipes can be divided into equal-section pipes and variable-section pipes according to the shape of the longitudinal section. Variable section tubes include tapered tubes, stepped tubes and periodic section tubes.
4. Stainless steel pipes can be divided into smooth pipes and threaded pipes (threaded steel pipes) according to the state of the pipe ends. The threaded pipe can be divided into the ordinary threaded pipe (pipes for conveying water, gas and other low pressure, which are connected by ordinary cylindrical or tapered pipes) and special threaded pipes (pipes for petroleum and geological drilling. For important threaded pipes, use Special thread connection). For some special pipes, in order to compensate 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 turning the wire.
5. According to the purpose, it can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), line pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipe, petroleum Cracking pipe) and ship pipes.

Huzhou Nanxun Yintuo Special Material Technology Co., Ltd., as a seamless pipe manufacturer, has seamless pipes for sale. If you want to know more about seamless pipes, you can contact us.