Classification Of Stainless Steel Pipes

Stainless steel pipes are classified by material into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, as well as bimetallic composite pipes, coated and coated pipes that save precious metals and meet special requirements. There are various types and uses of stainless steel pipes, with different technical requirements and production methods. The current production of steel pipes has an outer diameter range of 0.1-450mm and a wall thickness range of 0.01-250mm. To distinguish its characteristics, steel pipes are usually classified according to the following method.
Production method
Stainless steel pipes are divided into two categories according to production methods: seamless pipes and welded pipes. Seamless steel pipes can also be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, and extruded pipes. Cold drawing and cold-rolled pipes are secondary processing of steel pipes; Welded pipes are divided into straight seam welded pipes and spiral welded pipes, etc.
Section shape
Stainless steel pipes can be divided into round pipes and irregular pipes according to their cross-sectional shape. Irregular pipes include rectangular pipes, diamond pipes, elliptical pipes, hexagonal pipes, octagonal pipes, and various asymmetric pipes with different cross-sections. Irregular pipes are widely used in various structural components, tools, and mechanical components. Compared with circular pipes, special-shaped pipes generally have larger moments of inertia and cross-sectional modulus, as well as greater bending and torsion resistance, which can greatly reduce structural weight and save steel.
Stainless steel pipes can be divided into equal section pipes and variable section pipes according to their longitudinal shape. Variable cross-section pipes include conical pipes, stepped pipes, and periodic cross-section pipes.
Tube end shape
Stainless steel pipes can be divided into plain pipes and threaded pipes (with threaded steel pipes) based on their end conditions. Car thread pipes can be divided into ordinary car thread pipes (low-pressure pipes for conveying water, gas, etc., connected by ordinary cylindrical or conical pipe threads) and special threaded pipes (pipes for petroleum and geological drilling, and important car thread pipes connected by special threads). For some special pipes, in order 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 the car thread.